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• System.Windows.Ria.Controls and POCO

  - by jvcoach23

  I'm trying to figure out how to use POCO for silverlight use. I found an article that appears it will step me through the basics. However, it has in it a reference to the System.Windows.Ria.Controls. i don't have that on my machine.. i found System.Windows.Ria but not one that has teh control on it. I just downloaded teh RIA beta today and installed it.. so should have the latest and greatest. Anyway.. Here is the link to the article... link text and here is the code in the xaml they refer to. <UserControl x:Class="Try1Silverlight.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data" xmlns:riaControls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Ria.Controls" xmlns:domain="clr-namespace:Try1Silverlight.Web" mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480" <data:DataGrid x:Name="CustomerList" ItemsSource="{Binding Data, ElementName=CustomerSource}"> </data:DataGrid> What have i done wrong that the Ria.Control is not there. thanks shannon

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• TypeConverter prevents ApplyPropertyChanges in EntityFramework

  - by Felix

  I ran into an interesting problem (hopefully, interesting not just for me :) I am running Entity Framework 1 (.NET 3.5) and ASP.NET MVC 2. I have a Customer class that has many-to-one relationship with Country class (in other words, Country is a lookup table for customers - I described more in this post: http://stackoverflow.com/questions/2404801/explicit-casting-doesnt-work-in-default-model-binding ) I got TypeConverter to work; so I am getting a perfect object into controller's Post method. Create works fine; however, in Edit I am getting the following error when I call ApplyPropertyChanges: The existing object in the ObjectContext is in the Added state. Changes can only be applied when the existing object is in an unchanged or modified state. The controller code is fairly trivial: public ActionResult Edit(Customer customerToEdit) { if (ModelState.IsValid) { Customer cust = (Customer)context.GetObjectByKey( new EntityKey("BAEntities.Customers", "CustomerID", customerToEdit.CustomerID)); context.ApplyPropertyChanges(cust.EntityKey.EntitySetName, customerToEdit); context.SaveChanges(); } return View(...); } If I remove country from the form, it works fine; and if I assign dropdown value to EntityReference "manually" - it works as well. TypeConverter code is also fairly simple, but I've never used TypeConverter before, so I may be missing something here: public override object ConvertFrom(ITypeDescriptorContext typeContext, CultureInfo culture, object value) { if (value is string) { int countryID = Int16.Parse((string)value); Country country = (Country)context.GetObjectByKey( new EntityKey("BAEntities.Countries", "CountryID", countryID)); return country; } return base.ConvertFrom(typeContext, culture, value); }

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• Object of type 'customObject' cannot be converted to type 'customObject'.

  - by Phani Kumar PV

  i am receiving the follwing error when i am invoking a custom object "Object of type 'customObject' cannot be converted to type 'customObject'." Following is the scenario when i am getting the error i am invoking a method in a dll dynamically. Load an assembly CreateInstance.... calling MethodInfo.Invoke() passing int, string as a parameter for my method is working fine = No exceptions are thrown. But if I try and pass a one of my own custom class objects as a parameter, then I get an ArgumentException exception, and it is not either an ArgumentOutOfRangeException or ArgumentNullException. "Object of type 'customObject' cannot be converted to type 'customObject'." I am doing this in a web application. The class file containing the method is in a different proj . also the custom object is a sepearte class in the same file. there is no such thing called a static aseembly in my code. I am trying to invoke a webmethod dynamically. this webmethod is having the customObject type as an input parameter. So when i invoke the webmethod i am dynamically creating the proxy assembly and all. From the same assembly i am trying to create an instance of the cusotm object assinging the values to its properties and then passing this object as a parameter and invoking the method. everything is dynamic and nothing is created static.. :( add reference is not used. Following is a sample code i tried to create it public static object CallWebService(string webServiceAsmxUrl, string serviceName, string methodName, object[] args) { System.Net.WebClient client = new System.Net.WebClient(); //-Connect To the web service using (System.IO.Stream stream = client.OpenRead(webServiceAsmxUrl + "?wsdl")) { //--Now read the WSDL file describing a service. ServiceDescription description = ServiceDescription.Read(stream); ///// LOAD THE DOM ///////// //--Initialize a service description importer. ServiceDescriptionImporter importer = new ServiceDescriptionImporter(); importer.ProtocolName = "Soap12"; // Use SOAP 1.2. importer.AddServiceDescription(description, null, null); //--Generate a proxy client. importer.Style = ServiceDescriptionImportStyle.Client; //--Generate properties to represent primitive values. importer.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties; //--Initialize a Code-DOM tree into which we will import the service. CodeNamespace nmspace = new CodeNamespace(); CodeCompileUnit unit1 = new CodeCompileUnit(); unit1.Namespaces.Add(nmspace); //--Import the service into the Code-DOM tree. This creates proxy code //--that uses the service. ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit1); if (warning == 0) //--If zero then we are good to go { //--Generate the proxy code CodeDomProvider provider1 = CodeDomProvider.CreateProvider("CSharp"); //--Compile the assembly proxy with the appropriate references string[] assemblyReferences = new string[5] { "System.dll", "System.Web.Services.dll", "System.Web.dll", "System.Xml.dll", "System.Data.dll" }; CompilerParameters parms = new CompilerParameters(assemblyReferences); CompilerResults results = provider1.CompileAssemblyFromDom(parms, unit1); //-Check For Errors if (results.Errors.Count > 0) { StringBuilder sb = new StringBuilder(); foreach (CompilerError oops in results.Errors) { sb.AppendLine("========Compiler error============"); sb.AppendLine(oops.ErrorText); } throw new System.ApplicationException("Compile Error Occured calling webservice. " + sb.ToString()); } //--Finally, Invoke the web service method Type foundType = null; Type[] types = results.CompiledAssembly.GetTypes(); foreach (Type type in types) { if (type.BaseType == typeof(System.Web.Services.Protocols.SoapHttpClientProtocol)) { Console.WriteLine(type.ToString()); foundType = type; } } object wsvcClass = results.CompiledAssembly.CreateInstance(foundType.ToString()); MethodInfo mi = wsvcClass.GetType().GetMethod(methodName); return mi.Invoke(wsvcClass, args); } else { return null; } } } I cant find anything static being done by me. any help is greatly appreciated. Regards, Phani Kumar PV

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• How to handle One View with multiple ViewModel and fire different Commands

  - by Naresh

  Hi All, I have senario in which one view and view has binding with multiple ViewModel. Eg. One View displaying Phone Detail and ViewModel as per bellow: Phone basic features- PhoneViewModel, Phone Price Detail- PhoneSubscriptionViewModel, Phone Accessories- PhoneAccessoryViewModel For general properties- PhoneDetailViewModel I have placed View's general properties to PhoneViewModel.Now senario is like this: By default View displays Phone Basic feaures which is bind with ