entity attribute value - Page 230

Validatation error "Value Error : background-position Too many values or values are not" How to so

- by metal-gear-solid

Why validation giving this error. How to solve? ul#navigation li#navigation-3 a.current Value Error : background-position Too many values or values are not recognized : -164px -164px -36px -164px -164px -36px This is error screen. CSS ul#navigation { height: 36px; left: 300px; list-style-image: none; list-style-position: outside; list-style-type: none; position: relative; top: 74px; width: 603px; } ul#navigation li { display: inline; } ul#navigation li a { height: 36px; float: left; text-decoration: none; } ul#navigation li a:link, ul#navigation li a:visited {font-family:Arial; color:#595959; font-size:1.1em; font-weight:bold } ul#navigation li a:hover, ul#navigation li a:active {color:#404040} ul#navigation li a span { display:block; float:left; padding-left:8px; padding-top:14px;} ul#navigation li#navigation-1 a { width: 53px; background: url(../images/menu-sprite.jpg) no-repeat 0px 0; } ul#navigation li#navigation-1 a:active, ul#navigation li#navigation-1 a:hover { background-position: 0px -36px; } ul#navigation li#navigation-1 a.current { background-position: 0px 0px -36px; } ul#navigation li#navigation-2 a { width: 111px; background: url(../images/menu-sprite.jpg) no-repeat -53px 0; } ul#navigation li#navigation-2 a:active, ul#navigation li#navigation-2 a:hover { background-position: -53px -36px; } ul#navigation li#navigation-2 a.current { background-position: -53px -53px -36px; } ul#navigation li#navigation-3 a { width: 78px; background: url(../images/menu-sprite.jpg) no-repeat -164px 0; } ul#navigation li#navigation-3 a:active, ul#navigation li#navigation-3 a:hover { background-position: -164px -36px; } ul#navigation li#navigation-3 a.current { background-position: -164px -164px -36px; } ul#navigation li#navigation-4 a { width: 100px; background: url(../images/menu-sprite.jpg) no-repeat -242px 0; } ul#navigation li#navigation-4 a:active, ul#navigation li#navigation-4 a:hover { background-position: -242px -36px; } ul#navigation li#navigation-4 a.current { background-position: -242px -242px -36px; } ul#navigation li#navigation-5 a { width: 88px; background: url(../images/menu-sprite.jpg) no-repeat -342px 0; } ul#navigation li#navigation-5 a:active, ul#navigation li#navigation-5 a:hover { background-position: -342px -36px; } ul#navigation li#navigation-5 a.current { background-position: -342px -342px -36px; } ul#navigation li#navigation-6 a { width: 96px; background: url(../images/menu-sprite.jpg) no-repeat -430px 0; } ul#navigation li#navigation-6 a:active, ul#navigation li#navigation-6 a:hover { background-position: -430px -36px; } ul#navigation li#navigation-6 a.current { background-position: -430px -430px -36px; } ul#navigation li#navigation-7 a { width: 77px; background: url(../images/menu-sprite.jpg) no-repeat -526px 0; } ul#navigation li#navigation-7 a:active, ul#navigation li#navigation-7 a:hover { background-position: -526px -36px; } ul#navigation li#navigation-7 a.current { background-position: -526px -526px -36px; }

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Moose read-only Attribute Traits and how to set them?

- by Evan Carroll

How do I set a Moose read only attribute trait? package AttrTrait; use Moose::Role; has 'ext' => ( isa => 'Str', is => 'ro' ); package Class; has 'foo' => ( isa => 'Str', is => 'ro', traits => [qw/AttrTrait/] ); package main; my $c = Class->new( foo => 'ok' ); $c->meta->get_attribute('foo')->ext('die') # ro attr trait What is the purpose of Read Only attribute traits if you can't set it in the constructor or in runtime? Is there something I'm missing in Moose::Meta::Attribute? Is there a way to set it using meta? $c->meta->get_attr('ext')->set_value('foo') # doesn't work either (attribute trait provided not class provided method)

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How to set ExportMetaData with multiple values as well as single w/ custom attribute ?

- by Matthew M.

I have the following ExportMetaData attributes set on my class: [Export(typeof(IDocumentViewer))] [ExportMetadata("Name", "MyViewer")] [ExportMetadata("SupportsEditing", true)] [ExportMetadata("Formats", DocFormat.DOC, IsMultiple = true)] [ExportMetadata("Formats", DocFormat.DOCX, IsMultiple = true)] [ExportMetadata("Formats", DocFormat.RTF, IsMultiple = true)] I also have a supporting interface: public interface IDocumentViewerMetaData { /// <summary> /// Gets the format. /// </summary> /// <value>The format.</value> IEnumerable<DocFormat> Formats { get; } /// <summary> /// Gets the name of the viewer /// </summary> /// <value>The name.</value> string Name { get; } /// <summary> /// Gets a value indicating whether this viewer supports editing /// </summary> /// <value><c>true</c> if [supports editing]; otherwise, <c>false</c>.</value> bool SupportsEditing { get; } } And of course my ImportMany: [ImportMany(typeof(IDocumentViewer))] public IEnumerable<Lazy<IDocumentViewer, IDocumentViewerMetaData>> _viewers { get; set; } What I would like to do is use a strongly-typed attribute class instead of using the ExportMetaData attribute. I have not figured out a way to do this while also supporting single values (Name, SupportsEditing, in the example above). I envision doing something similiar the following (or whatever is suggested as best): [Export(typeof(IDocumentViewer))] [DocumentViewerMetadata(Name = "MyViewer")] [DocumentViewerMetadata(SupportsEditing = true)] [DocumentViewerMetadata(Format = DocFormat.DOC)] [DocumentViewerMetadata(Format = DocFormat.DOCX)] I am fairly certain that there IS a way to do this, I just haven't found the right way to connect the dots. :) Thank you, Matthew

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How to generate a key for a group entity?

- by user246114

Hi, I'm trying to make a group entity. Something like: class User { } class UserColor { } ... Key key = new KeyFactory.Builder( User.class.getSimpleName(), username). .addChild(UserColor.class.getSimpleName(), ???).getKey(); I know the unique username up-front to use for the key of the User object. But I just want app engine to generate a random unique value for the key value of the UserColor instance. I think this is described here, but I don't understand their wording: http://code.google.com/appengine/docs/java/datastore/transactions.html To create an object with a system-generated numeric ID and an entity group parent, you must use an entity group parent key field (such as customerKey, above). Assign the key of the parent to the parent key field, then leave the object's key field set to null. When the object is saved, the datastore populates the key field with the complete key, including the entity group parent. and this is their example: @Persistent @Extension(vendorName="datanucleus", key="gae.parent-pk", value="true") private Key customerKey; but I don't understand - should UserColor look like this then?: class UserColor { @Persistent @Extension(vendorName="datanucleus", key="gae.parent-pk", value="true") private Key mKeyParent; @Primary private Key mKey; // leave null } ... Key keyParent = new KeyFactory.Builder( User.class.getSimpleName(), username); UserColor uc = new UserColor(); uc.setKeyParent(keyParent); pm.makePersistent(uc); // now generated for me automatically? is that correct? Using this method, I should be able to use a User and a UserColor object in a transaction together, right? Thanks

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How do I prevent a C# method from executing using an attribute validator?

- by Boydski

I'd like to create an attribute-based validator that goes a few steps beyond what I've seen in examples. It'll basically prevent methods or other functionality from executing. Please be aware that I'm having to use AzMan since I have no availability to Active Directory in this scenario. Here's some pseudo code of what what I'm looking for: // Attribute validator class AttributeUsage is arbitrary at this point and may include other items [AttributeUsage( AttributeTargets.Method | AttributeTargets.Property, AllowMultiple = true, Inherited = true )] public class PermissionsValidatorAttribute : Attribute { public PermissionsValidatorAttribute(PermissionEnumeration permission){...} public bool UserCanCreateAndEdit(){...} public bool UserCanDelete(){...} public bool UserCanUpload(){...} } Here's a sample of a class/member that'll be decorated. The method will not be executed at all if the PermissionValidator.UserCanDelete() doesn't return true from wherever it's executed: public class DoStuffNeedingPermissions { [PermissionValidator(PermissionEnumeration.MustHaveDeletePermission)] public void DeleteSomething(){...} } I know this is a simple, incomplete example. But you should get the gist of what I'm needing. Make the assumption that DeleteSomething() already exists and I'm preferring to NOT modify the code within the method at all. I'm currently looking at things like the Validation Application Block and am messing with custom attribute POC's. But I'd love to hear opinions with code samples from everyone out there. I'm also certainly not opposed to other methods of accomplishing the same thing such as extension methods or whatever may work to accomplish the same thing. Please remember I'm making the attempt to minimize changes to existing DoStuffNeedingPermissions code. Thanks everyone!

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XML Schema: How to specify an attribute with a custom 'simpleType' type?

- by mackenir

In my XML schema definition, I'm trying to restrict the value of an attribute to be an integer between 0 and 100. With reference to the sample schema below, I want attribute 'attr' on element 'root' to have this restriction. To achieve this I define a simpleType 'Percentage' and set this as the 'type' of 'attr'. However, my XML schema editor (VS 2008) flags the attribute up as having a problem: "Type 'Percentage' is not declared or is not a simple type". <?xml version="1.0" encoding="utf-8"?> <xs:schema elementFormDefault="qualified" id="test" xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://testtttt"> <xs:simpleType name="Percentage"> <xs:restriction base="xs:integer"> <xs:minInclusive value="0"/> <xs:maxInclusive value="100"/> </xs:restriction> </xs:simpleType> <xs:element name="root"> <xs:complexType> <xs:attribute name="attr" type="Percentage" use="optional" /> </xs:complexType> </xs:element>

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how to pass a variable value from one class to another

- by Arunabha

I have two packages one is com.firstBooks.series.db.parser which have a java file XMLParser.java, I have another package com.firstBooks.series79 which have a class called AppMain.NW I want to send the value of a variable called _xmlFileName frm AppMain class to the xmlFile variable in XMLParser class, I am posting the code for both the class, kindly help me. package com.firstBooks.series.db.parser; import java.io.IOException; import java.io.InputStream; import java.util.Vector; import net.rim.device.api.xml.parsers.DocumentBuilder; import net.rim.device.api.xml.parsers.DocumentBuilderFactory; import net.rim.device.api.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; import com.firstBooks.series.db.Question; public class XMLParser { private Document document; public static Vector questionList; public static String xmlFile; public XMLParser() { questionList = new Vector(); } public void parseXMl() throws SAXException, IOException, ParserConfigurationException { // Build a document based on the XML file. DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); InputStream inputStream = getClass().getResourceAsStream(xmlFile); document = builder.parse(inputStream); } public void parseDocument() { Element element = document.getDocumentElement(); NodeList nl = element.getElementsByTagName("question"); if (nl != null && nl.getLength() > 0) { for (int i = 0; i < nl.getLength(); i++) { Element ele = (Element) nl.item(i); Question question = getQuestions(ele); questionList.addElement(question); } } } private Question getQuestions(Element element) { String title = getTextValue(element, "title"); String choice1 = getTextValue(element, "choice1"); String choice2 = getTextValue(element, "choice2"); String choice3 = getTextValue(element, "choice3"); String choice4 = getTextValue(element, "choice4"); String answer = getTextValue(element, "answer"); String rationale = getTextValue(element, "rationale"); Question Questions = new Question(title, choice1, choice2, choice3, choice4, answer, rationale); return Questions; } private String getTextValue(Element ele, String tagName) { String textVal = null; NodeList nl = ele.getElementsByTagName(tagName); if (nl != null && nl.getLength() > 0) { Element el = (Element) nl.item(0); textVal = el.getFirstChild().getNodeValue(); } return textVal; } } Nw the code for AppMain class //#preprocess package com.firstBooks.series79; import net.rim.device.api.ui.UiApplication; import com.firstBooks.series.ui.screens.HomeScreen; public class AppMain extends UiApplication { public static String _xmlFileName; public static boolean _Lite; public static int _totalNumofQuestions; public static void initialize(){ //#ifndef FULL /* //#endif _xmlFileName = "/res/Series79_FULL.xml"; _totalNumofQuestions = 50; _Lite = false; //#ifndef FULL */ //#endif //#ifndef LITE /* //#endif _xmlFileName = "/res/Series79_LITE.xml"; _totalNumofQuestions = 10; _Lite = true; //#ifndef LITE */ //#endif } private AppMain() { initialize(); pushScreen(new HomeScreen()); } public static void main(String args[]) { new AppMain().enterEventDispatcher(); } }

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Visual Studio reports that not all code path return a value, even though they do

- by chris12892

I have an API in NETMF C# that I am writing that includes a function to send an HTTP request. For those who are familiar with NETMF, this is a heavily modified version of the "webClient" example, which a simple application that demonstrates how to submit an HTTP request, and recive a response. In the sample, it simply prints the response and returns void,. In my version, however, I need it to return the HTTP response. For some reason, Visual Studio reports that not all code paths return a value, even though, as far as I can tell, they do. Here is my code... /// <summary> /// This is a modified webClient /// </summary> /// <param name="url"></param> private string httpRequest(string url) { // Create an HTTP Web request. HttpWebRequest request = HttpWebRequest.Create(url) as HttpWebRequest; // Set request.KeepAlive to use a persistent connection. request.KeepAlive = true; // Get a response from the server. WebResponse resp = request.GetResponse(); // Get the network response stream to read the page data. if (resp != null) { Stream respStream = resp.GetResponseStream(); string page = ""; byte[] byteData = new byte[4096]; char[] charData = new char[4096]; int bytesRead = 0; Decoder UTF8decoder = System.Text.Encoding.UTF8.GetDecoder(); int totalBytes = 0; // allow 5 seconds for reading the stream respStream.ReadTimeout = 5000; // If we know the content length, read exactly that amount of // data; otherwise, read until there is nothing left to read. if (resp.ContentLength != -1) { for (int dataRem = (int)resp.ContentLength; dataRem > 0; ) { Thread.Sleep(500); bytesRead = respStream.Read(byteData, 0, byteData.Length); if (bytesRead == 0) throw new Exception("Data laes than expected"); dataRem -= bytesRead; // Convert from bytes to chars, and add to the page // string. int byteUsed, charUsed; bool completed = false; totalBytes += bytesRead; UTF8decoder.Convert(byteData, 0, bytesRead, charData, 0, bytesRead, true, out byteUsed, out charUsed, out completed); page = page + new String(charData, 0, charUsed); } page = new String(System.Text.Encoding.UTF8.GetChars(byteData)); } else throw new Exception("No content-Length reported"); // Close the response stream. For Keep-Alive streams, the // stream will remain open and will be pushed into the unused // stream list. resp.Close(); return page; } } Any ideas? Thanks...

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Symfony2 entity field type alternatives to "property" or "__toString()"?

- by Polmonino

Using Symfony2 entity field type one should specify property option: $builder->add('customers', 'entity', array( 'multiple' => true, 'class' => 'AcmeHelloBundle:Customer', 'property' => 'first', )); But sometimes this is not sufficient: think about two customers with the same name, so display the email (unique) would be mandatory. Another possibility is to implement __toString() into the model: class Customer { public $first, $last, $email; public function __toString() { return sprintf('%s %s (%s)', $this->first, $this->last, $this->email); } } The disadvances of the latter is that you are forced to display the entity the same way in all your forms. Is there any other way to make this more flexible? I mean something like a callback function: $builder->add('customers', 'entity', array( 'multiple' => true, 'class' => 'AcmeHelloBundle:Customer', 'property' => function($data) { return sprintf('%s %s (%s)', $data->first, $data->last, $data->email); }, ));

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merge 2 php arrays which aren't of the same length by value

- by Iain Urquhart

Excuse me if this has indeed been asked before, I couldn't see anything that fitted my needs out of the dozens of similar titled posts out there ;) I'm trying to merge 2 php arrays which aren't of the same length, and merge them on a value that exists from identical key = values within both arrays. My first query produces an array from a nested set: array ( 1 => array ( 'node_id' => 1, 'lft' => 1, 'rgt' => 4, 'moved' => 0, 'label' => 'Home', 'entry_id' => 1, 'template_path' => '', 'custom_url' => '/', 'extra' => '', 'childs' => 1, 'level' => 0, 'lower' => 0, 'upper' => 0 ), 2 => array ( 'node_id' => 2, 'lft' => 2, 'rgt' => 3, 'moved' => 0, 'label' => 'Home', 'entry_id' => NULL, 'template_path' => '', 'custom_url' => 'http://google.com/', 'extra' => '', 'childs' => 0, 'level' => 1, 'lower' => 0, 'upper' => 0 ) ); My second array returns some additional key/values I'd like to insert to the above array: array ( 'entry_id' => 1, 'entry_title' => 'This is my title', ); I want to merge both of the arrays inserting the additional information into those that match on the key 'entry_id', as well as keeping the sub arrays which don't match. So, by combining the two arrays, I'd end up with array ( 1 => array ( 'node_id' => 1, 'lft' => 1, 'rgt' => 4, 'moved' => 0, 'label' => 'Home', 'entry_id' => 1, 'template_path' => '', 'custom_url' => '/', 'extra' => '', 'childs' => 1, 'level' => 0, 'lower' => 0, 'upper' => 0, 'entry_title' => 'This is my title' ), 2 => array ( 'node_id' => 2, 'lft' => 2, 'rgt' => 3, 'moved' => 0, 'label' => 'Home', 'entry_id' => NULL, 'template_path' => '', 'custom_url' => 'http://google.com/', 'extra' => '', 'childs' => 0, 'level' => 1, 'lower' => 0, 'upper' => 0, 'entry_title' => NULL ) ); Actually, writing this out makes me think I should do it via sql... Any help/advice greatly appreciated...

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Getting value of LSB from Hex (C code)

- by Rjff

Hi - first post here :) I've got a code like this in C: unsigned char const data[ ] = {0x0a, 0x1d, 0xf0, 0x07}; I need to extract it such that the final value is: 0xa1df7 I have only been able to extract and get it working if the hex values that have at least 1 zero: unsigned char const data[ ] = {0x0a, 0xd0, 0xf0, 0x07}; using the code below: for(int i = 0; i < SIZE; ++i) { tmp = data[i]; if ( (data[i] <= 0x0F) && (((data[i] & 0x0F) == 0) || (data[i] & 0xF0) == 0)) // one of the hex is zero { tmp = ((tmp << 4) >> 4) << N[i]; std::cout << "foo: " << std::hex << tmp << ":" << std::endl; } else if ((data[i] >= 0x0F) && (((data[i] & 0x0F) == 0) || (data[i] & 0xF0) == 0) ) { tmp = (tmp >> 4) << N[i]; std::cout << "bar: " << std::hex << tmp << ":" << std::endl; } else { std::cout << "result: " << std::hex << result << ":" << std::endl; std::cout << "tmp << 8: " << std::hex << (tmp << 8)<< ":" << std::endl; result = result | (tmp << 8); std::cout << "result |= (tmp << 8): " << std::hex << result << ":" << std::endl; } result |= tmp; std::cout << "boo: " << std::hex << result << ":" << std::endl; } It seems the last else {...} block is troublesome for me. Any ideas? Thanks!

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XSL - How to disable output escaping for an attribute?

- by Kobi

I've had the following <a> tag: <a href="http://myserver/_forms?url={@FileRef}&id=5">...</a> One of the files is called "File's got apostrophe.xml". The output of the XSL is: <a href="http://myserver/_forms?url=/blah/File&#39;s got apostrophe.xml&id=5">...</a> The problem is the the apostrophe is HTML-escaped (twice?) into &#39;, which breaks the link. I've also tried using <xsl:attribute>, with same results: <a> <xsl:attribute name="href"> <xsl:value-of select="concat('http://myserver/_forms?url=', @FileRef, '&id=5')" disable-output-escaping="yes" /> </xsl:attribute> </a> Outputting <xsl:value-of select="@FileRef" disable-output-escaping="yes" /> works well - the unescaped value is printed on the page. How can I set the attribute without escaping the string?

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Why doesn't g++ pay attention to attribute((pure)) for virtual functions?

- by jchl

According to the GCC documentation, __attribute__((pure)) tells the compiler that a function has no side-effects, and so it can be subject to common subexpression elimination. This attribute appears to work for non-virtual functions, but not for virtual functions. For example, consider the following code: extern void f( int ); class C { public: int a1(); int a2() __attribute__((pure)); virtual int b1(); virtual int b2() __attribute__((pure)); }; void test_a1( C *c ) { if( c->a1() ) { f( c->a1() ); } } void test_a2( C *c ) { if( c->a2() ) { f( c->a2() ); } } void test_b1( C *c ) { if( c->b1() ) { f( c->b1() ); } } void test_b2( C *c ) { if( c->b2() ) { f( c->b2() ); } } When compiled with optimization enabled (either -O2 or -Os), test_a2() only calls C::a2() once, but test_b2() calls b2() twice. Is there a reason for this? Is it because, even though the implementation in class C is pure, g++ can't assume that the implementation in every subclass will also be pure? If so, is there a way to tell g++ that this virtual function and every subclass's implementation will be pure?

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Spring MVC: Where to place validation and how to validation entity references.

- by arrages

Let's say I have the following command bean for creating a user: public class CreateUserCommand { private String userName; private String email; private Integer occupationId; pirvate Integer countryId; } occupationId and countryId are drop down selected values on the form. They map to an entity in the database (Occupation, Country). This command object is going to be fed to a service facade like so: userServiceFacade.createUser(CreateUserCommand command); This facade will construct a user entity to be sent to the actual service. So I suppose that in the facade layer I will have to make several dao calls to map all the lookup properties of the User entity. Based on this what is the best strategy to validate that occupationId and countryId map to real entities? Where is the best place to perform this validation? There is the spring validator but I am not sure this is the best place for this, for one I am wary of this method as validation is tied to the web tier, but also that means I would need to make the dao calls in the validator for validation but I would need to call the dao's in the facade layer again when the command - entity translation occurs. Is there anything I can do better? Thanks.

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how to pass one variable value frm one class to the oder

- by Arunabha

i hav two packages one is com.firstBooks.series.db.parser which hav a java file XMLParser.java,i hav another package com.firstBooks.series79 which hav a class called AppMain.NW i want to send the value of a variable called _xmlFileName frm AppMain class to the xmlFile variable in XMLParser class,i am posting the codes for both the class,kindly help me. package com.firstBooks.series.db.parser; import java.io.IOException; import java.io.InputStream; import java.util.Vector; import net.rim.device.api.xml.parsers.DocumentBuilder; import net.rim.device.api.xml.parsers.DocumentBuilderFactory; import net.rim.device.api.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; import com.firstBooks.series.db.Question; public class XMLParser { private Document document; public static Vector questionList; public static String xmlFile; public XMLParser() { questionList = new Vector(); } public void parseXMl() throws SAXException, IOException, ParserConfigurationException { // Build a document based on the XML file. DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); InputStream inputStream = getClass().getResourceAsStream(xmlFile); document = builder.parse(inputStream); } public void parseDocument() { Element element = document.getDocumentElement(); NodeList nl = element.getElementsByTagName("question"); if (nl != null && nl.getLength() > 0) { for (int i = 0; i < nl.getLength(); i++) { Element ele = (Element) nl.item(i); Question question = getQuestions(ele); questionList.addElement(question); } } } private Question getQuestions(Element element) { String title = getTextValue(element, "title"); String choice1 = getTextValue(element, "choice1"); String choice2 = getTextValue(element, "choice2"); String choice3 = getTextValue(element, "choice3"); String choice4 = getTextValue(element, "choice4"); String answer = getTextValue(element, "answer"); String rationale = getTextValue(element, "rationale"); Question Questions = new Question(title, choice1, choice2, choice3, choice4, answer, rationale); return Questions; } private String getTextValue(Element ele, String tagName) { String textVal = null; NodeList nl = ele.getElementsByTagName(tagName); if (nl != null && nl.getLength() > 0) { Element el = (Element) nl.item(0); textVal = el.getFirstChild().getNodeValue(); } return textVal; } } Nw the code for AppMain class //#preprocess package com.firstBooks.series79; import net.rim.device.api.ui.UiApplication; import com.firstBooks.series.ui.screens.HomeScreen; public class AppMain extends UiApplication { public static String _xmlFileName; public static boolean _Lite; public static int _totalNumofQuestions; public static void initialize(){ //#ifndef FULL /* //#endif _xmlFileName = "/res/Series79_FULL.xml"; _totalNumofQuestions = 50; _Lite = false; //#ifndef FULL */ //#endif //#ifndef LITE /* //#endif _xmlFileName = "/res/Series79_LITE.xml"; _totalNumofQuestions = 10; _Lite = true; //#ifndef LITE */ //#endif } private AppMain() { initialize(); pushScreen(new HomeScreen()); } public static void main(String args[]) { new AppMain().enterEventDispatcher(); } }

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Validation in Silverlight

- by Timmy Kokke

Getting started with the basics Validation in Silverlight can get very complex pretty easy. The DataGrid control is the only control that does data validation automatically, but often you want to validate your own entry form. Values a user may enter in this form can be restricted by the customer and have to fit an exact fit to a list of requirements or you just want to prevent problems when saving the data to the database. Showing a message to the user when a value is entered is pretty straight forward as I’ll show you in the following example. This (default) Silverlight textbox is data-bound to a simple data class. It has to be bound in “Two-way” mode to be sure the source value is updated when the target value changes. The INotifyPropertyChanged interface must be implemented by the data class to get the notification system to work. When the property changes a simple check is performed and when it doesn’t match some criteria an ValidationException is thrown. The ValidatesOnExceptions binding attribute is set to True to tell the textbox it should handle the thrown ValidationException. Let’s have a look at some code now. The xaml should contain something like below. The most important part is inside the binding. In this case the Text property is bound to the “Name” property in TwoWay mode. It is also told to validate on exceptions. This property is false by default. <StackPanel Orientation="Horizontal"> <TextBox Width="150" x:Name="Name" Text="{Binding Path=Name, Mode=TwoWay, ValidatesOnExceptions=True}"/> <TextBlock Text="Name"/> </StackPanel> The data class in this first example is a very simplified person class with only one property: string Name. The INotifyPropertyChanged interface is implemented and the PropertyChanged event is fired when the Name property changes. When the property changes a check is performed to see if the new string is null or empty. If this is the case a ValidationException is thrown explaining that the entered value is invalid. public class PersonData:INotifyPropertyChanged { private string _name; public string Name { get { return _name; } set { if (_name != value) { if(string.IsNullOrEmpty(value)) throw new ValidationException("Name is required"); _name = value; if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("Name")); } } } public event PropertyChangedEventHandler PropertyChanged=delegate { }; } The last thing that has to be done is letting binding an instance of the PersonData class to the DataContext of the control. This is done in the code behind file. public partial class Demo1 : UserControl { public Demo1() { InitializeComponent(); this.DataContext = new PersonData() {Name = "Johnny Walker"}; } } Error Summary In many cases you would have more than one entry control. A summary of errors would be nice in such case. With a few changes to the xaml an error summary, like below, can be added. First, add a namespace to the xaml so the control can be used. Add the following line to the header of the .xaml file. xmlns:Controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input" Next, add the control to the layout. To get the result as in the image showed earlier, add the control right above the StackPanel from the first example. It’s got a small margin to separate it from the textbox a little. <Controls:ValidationSummary Margin="8"/> The ValidationSummary control has to be notified that an ValidationException occurred. This can be done with a small change to the xaml too. Add the NotifyOnValidationError to the binding expression. By default this value is set to false, so nothing would be notified. Set the property to true to get it to work. <TextBox Width="150" x:Name="Name" Text="{Binding Name, Mode=TwoWay, ValidatesOnExceptions=True, NotifyOnValidationError=True}"/> Data annotation Validating data in the setter is one option, but not my personal favorite. It’s the easiest way if you have a single required value you want to check, but often you want to validate more. Besides, I don’t consider it best practice to write logic in setters. The way used by frameworks like WCF Ria Services is the use of attributes on the properties. Instead of throwing exceptions you have to call the static method ValidateProperty on the Validator class. This call stays always the same for a particular property, not even when you change the attributes on the property. To mark a property “Required” you can use the RequiredAttribute. This is what the Name property is going to look like: [Required] public string Name { get { return _name; } set { if (_name != value) { Validator.ValidateProperty(value, new ValidationContext(this, null, null){ MemberName = "Name" }); _name = value; if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("Name")); } } } The ValidateProperty method takes the new value for the property and an instance of ValidationContext. The properties passed to the constructor of the ValidationContextclass are very straight forward. This part is the same every time. The only thing that changes is the MemberName property of the ValidationContext. Property has to hold the name of the property you want to validate. It’s the same value you provide the PropertyChangedEventArgs with. The System.ComponentModel.DataAnnotation contains eight different validation attributes including a base class to create your own. They are: RequiredAttribute Specifies that a value must be provided. RangeAttribute The provide value must fall in the specified range. RegularExpressionAttribute Validates is the value matches the regular expression. StringLengthAttribute Checks if the number of characters in a string falls between a minimum and maximum amount. CustomValidationAttribute Use a custom method to validate the value. DataTypeAttribute Specify a data type using an enum or a custom data type. EnumDataTypeAttribute Makes sure the value is found in a enum. ValidationAttribute A base class for custom validation attributes All of these will ensure that an validation exception is thrown, except the DataTypeAttribute. This attribute is used to provide some additional information about the property. You can use this information in your own code. [Required] [Range(0,125,ErrorMessage = "Value is not a valid age")] public int Age { It’s no problem to stack different validation attributes together. For example, when an Age is required and must fall in the range from 0 to 125: [Required, StringLength(255,MinimumLength = 3)] public string Name { Or in one row like this, for a required Name with at least 3 characters and a maximum of 255: Delayed validation Having properties marked as required can be very useful. The only downside to the technique described earlier is that you have to change the value in order to get it validated. What if you start out with empty an empty entry form? All fields are empty and thus won’t be validated. With this small trick you can validate at the moment the user click the submit button. <TextBox Width="150" x:Name="NameField" Text="{Binding Name, Mode=TwoWay, ValidatesOnExceptions=True, NotifyOnValidationError=True, UpdateSourceTrigger=Explicit}"/> By default, when a TwoWay bound control looses focus the value is updated. When you added validation like I’ve shown you earlier, the value is validated. To overcome this, you have to tell the binding update explicitly by setting the UpdateSourceTrigger binding property to Explicit: private void SubmitButtonClick(object sender, RoutedEventArgs e) { NameField.GetBindingExpression(TextBox.TextProperty).UpdateSource(); } This way, the binding is in two direction but the source is only updated, thus validated, when you tell it to. In the code behind you have to call the UpdateSource method on the binding expression, which you can get from the TextBox. Conclusion Data validation is something you’ll probably want on almost every entry form. I always thought it was hard to do, but it wasn’t. If you can throw an exception you can do validation. If you want to know anything more in depth about something I talked about in this article let me know. I might write an entire post to that.

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C#/.NET Little Wonders: Interlocked Read() and Exchange()

- by James Michael Hare

Once again, in this series of posts I look at the parts of the .NET Framework that may seem trivial, but can help improve your code by making it easier to write and maintain. The index of all my past little wonders posts can be found here. Last time we discussed the Interlocked class and its Add(), Increment(), and Decrement() methods which are all useful for updating a value atomically by adding (or subtracting). However, this begs the question of how do we set and read those values atomically as well? Read() – Read a value atomically Let’s begin by examining the following code: 1: public class Incrementor 2: { 3: private long _value = 0; 4: 5: public long Value { get { return _value; } } 6: 7: public void Increment() 8: { 9: Interlocked.Increment(ref _value); 10: } 11: } 12: It uses an interlocked increment, as we discuss in my previous post (here), so we know that the increment will be thread-safe. But, to realize what’s potentially wrong we have to know a bit about how atomic reads are in 32 bit and 64 bit .NET environments. When you are dealing with an item smaller or equal to the system word size (such as an int on a 32 bit system or a long on a 64 bit system) then the read is generally atomic, because it can grab all of the bits needed at once. However, when dealing with something larger than the system word size (reading a long on a 32 bit system for example), it cannot grab the whole value at once, which can lead to some problems since this read isn’t atomic. For example, this means that on a 32 bit system we may read one half of the long before another thread increments the value, and the other half of it after the increment. To protect us from reading an invalid value in this manner, we can do an Interlocked.Read() to force the read to be atomic (of course, you’d want to make sure any writes or increments are atomic also): 1: public class Incrementor 2: { 3: private long _value = 0; 4: 5: public long Value 6: { 7: get { return Interlocked.Read(ref _value); } 8: } 9: 10: public void Increment() 11: { 12: Interlocked.Increment(ref _value); 13: } 14: } Now we are guaranteed that we will read the 64 bit value atomically on a 32 bit system, thus ensuring our thread safety (assuming all other reads, writes, increments, etc. are likewise protected). Note that as stated before, and according to the MSDN (here), it isn’t strictly necessary to use Interlocked.Read() for reading 64 bit values on 64 bit systems, but for those still working in 32 bit environments, it comes in handy when dealing with long atomically. Exchange() – Exchanges two values atomically Exchange() lets us store a new value in the given location (the ref parameter) and return the old value as a result. So just as Read() allows us to read atomically, one use of Exchange() is to write values atomically. For example, if we wanted to add a Reset() method to our Incrementor, we could do something like this: 1: public void Reset() 2: { 3: _value = 0; 4: } But the assignment wouldn’t be atomic on 32 bit systems, since the word size is 32 bits and the variable is a long (64 bits). Thus our assignment could have only set half the value when a threaded read or increment happens, which would put us in a bad state. So instead, we could write Reset() like this: 1: public void Reset() 2: { 3: Interlocked.Exchange(ref _value, 0); 4: } And we’d be safe again on a 32 bit system. But this isn’t the only reason Exchange() is valuable. The key comes in realizing that Exchange() doesn’t just set a new value, it returns the old as well in an atomic step. Hence the name “exchange”: you are swapping the value to set with the stored value. So why would we want to do this? Well, anytime you want to set a value and take action based on the previous value. An example of this might be a scheme where you have several tasks, and during every so often, each of the tasks may nominate themselves to do some administrative chore. Perhaps you don’t want to make this thread dedicated for whatever reason, but want to be robust enough to let any of the threads that isn’t currently occupied nominate itself for the job. An easy and lightweight way to do this would be to have a long representing whether someone has acquired the “election” or not. So a 0 would indicate no one has been elected and 1 would indicate someone has been elected. We could then base our nomination strategy as follows: every so often, a thread will attempt an Interlocked.Exchange() on the long and with a value of 1. The first thread to do so will set it to a 1 and return back the old value of 0. We can use this to show that they were the first to nominate and be chosen are thus “in charge”. Anyone who nominates after that will attempt the same Exchange() but will get back a value of 1, which indicates that someone already had set it to a 1 before them, thus they are not elected. Then, the only other step we need take is to remember to release the election flag once the elected thread accomplishes its task, which we’d do by setting the value back to 0. In this way, the next thread to nominate with Exchange() will get back the 0 letting them know they are the new elected nominee. Such code might look like this: 1: public class Nominator 2: { 3: private long _nomination = 0; 4: public bool Elect() 5: { 6: return Interlocked.Exchange(ref _nomination, 1) == 0; 7: } 8: public bool Release() 9: { 10: return Interlocked.Exchange(ref _nomination, 0) == 1; 11: } 12: } There’s many ways to do this, of course, but you get the idea. Running 5 threads doing some “sleep” work might look like this: 1: var nominator = new Nominator(); 2: var random = new Random(); 3: Parallel.For(0, 5, i => 4: { 5: 6: for (int j = 0; j < _iterations; ++j) 7: { 8: if (nominator.Elect()) 9: { 10: // elected 11: Console.WriteLine("Elected nominee " + i); 12: Thread.Sleep(random.Next(100, 5000)); 13: nominator.Release(); 14: } 15: else 16: { 17: // not elected 18: Console.WriteLine("Did not elect nominee " + i); 19: } 20: // sleep before check again 21: Thread.Sleep(1000); 22: } 23: }); And would spit out results like: 1: Elected nominee 0 2: Did not elect nominee 2 3: Did not elect nominee 1 4: Did not elect nominee 4 5: Did not elect nominee 3 6: Did not elect nominee 3 7: Did not elect nominee 1 8: Did not elect nominee 2 9: Did not elect nominee 4 10: Elected nominee 3 11: Did not elect nominee 2 12: Did not elect nominee 1 13: Did not elect nominee 4 14: Elected nominee 0 15: Did not elect nominee 2 16: Did not elect nominee 4 17: ... Another nice thing about the Interlocked.Exchange() is it can be used to thread-safely set pretty much anything 64 bits or less in size including references, pointers (in unsafe mode), floats, doubles, etc. Summary So, now we’ve seen two more things we can do with Interlocked: reading and exchanging a value atomically. Read() and Exchange() are especially valuable for reading/writing 64 bit values atomically in a 32 bit system. Exchange() has value even beyond simply atomic writes by using the Exchange() to your advantage, since it reads and set the value atomically, which allows you to do lightweight nomination systems. There’s still a few more goodies in the Interlocked class which we’ll explore next time! Technorati Tags: C#,CSharp,.NET,Little Wonders,Interlocked

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Exception while exposing a bean in webservice using spring mvc

- by Ajay

Hi, I am using Spring 3.0.5.Release MVC for exposing a webservice and below is my servlet.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">  <context:component-scan base-package="com.pyramid.qls.progressReporter.service" /> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="marshallingConverter" /> <ref bean="atomConverter" /> <ref bean="jsonConverter" /> </list> </property> </bean> <bean id="marshallingConverter" class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter"> <constructor-arg ref="jaxbMarshaller" /> <property name="supportedMediaTypes" value="application/xml"/> </bean> <bean id="atomConverter" class="org.springframework.http.converter.feed.AtomFeedHttpMessageConverter"> <property name="supportedMediaTypes" value="application/atom+xml" /> </bean> <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> <property name="supportedMediaTypes" value="application/json" /> </bean>  <bean id="restTemplate" class="org.springframework.web.client.RestTemplate"> <property name="messageConverters"> <list> <ref bean="marshallingConverter" /> <ref bean="atomConverter" /> <ref bean="jsonConverter" /> </list> </property> </bean> <bean id="jaxbMarshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller"> <property name="classesToBeBound"> <list> <value>com.pyramid.qls.progressReporter.impl.BatchProgressMetricsImpl</value> <value>com.pyramid.qls.progressReporter.datatype.InstrumentStats</value> <value>com.pyramid.qls.progressReporter.datatype.InstrumentInfo</value> <value>com.pyramid.qls.progressReporter.datatype.LoadOnConsumer</value> <value>com.pyramid.qls.progressReporter.datatype.HighLevelTaskStats</value> <value>com.pyramid.qls.progressReporter.datatype.SessionStats</value> <value>com.pyramid.qls.progressReporter.datatype.TaskStats</value> <value>com.pyramid.qls.progressReporter.datatype.ComputeStats</value> <value>com.pyramid.qls.progressReporter.datatype.DetailedInstrumentStats</value> <value>com.pyramid.qls.progressReporter.datatype.ImntHistoricalStats</value> </list> </property> </bean> <bean id="QPRXmlView" class="org.springframework.web.servlet.view.xml.MarshallingView"> <constructor-arg ref="jaxbMarshaller" /> </bean> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> <property name="mediaTypes"> <map> <entry key="xml" value="application/xml"/> <entry key="html" value="text/html"/> </map> </property> <property name="viewResolvers"> <list> <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> </list> </property> </bean> <bean id="QPRController" class="com.pyramid.qls.progressReporter.service.QPRController"> <property name="jaxb2Mashaller" ref="jaxbMarshaller" /> </bean> </beans> Following is what i am doing in controller (QPRController) @RequestMapping(value = "/clientMetrics/{clientId}", method = RequestMethod.GET) public ModelAndView getBatchProgressMetrics(@PathVariable String clientId) { List<BatchProgressMetrics> batchProgressMetricsList = null; batchProgressMetricsList = batchProgressReporter.getBatchProgressMetricsForClient(clientId); ModelAndView mav = new ModelAndView("QPRXmlView", BindingResult.MODEL_KEY_PREFIX + "batchProgressMetrics", batchProgressMetricsList); return mav; } And i get the following: SEVERE: Servlet.service() for servlet rest threw exception javax.servlet.ServletException: Unable to locate object to be marshalled in model: {org.springframework.validation.BindingResult.batchProgressMetrics= Note that BatchProgressMetrics is an interface so my MAV is returning list of BatchProgressMetrics objects and i have entry for its impl in classes to be bound in servlet.xml. Can you please help me as to what i am doing wrong. And yes if i send just batchProgressMetricsList.get(0) in MAV it just works fine.

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Table not Echoing out if another Table has a Zero value

- by John

Hello, The table below with mysql_query($sqlStr3) (the one with the word "Joined" in its row) does not echo if the result associated with mysql_query($sqlStr1) has a value of zero. This happens even if mysql_query($sqlStr3) returns a result. In other words, if a given loginid has an entry in the table "login", but not one in the table "submission", then the table associated with mysql_query($sqlStr3) does not echo. I don't understand why the "submission" table would have any effect on mysql_query($sqlStr3), since the $sqlStr3 only deals with another table, called "login", as seen below. Any ideas why this is happening? Thanks in advance, John W. <?php echo '<div class="profilename">User Profile for </div>'; echo '<div class="profilename2">'.$profile.'</div>'; $tzFrom = new DateTimeZone('America/New_York'); $tzTo = new DateTimeZone('America/Phoenix'); $profile = mysql_real_escape_string($_GET['profile']); $sqlStr = "SELECT l.username, l.loginid, s.loginid, s.submissionid, s.title, s.url, s.datesubmitted, s.displayurl FROM submission AS s INNER JOIN login AS l ON s.loginid = l.loginid WHERE l.username = '$profile' ORDER BY s.datesubmitted DESC"; $result = mysql_query($sqlStr); $arr = array(); echo "<table class=\"samplesrec1\">"; while ($row = mysql_fetch_array($result)) { $dt = new DateTime($row["datesubmitted"], $tzFrom); $dt->setTimezone($tzTo); echo '<tr>'; echo '<td class="sitename3">'.$dt->format('F j, Y &\nb\sp &\nb\sp g:i a').'</a></td>'; echo '<td class="sitename1"><a href="http://www.'.$row["url"].'">'.$row["title"].'</a></td>'; echo '</tr>'; } echo "</table>"; $sqlStr1 = "SELECT l.username, l.loginid, s.loginid, s.submissionid, s.title, s.url, s.datesubmitted, s.displayurl, l.created, count(s.submissionid) countSubmissions FROM submission AS s INNER JOIN login AS l ON s.loginid = l.loginid WHERE l.username = '$profile'"; $result1 = mysql_query($sqlStr1); $arr1 = array(); echo "<table class=\"samplesrec2\">"; while ($row1 = mysql_fetch_array($result1)) { echo '<tr>'; echo '<td class="sitename5">Submissions:      '.$row1["countSubmissions"].'</td>'; echo '</tr>'; } echo "</table>"; $sqlStr2 = "SELECT l.username, l.loginid, c.loginid, c.commentid, c.submissionid, c.comment, c.datecommented, l.created, count(c.commentid) countComments FROM comment AS c INNER JOIN login AS l ON c.loginid = l.loginid WHERE l.username = '$profile'"; $result2 = mysql_query($sqlStr2); $arr2 = array(); echo "<table class=\"samplesrec3\">"; while ($row2 = mysql_fetch_array($result2)) { echo '<tr>'; echo '<td class="sitename5">Comments:          '.$row2["countComments"].'</td>'; echo '</tr>'; } echo "</table>"; $tzFrom3 = new DateTimeZone('America/New_York'); $tzTo3 = new DateTimeZone('America/Phoenix'); $sqlStr3 = "SELECT created, username FROM login WHERE username = '$profile'"; $result3 = mysql_query($sqlStr3); $arr3 = array(); echo "<table class=\"samplesrec4\">"; while ($row3 = mysql_fetch_array($result3)) { $dt3 = new DateTime($row3["created"], $tzFrom3); $dt3->setTimezone($tzTo3); echo '<tr>'; echo '<td class="sitename5">Joined:                  '.$dt->format('F j, Y').'</td>'; echo '</tr>'; } echo "</table>"; ?> </body> </html>

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get iframe property and content

- by zeroSeven

is there a way to get the iframe properties and content and be able to display it? example: type it as Rich Text Editor on the iframe and it will be displayed as<b>Rich Text Editor</b> on some part of the page. Rich Text Editor == <b>Rich Text Editor</b> thank you in advance. <html> <head> <title>Rich Text Editor</title> </head> <script type="text/javascript"> function def() { document.getElementById("textEditor").contentWindow.document.designMode="on"; textEditor.document.open(); textEditor.document.write('<head><style type="text/css">body{ font-family:arial; font-size:13px;}</style></head>'); textEditor.document.close(); document.getElementById("fonts").selectedIndex=0; document.getElementById("size").selectedIndex=1; document.getElementById("color").selectedIndex=0; } function fontEdit(x,y) { document.getElementById("textEditor").contentWindow.document.execCommand(x,"",y); textEditor.focus(); } </script> <body onLoad="def()"> <center> <div style="width:500px; text-align:left; margin-bottom:10px "> <input type="button" id="bold" style="height:21px; width:21px; font-weight:bold;" value="B" onClick="fontEdit('bold')" /> <input type="button" id="italic" style="height:21px; width:21px; font-style:italic;" value="I" onClick="fontEdit('italic')" /> <input type="button" id="underline" style="height:21px; width:21px; text-decoration:underline;" value="U" onClick="fontEdit('underline')" /> | <input type="button" style="height:21px; width:21px;"value="L" onClick="fontEdit('justifyleft')" title="align left" /> <input type="button" style="height:21px; width:21px;"value="C" onClick="fontEdit('justifycenter')" title="center" /> <input type="button" style="height:21px; width:21px;"value="R" onClick="fontEdit('justifyright')" title="align right" /> | <select id="fonts" onChange="fontEdit('fontname',this[this.selectedIndex].value)"> <option value="Arial">Arial</option> <option value="Comic Sans MS">Comic Sans MS</option> <option value="Courier New">Courier New</option> <option value="Monotype Corsiva">Monotype</option> <option value="Tahoma">Tahoma</option> <option value="Times">Times</option> </select> <select id="size" onChange="fontEdit('fontsize',this[this.selectedIndex].value)"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> <select id="color" onChange="fontEdit('ForeColor',this[this.selectedIndex].value)"> <option value="black">-</option> <option style="color:red;" value="red">-</option> <option style="color:blue;" value="blue">-</option> <option style="color:green;" value="green">-</option> <option style="color:pink;" value="pink">-</option> </select> | <input type="button" style="height:21px; width:21px;"value="1" onClick="fontEdit('insertorderedlist')" title="Numbered List" /> <input type="button" style="height:21px; width:21px;"value="?" onClick="fontEdit('insertunorderedlist')" title="Bullets List" /> <input type="button" style="height:21px; width:21px;"value="?" onClick="fontEdit('outdent')" title="Outdent" /> <input type="button" style="height:21px; width:21px;"value="?" onClick="fontEdit('indent')" title="Indent" /> </div> <iframe id="textEditor" style="width:500px; height:170px;"> </iframe> </center> </body>

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TFS API Change WorkItem CreatedDate And ChangedDate To Historic Dates

- by Tarun Arora

There may be times when you need to modify the value of the fields “System.CreatedDate” and “System.ChangedDate” on a work item. Richard Hundhausen has a great blog with ample of reason why or why not you should need to set the values of these fields to historic dates. In this blog post I’ll show you, Create a PBI WorkItem linked to a Task work item by pre-setting the value of the field ‘System.ChangedDate’ to a historic date Change the value of the field ‘System.Created’ to a historic date Simulate the historic burn down of a task type work item in a sprint Explain the impact of updating values of the fields CreatedDate and ChangedDate on the Sprint burn down chart Rules of Play 1. You need to be a member of the Project Collection Service Accounts 2. You need to use ‘WorkItemStoreFlags.BypassRules’ when you instantiate the WorkItemStore service // Instanciate Work Item Store with the ByPassRules flag _wis = new WorkItemStore(_tfs, WorkItemStoreFlags.BypassRules); 3. You cannot set the ChangedDate - Less than the changed date of previous revision - Greater than current date Walkthrough The walkthrough contains 5 parts 00 – Required References 01 – Connect to TFS Programmatically 02 – Create a Work Item Programmatically 03 – Set the values of fields ‘System.ChangedDate’ and ‘System.CreatedDate’ to historic dates 04 – Results of our experiment Lets get started………………………………………………… 00 – Required References Microsoft.TeamFoundation.dll Microsoft.TeamFoundation.Client.dll Microsoft.TeamFoundation.Common.dll Microsoft.TeamFoundation.WorkItemTracking.Client.dll 01 – Connect to TFS Programmatically I have a in depth blog post on how to connect to TFS programmatically in case you are interested. However, the code snippet below will enable you to connect to TFS using the Team Project Picker. // Services I need access to globally private static TfsTeamProjectCollection _tfs; private static ProjectInfo _selectedTeamProject; private static WorkItemStore _wis; // Connect to TFS Using Team Project Picker public static bool ConnectToTfs() { var isSelected = false; // The user is allowed to select only one project var tfsPp = new TeamProjectPicker(TeamProjectPickerMode.SingleProject, false); tfsPp.ShowDialog(); // The TFS project collection _tfs = tfsPp.SelectedTeamProjectCollection; if (tfsPp.SelectedProjects.Any()) { // The selected Team Project _selectedTeamProject = tfsPp.SelectedProjects[0]; isSelected = true; } return isSelected; } 02 – Create a Work Item Programmatically In the below code snippet I have create a Product Backlog Item and a Task type work item and then link them together as parent and child. Note – You will have to set the ChangedDate to a historic date when you created the work item. Remember, If you try and set the ChangedDate to a value earlier than last assigned you will receive the following exception… TF26212: Team Foundation Server could not save your changes. There may be problems with the work item type definition. Try again or contact your Team Foundation Server administrator. If you notice below I have added a few seconds each time I have modified the ‘ChangedDate’ just to avoid running into the exception listed above. // Create Linked Work Items and return Ids private static List<int> CreateWorkItemsProgrammatically() { // Instantiate Work Item Store with the ByPassRules flag _wis = new WorkItemStore(_tfs, WorkItemStoreFlags.BypassRules); // List of work items to return var listOfWorkItems = new List<int>(); // Create a new Product Backlog Item var p = new WorkItem(_wis.Projects[_selectedTeamProject.Name].WorkItemTypes["Product Backlog Item"]); p.Title = "This is a new PBI"; p.Description = "Description"; p.IterationPath = string.Format("{0}\\Release 1\\Sprint 1", _selectedTeamProject.Name); p.AreaPath = _selectedTeamProject.Name; p["Effort"] = 10; // Just double checking that ByPassRules is set to true if (_wis.BypassRules) { p.Fields["System.ChangedDate"].Value = Convert.ToDateTime("2012-01-01"); } if (p.Validate().Count == 0) { p.Save(); listOfWorkItems.Add(p.Id); } else { Console.WriteLine(">> Following exception(s) encountered during work item save: "); foreach (var e in p.Validate()) { Console.WriteLine(" - '{0}' ", e); } } var t = new WorkItem(_wis.Projects[_selectedTeamProject.Name].WorkItemTypes["Task"]); t.Title = "This is a task"; t.Description = "Task Description"; t.IterationPath = string.Format("{0}\\Release 1\\Sprint 1", _selectedTeamProject.Name); t.AreaPath = _selectedTeamProject.Name; t["Remaining Work"] = 10; if (_wis.BypassRules) { t.Fields["System.ChangedDate"].Value = Convert.ToDateTime("2012-01-01"); } if (t.Validate().Count == 0) { t.Save(); listOfWorkItems.Add(t.Id); } else { Console.WriteLine(">> Following exception(s) encountered during work item save: "); foreach (var e in t.Validate()) { Console.WriteLine(" - '{0}' ", e); } } var linkTypEnd = _wis.WorkItemLinkTypes.LinkTypeEnds["Child"]; p.Links.Add(new WorkItemLink(linkTypEnd, t.Id) {ChangedDate = Convert.ToDateTime("2012-01-01").AddSeconds(20)}); if (_wis.BypassRules) { p.Fields["System.ChangedDate"].Value = Convert.ToDateTime("2012-01-01").AddSeconds(20); } if (p.Validate().Count == 0) { p.Save(); } else { Console.WriteLine(">> Following exception(s) encountered during work item save: "); foreach (var e in p.Validate()) { Console.WriteLine(" - '{0}' ", e); } } return listOfWorkItems; } 03 – Set the value of “Created Date” and Change the value of “Changed Date” to Historic Dates The CreatedDate can only be changed after a work item has been created. If you try and set the CreatedDate to a historic date at the time of creation of a work item, it will not work. // Lets do a work item effort burn down simulation by updating the ChangedDate & CreatedDate to historic Values private static void WorkItemChangeSimulation(IEnumerable<int> listOfWorkItems) { foreach (var id in listOfWorkItems) { var wi = _wis.GetWorkItem(id); switch (wi.Type.Name) { case "ProductBacklogItem": if (wi.State.ToLower() == "new") wi.State = "Approved"; // Advance the changed date by few seconds wi.Fields["System.ChangedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); // Set the CreatedDate to Changed Date wi.Fields["System.CreatedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); wi.Save(); break; case "Task": // Advance the changed date by few seconds wi.Fields["System.ChangedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); // Set the CreatedDate to Changed date wi.Fields["System.CreatedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); wi.Save(); break; } } // A mock sprint start date var sprintStart = DateTime.Today.AddDays(-5); // A mock sprint end date var sprintEnd = DateTime.Today.AddDays(5); // What is the total Sprint duration var totalSprintDuration = (sprintEnd - sprintStart).Days; // How much of the sprint have we already covered var noOfDaysIntoSprint = (DateTime.Today - sprintStart).Days; // Get the effort assigned to our tasks var totalEffortRemaining = QueryTaskTotalEfforRemaining(listOfWorkItems); // Defining how much effort to burn every day decimal dailyBurnRate = totalEffortRemaining / totalSprintDuration < 1 ? 1 : totalEffortRemaining / totalSprintDuration; // we have just created one task var totalNoOfTasks = 1; var simulation = sprintStart; var currentDate = DateTime.Today.Date; // Carry on till effort has been burned down from sprint start to today while (simulation.Date != currentDate.Date) { var dailyBurnRate1 = dailyBurnRate; // A fixed amount needs to be burned down each day while (dailyBurnRate1 > 0) { // burn down bit by bit from all unfinished task type work items foreach (var id in listOfWorkItems) { var wi = _wis.GetWorkItem(id); var isDirty = false; // Set the status to in progress if (wi.State.ToLower() == "to do") { wi.State = "In Progress"; isDirty = true; } // Ensure that there is enough effort remaining in tasks to burn down the daily burn rate if (QueryTaskTotalEfforRemaining(listOfWorkItems) > dailyBurnRate1) { // If there is less than 1 unit of effort left in the task, burn it all if (Convert.ToDecimal(wi["Remaining Work"]) <= 1) { wi["Remaining Work"] = 0; dailyBurnRate1 = dailyBurnRate1 - Convert.ToDecimal(wi["Remaining Work"]); isDirty = true; } else { // How much to burn from each task? var toBurn = (dailyBurnRate / totalNoOfTasks) < 1 ? 1 : (dailyBurnRate / totalNoOfTasks); // Check that the task has enough effort to allow burnForTask effort if (Convert.ToDecimal(wi["Remaining Work"]) >= toBurn) { wi["Remaining Work"] = Convert.ToDecimal(wi["Remaining Work"]) - toBurn; dailyBurnRate1 = dailyBurnRate1 - toBurn; isDirty = true; } else { wi["Remaining Work"] = 0; dailyBurnRate1 = dailyBurnRate1 - Convert.ToDecimal(wi["Remaining Work"]); isDirty = true; } } } else { dailyBurnRate1 = 0; } if (isDirty) { if (Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).Date == simulation.Date) { wi.Fields["System.ChangedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(20); } else { wi.Fields["System.ChangedDate"].Value = simulation.AddSeconds(20); } wi.Save(); } } } // Increase date by 1 to perform daily burn down by day simulation = Convert.ToDateTime(simulation).AddDays(1); } } // Get the Total effort remaining in the current sprint private static decimal QueryTaskTotalEfforRemaining(List<int> listOfWorkItems) { var unfinishedWorkInCurrentSprint = _wis.GetQueryDefinition( new Guid(QueryAndGuid.FirstOrDefault(c => c.Key == "Unfinished Work").Value)); var parameters = new Dictionary<string, object> { { "project", _selectedTeamProject.Name } }; var q = new Query(_wis, unfinishedWorkInCurrentSprint.QueryText, parameters); var results = q.RunLinkQuery(); var wis = new List<WorkItem>(); foreach (var result in results) { var _wi = _wis.GetWorkItem(result.TargetId); if (_wi.Type.Name == "Task" && listOfWorkItems.Contains(_wi.Id)) wis.Add(_wi); } return wis.Sum(r => Convert.ToDecimal(r["Remaining Work"])); } 04 – The Results If you are still reading, the results are beautiful! Image 1 – Create work item with Changed Date pre-set to historic date Image 2 – Set the CreatedDate to historic date (Same as the ChangedDate) Image 3 – Simulate of effort burn down on a task via the TFS API Image 4 – The history of changes on the Task. So, essentially this task has burned 1 hour per day Sprint Burn Down Chart – What’s not possible? The Sprint burn down chart is calculated from the System.AuthorizedDate and not the System.ChangedDate/System.CreatedDate. So, though you can change the System.ChangedDate and System.CreatedDate to historic dates you will not be able to synthesize the sprint burn down chart. Image 1 – By changing the Created Date and Changed Date to ‘18/Oct/2012’ you would have expected the burn down to have been impacted, but it won’t be, because the sprint burn down chart uses the value of field ‘System.AuthorizedDate’ to calculate the unfinished work points. The AsOf queries that are used to calculate the unfinished work points use the value of the field ‘System.AuthorizedDate’. Image 2 – Using the above code I burned down 1 hour effort per day over 5 days from the task work item, I would have expected the sprint burn down to show a constant burn down, instead the burn down shows the effort exhausted on the 24th itself. Simply because the burn down is calculated using the ‘System.AuthorizedDate’. Now you would ask… “Can I change the value of the field System.AuthorizedDate to a historic date” Unfortunately that’s not possible! You will run into the exception ValidationException – “TF26194: The value for field ‘Authorized Date’ cannot be changed.” Conclusion - You need to be a member of the Project Collection Service account group in order to set the fields ‘System.ChangedDate’ and ‘System.CreatedDate’ to historic dates - You need to instantiate the WorkItemStore using the flag ByPassValidation - The System.ChangedDate needs to be set to a historic date at the time of work item creation. You cannot reset the ChangedDate to a date earlier than the existing ChangedDate and you cannot reset the ChangedDate to a date greater than the current date time. - The System.CreatedDate can only be reset after a work item has been created. You cannot set the CreatedDate at the time of work item creation. The CreatedDate cannot be greater than the current date. You can however reset the CreatedDate to a date earlier than the existing value. - You will not be able to synthesize the Sprint burn down chart by changing the value of System.ChangedDate and System.CreatedDate to historic dates, since the burn down chart uses AsOf queries to calculate the unfinished work points which internally uses the System.AuthorizedDate and NOT the System.ChangedDate & System.CreatedDate - System.AuthorizedDate cannot be set to a historic date using the TFS API Read other posts on using the TFS API here… Enjoy!

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C#: No value given for one or more required parameter with FormView

- by Vinzcent

Hey, I am using a FormView and when I want to update something I have edited, I always get this error: No value given for one or more required parameters. I use a SQLDataSource in combination with a FormView This is the code of my SQLDataSource <asp:SqlDataSource ID="sqldsLokaalPrinters" runat="server" ConnectionString="<%$ ConnectionStrings:connRand2 %>" DeleteCommand="DELETE FROM [tblComputers] WHERE (([tblArtveldenr] = ?) OR ([tblArtveldenr] IS NULL AND ? IS NULL))" InsertCommand="INSERT INTO [tblComputers] ([tblArtveldenr], [tblNaam], [tblCLokaal_id], [tblPositie], [tblSerienr], [tblTCPIP], [tblFabrikant], [tblModel], [tblProcessor], [tblSnelheid], [tblKleur], [tblGeheugen], [tblHarddisk], [tblZip], [tblCD], [tblDVD], [tblNetwerk], [tblFirewire], [tblAanschafdatum], [tblCLeverabcierNr], [tblScherm], [tblLaptop]) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)" ProviderName="<%$ ConnectionStrings:connRand2.ProviderName %>" SelectCommand="SELECT * FROM [tblComputers] WHERE ([tblCLokaal_id] = ?)" UpdateCommand="UPDATE [tblComputers] SET [tblNaam] = ?, [tblCLokaal_id] = ?, [tblPositie] = ?, [tblSerienr] = ?, [tblTCPIP] = ?, [tblFabrikant] = ?, [tblModel] = ?, [tblProcessor] = ?, [tblSnelheid] = ?, [tblKleur] = ?, [tblGeheugen] = ?, [tblHarddisk] = ?, [tblZip] = ?, [tblCD] = ?, [tblDVD] = ?, [tblNetwerk] = ?, [tblFirewire] = ?, [tblAanschafdatum] = ?, [tblCLeverabcierNr] = ?, [tblScherm] = ?, [tblLaptop] = ? WHERE (([tblArtveldenr] = ?) OR ([tblArtveldenr] IS NULL AND ? IS NULL))"> <SelectParameters> <asp:SessionParameter Name="tblCLokaal_id" SessionField="lokaalID" Type="Int16" /> </SelectParameters> <DeleteParameters> <asp:Parameter Name="tblArtveldenr" Type="String" /> </DeleteParameters> <UpdateParameters> <asp:Parameter Name="tblNaam" Type="String" /> <asp:Parameter Name="tblCLokaal_id" Type="Int16" /> <asp:Parameter Name="tblPositie" Type="Int32" /> <asp:Parameter Name="tblSerienr" Type="String" /> <asp:Parameter Name="tblTCPIP" Type="String" /> <asp:Parameter Name="tblFabrikant" Type="String" /> <asp:Parameter Name="tblModel" Type="String" /> <asp:Parameter Name="tblProcessor" Type="String" /> <asp:Parameter Name="tblSnelheid" Type="Int32" /> <asp:Parameter Name="tblKleur" Type="String" /> <asp:Parameter Name="tblGeheugen" Type="Int32" /> <asp:Parameter Name="tblHarddisk" Type="Double" /> <asp:Parameter Name="tblZip" Type="String" /> <asp:Parameter Name="tblCD" Type="String" /> <asp:Parameter Name="tblDVD" Type="String" /> <asp:Parameter Name="tblNetwerk" Type="String" /> <asp:Parameter Name="tblFirewire" Type="Int32" /> <asp:Parameter Name="tblAanschafdatum" Type="DateTime" /> <asp:Parameter Name="tblCLeverabcierNr" Type="Int32" /> <asp:Parameter Name="tblScherm" Type="String" /> <asp:Parameter Name="tblLaptop" Type="Boolean" /> <asp:Parameter Name="tblArtveldenr" Type="String" /> </UpdateParameters> <InsertParameters> <asp:Parameter Name="tblArtveldenr" Type="String" /> <asp:Parameter Name="tblNaam" Type="String" /> <asp:Parameter Name="tblCLokaal_id" Type="Int16" /> <asp:Parameter Name="tblPositie" Type="Int32" /> <asp:Parameter Name="tblSerienr" Type="String" /> <asp:Parameter Name="tblTCPIP" Type="String" /> <asp:Parameter Name="tblFabrikant" Type="String" /> <asp:Parameter Name="tblModel" Type="String" /> <asp:Parameter Name="tblProcessor" Type="String" /> <asp:Parameter Name="tblSnelheid" Type="Int32" /> <asp:Parameter Name="tblKleur" Type="String" /> <asp:Parameter Name="tblGeheugen" Type="Int32" /> <asp:Parameter Name="tblHarddisk" Type="Double" /> <asp:Parameter Name="tblZip" Type="String" /> <asp:Parameter Name="tblCD" Type="String" /> <asp:Parameter Name="tblDVD" Type="String" /> <asp:Parameter Name="tblNetwerk" Type="String" /> <asp:Parameter Name="tblFirewire" Type="Int32" /> <asp:Parameter Name="tblAanschafdatum" Type="DateTime" /> <asp:Parameter Name="tblCLeverabcierNr" Type="Int32" /> <asp:Parameter Name="tblScherm" Type="String" /> <asp:Parameter Name="tblLaptop" Type="Boolean" /> </InsertParameters> </asp:SqlDataSource> This is the code of my FormView <asp:FormView ID="FormView1" runat="server" AllowPaging="True" DataKeyNames="tblArtveldenr" DataSourceID="sqldsLokaalPrinters"> <EditItemTemplate> tblPositie: <asp:TextBox ID="tblPositieTextBox" runat="server" Text='<%# Bind("tblPositie") %>' /> <br /> tblSerienr: <asp:TextBox ID="tblSerienrTextBox" runat="server" Text='<%# Bind("tblSerienr") %>' /> <br /> tblFabrikant: <asp:TextBox ID="tblFabrikantTextBox" runat="server" Text='<%# Bind("tblFabrikant") %>' /> <br /> tblModel: <asp:TextBox ID="tblModelTextBox" runat="server" Text='<%# Bind("tblModel") %>' /> <br /> tblSnelheid: <asp:TextBox ID="tblSnelheidTextBox" runat="server" Text='<%# Bind("tblSnelheid") %>' /> <br /> tblHarddisk: <asp:TextBox ID="tblHarddiskTextBox" runat="server" Text='<%# Bind("tblHarddisk") %>' /> <br /> tblCD: <asp:TextBox ID="tblCDTextBox" runat="server" Text='<%# Bind("tblCD") %>' /> <br /> tblDVD: <asp:TextBox ID="tblDVDTextBox" runat="server" Text='<%# Bind("tblDVD") %>' /> <br /> tblAanschafdatum: <asp:TextBox ID="tblAanschafdatumTextBox" runat="server" Text='<%# Bind("tblAanschafdatum") %>' /> <br /> <asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True" CommandName="Update" Text="Update" />  <asp:LinkButton ID="UpdateCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" /> </EditItemTemplate> <InsertItemTemplate> tblPositie: <asp:TextBox ID="tblPositieTextBox" runat="server" Text='<%# Bind("tblPositie") %>' /> <br /> tblSerienr: <asp:TextBox ID="tblSerienrTextBox" runat="server" Text='<%# Bind("tblSerienr") %>' /> <br /> tblFabrikant: <asp:TextBox ID="tblFabrikantTextBox" runat="server" Text='<%# Bind("tblFabrikant") %>' /> <br /> tblModel: <asp:TextBox ID="tblModelTextBox" runat="server" Text='<%# Bind("tblModel") %>' /> <br /> tblSnelheid: <asp:TextBox ID="tblSnelheidTextBox" runat="server" Text='<%# Bind("tblSnelheid") %>' /> <br /> tblHarddisk: <asp:TextBox ID="tblHarddiskTextBox" runat="server" Text='<%# Bind("tblHarddisk") %>' /> <br /> tblCD: <asp:TextBox ID="tblCDTextBox" runat="server" Text='<%# Bind("tblCD") %>' /> <br /> tblDVD: <asp:TextBox ID="tblDVDTextBox" runat="server" Text='<%# Bind("tblDVD") %>' /> <br /> tblAanschafdatum: <asp:TextBox ID="tblAanschafdatumTextBox" runat="server" Text='<%# Bind("tblAanschafdatum") %>' /> <br /> <asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True" CommandName="Insert" Text="Insert" />  <asp:LinkButton ID="InsertCancelButton" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel" /> </InsertItemTemplate> <ItemTemplate> tblPositie: <asp:Label ID="tblPositieLabel" runat="server" Text='<%# Bind("tblPositie") %>' /> <br /> tblSerienr: <asp:Label ID="tblSerienrLabel" runat="server" Text='<%# Bind("tblSerienr") %>' /> <br /> tblFabrikant: <asp:Label ID="tblFabrikantLabel" runat="server" Text='<%# Bind("tblFabrikant") %>' /> <br /> tblModel: <asp:Label ID="tblModelLabel" runat="server" Text='<%# Bind("tblModel") %>' /> <br /> tblSnelheid: <asp:Label ID="tblSnelheidLabel" runat="server" Text='<%# Bind("tblSnelheid") %>' /> <br /> tblHarddisk: <asp:Label ID="tblHarddiskLabel" runat="server" Text='<%# Bind("tblHarddisk") %>' /> <br /> tblCD: <asp:Label ID="tblCDLabel" runat="server" Text='<%# Bind("tblCD") %>' /> <br /> tblDVD: <asp:Label ID="tblDVDLabel" runat="server" Text='<%# Bind("tblDVD") %>' /> <br /> tblAanschafdatum: <asp:Label ID="tblAanschafdatumLabel" runat="server" Text='<%# Bind("tblAanschafdatum") %>' /> <br /> <br /> <asp:LinkButton ID="EditButton" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit" />  <asp:LinkButton ID="DeleteButton" runat="server" CausesValidation="False" CommandName="Delete" Text="Delete" />  <asp:LinkButton ID="NewButton" runat="server" CausesValidation="False" CommandName="New" Text="New" /> </ItemTemplate> </asp:FormView> I have no idea how to solve this error Thanks a lot Vincent

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changing value of a textview while change in other textview by multiplying

- by sur007

Here I am getting parsed data from a URL and now I am trying to change the value of parse data to users only dynamically on an text view and my code is package com.mokshya.jsontutorial; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.HashMap; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import com.mokshya.jsontutorialhos.xmltest.R; import android.app.AlertDialog; import android.app.ListActivity; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.EditText; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast; public class Main extends ListActivity { EditText resultTxt; public double C_webuserDouble; public double C_cashDouble; public double C_transferDouble; public double S_webuserDouble; public double S_cashDouble; public double S_transferDouble; TextView cashTxtView; TextView webuserTxtView; TextView transferTxtView; TextView S_cashTxtView; TextView S_webuserTxtView; TextView S_transferTxtView; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.listplaceholder); cashTxtView = (TextView) findViewById(R.id.cashTxtView); webuserTxtView = (TextView) findViewById(R.id.webuserTxtView); transferTxtView = (TextView) findViewById(R.id.transferTxtView); S_cashTxtView = (TextView) findViewById(R.id.S_cashTxtView); S_webuserTxtView = (TextView) findViewById(R.id.S_webuserTxtView); S_transferTxtView = (TextView) findViewById(R.id.S_transferTxtView); ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); JSONObject json = JSONfunctions .getJSONfromURL("http://ldsclient.com/ftp/strtojson.php"); try { JSONArray netfoxlimited = json.getJSONArray("netfoxlimited"); for (inti = 0; i < netfoxlimited.length(); i++) { HashMap<String, String> map = new HashMap<String, String>(); JSONObject e = netfoxlimited.getJSONObject(i); map.put("date", e.getString("date")); map.put("c_web", e.getString("c_web")); map.put("c_bank", e.getString("c_bank")); map.put("c_cash", e.getString("c_cash")); map.put("s_web", e.getString("s_web")); map.put("s_bank", e.getString("s_bank")); map.put("s_cash", e.getString("s_cash")); mylist.add(map); } } catch (JSONException e) { Log.e("log_tag", "Error parsing data " + e.toString()); } ListAdapter adapter = new SimpleAdapter(this, mylist, R.layout.main, new String[] { "date", "c_web", "c_bank", "c_cash", "s_web", "s_bank", "s_cash", }, new int[] { R.id.item_title, R.id.webuserTxtView, R.id.transferTxtView, R.id.cashTxtView, R.id.S_webuserTxtView, R.id.S_transferTxtView, R.id.S_cashTxtView }); setListAdapter(adapter); final ListView lv = getListView(); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { @SuppressWarnings("unchecked") HashMap<String, String> o = (HashMap<String, String>) lv .getItemAtPosition(position); Toast.makeText(Main.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_SHORT).show(); } }); resultTxt = (EditText) findViewById(R.id.editText1); resultTxt.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { // TODO Auto-generated method stub resultTxt.setText(""); } }); resultTxt.addTextChangedListener(new TextWatcher() { public void afterTextChanged(Editable arg0) { // TODO Auto-generated method stub String text; text = resultTxt.getText().toString(); if (resultTxt.getText().length() > 5) { calculateSum(C_webuserDouble, C_cashDouble, C_transferDouble); calculateSunrise(S_webuserDouble, S_cashDouble, S_transferDouble); } else { } } public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } public void onTextChanged(CharSequence s, int start, int before, int count) { // TODO Auto-generated method stub } }); } private void calculateSum(Double webuserDouble, Double cashDouble, Double transferDouble) { String Qty; Qty = resultTxt.getText().toString(); if (Qty.length() > 0) { double QtyValue = Double.parseDouble(Qty); double cashResult; double webuserResult; double transferResult; cashResult = cashDouble * QtyValue; webuserResult = webuserDouble * QtyValue; transferResult = transferDouble * QtyValue; DecimalFormat df = new DecimalFormat("#.##"); String cashResultStr = df.format(cashResult); String webuserResultStr = df.format(webuserResult); String transferResultStr = df.format(transferResult); cashTxtView.setText(String.valueOf(cashResultStr)); webuserTxtView.setText(String.valueOf(webuserResultStr)); transferTxtView.setText(String.valueOf(transferResultStr)); // cashTxtView.setFilters(new InputFilter[] {new // DecimalDigitsInputFilter(2)}); } if (Qty.length() == 0) { cashTxtView.setText(String.valueOf(cashDouble)); webuserTxtView.setText(String.valueOf(webuserDouble)); transferTxtView.setText(String.valueOf(transferDouble)); } } private void calculateSunrise(Double webuserDouble, Double cashDouble, Double transferDouble) { String Qty; Qty = resultTxt.getText().toString(); if (Qty.length() > 0) { double QtyValue = Double.parseDouble(Qty); double cashResult; double webuserResult; double transferResult; cashResult = cashDouble * QtyValue; webuserResult = webuserDouble * QtyValue; transferResult = transferDouble * QtyValue; DecimalFormat df = new DecimalFormat("#.##"); String cashResultStr = df.format(cashResult); String webuserResultStr = df.format(webuserResult); String transferResultStr = df.format(transferResult); S_cashTxtView.setText(String.valueOf(cashResultStr)); S_webuserTxtView.setText(String.valueOf(webuserResultStr)); S_transferTxtView.setText(String.valueOf(transferResultStr)); } if (Qty.length() == 0) { S_cashTxtView.setText(String.valueOf(cashDouble)); S_webuserTxtView.setText(String.valueOf(webuserDouble)); S_transferTxtView.setText(String.valueOf(transferDouble)); } } } and I am getting following error on logcat 08-28 15:04:12.839: E/AndroidRuntime(584): Uncaught handler: thread main exiting due to uncaught exception 08-28 15:04:12.848: E/AndroidRuntime(584): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mokshya.jsontutorialhos.xmltest/com.mokshya.jsontutorial.Main}: java.lang.NullPointerException 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2401) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.access$2100(ActivityThread.java:116) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.os.Handler.dispatchMessage(Handler.java:99) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.os.Looper.loop(Looper.java:123) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.main(ActivityThread.java:4203) 08-28 15:04:12.848: E/AndroidRuntime(584): at java.lang.reflect.Method.invokeNative(Native Method) 08-28 15:04:12.848: E/AndroidRuntime(584): at java.lang.reflect.Method.invoke(Method.java:521) 08-28 15:04:12.848: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 08-28 15:04:12.848: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549) 08-28 15:04:12.848: E/AndroidRuntime(584): at dalvik.system.NativeStart.main(Native Method) 08-28 15:04:12.848: E/AndroidRuntime(584): Caused by: java.lang.NullPointerException 08-28 15:04:12.848: E/AndroidRuntime(584): at com.mokshya.jsontutorial.Main.onCreate(Main.java:111) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)

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C#: How to access an Excel cell?

- by tksy

I am trying to open an Excel file and populate its cells with data? I have done the following coding so far. Currently I am at this stage with the following code but still I am getting errors: Microsoft.Office.Interop.Excel.ApplicationClass appExcel = new Microsoft.Office.Interop.Excel.ApplicationClass(); try { // is there already such a file ? if (System.IO.File.Exists("C:\\csharp\\errorreport1.xls")) { // then go and load this into excel Microsoft.Office.Interop.Excel.Workbooks.Open( "C:\\csharp\\errorreport1.xls", true, false, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value); } else { // if not go and create a workbook: newWorkbook = appExcel.Workbooks.Add(XlWBATemplate.xlWBATWorksheet); Microsoft.Office.Interop.Excel._Worksheet excelWorksheet = (Microsoft.Office.Interop.Excel._Worksheet) newWorkBook.Worksheets.get_Item(1); } i++; j = 1; j++; objsheet.Cells(i, j).Value = "Tabelle: " + rs.Fields["Table_Name"]; j++; objsheet.Cells(i, j).Value = "kombinationsschluessel:FALL " + rs3.Fields[1].Value; j++; objsheet.Cells(i, j).Value = "Null Value: "; j++; objsheet.Cells(i, j).Value = "Updated with 888"; These are the top 2 errors I am getting: Error 1 An object reference is required for the nonstatic field, method, or property 'Microsoft.Office.Interop.Excel.Workbooks.Open(string, object, object, object, object, object, object, object, object, object, object, object, object, object, object)' Error 2 The name 'newWorkbook' does not exist in the current context

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How to retreive a array value in magento

- by Fero

For example i need to retrieve a value from this session. How should i do ? Exactly i need to get the "customer_log_id". > Array ( > [core] => Array > ( > [_session_validator_data] => Array > ( > [remote_addr] => 127.0.0.1 > [http_via] => > [http_x_forwarded_for] => > [http_user_agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 > ) > > [session_hosts] => Array > ( > [127.0.0.1] => 1 > ) > > [messages] => Mage_Core_Model_Message_Collection > Object > ( > [_messages:protected] => Array > ( > ) > > [_lastAddedMessage:protected] => > ) > > [visitor_data] => Array > ( > [] => > [server_addr] => 2130706433 > [remote_addr] => 2130706433 > [http_secure] => > [http_host] => 127.0.0.1 > [http_user_agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 > [http_accept_language] => > en-us,en;q=0.5 > [http_accept_charset] => > ISO-8859-1,utf-8;q=0.7,*;q=0.7 > [request_uri] => /currentproject/magento/index.php/customer/account/ > [session_id] => 34989ee1673caefec0d887dd41198587 > [http_referer] => http://127.0.0.1/currentproject/magento/index.php/customer/account/login/ > [first_visit_at] => 2009-12-04 11:20:24 > [is_new_visitor] => > [last_visit_at] => 2009-12-04 11:32:26 > [visitor_id] => 208 > [last_url_id] => 1399 > [catalog_compare_items_count] => 0 > [do_customer_login] => > [customer_id] => 1 > [customer_log_id] => 8 > ) > > [last_url] => http://127.0.0.1/currentproject/magento/index.php/customer/account/index/ > [just_voted_poll] => > ) > > [_cookie_revalidate] => 1259926524 > [customer_base] => Array > ( > [_session_validator_data] => Array > ( > [remote_addr] => 127.0.0.1 > [http_via] => > [http_x_forwarded_for] => > [http_user_agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 > ) > > [session_hosts] => Array > ( > [127.0.0.1] => 1 > ) > > [messages] => Mage_Core_Model_Message_Collection > Object > ( > [_messages:protected] => Array > ( > ) > > [_lastAddedMessage:protected] => > ) > > [id] => 1 > ) > > [checkout] => Array > ( > [_session_validator_data] => Array > ( > [remote_addr] => 127.0.0.1 > [http_via] => > [http_x_forwarded_for] => > [http_user_agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 > ) > > [session_hosts] => Array > ( > [127.0.0.1] => 1 > ) > > [quote_id_1] => > ) > > [catalog] => Array > ( > [_session_validator_data] => Array > ( > [remote_addr] => 127.0.0.1 > [http_via] => > [http_x_forwarded_for] => > [http_user_agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 > ) > > [session_hosts] => Array > ( > [127.0.0.1] => 1 > ) > > [messages] => Mage_Core_Model_Message_Collection > Object > ( > [_messages:protected] => Array > ( > ) > > [_lastAddedMessage:protected] => > ) > > ) > > [newsletter] => Array > ( > [_session_validator_data] => Array > ( > [remote_addr] => 127.0.0.1 > [http_via] => > [http_x_forwarded_for] => > [http_user_agent] => Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 > ) > > [session_hosts] => Array > ( > [127.0.0.1] => 1 > ) > > ) > > ) Thank n advance FEro

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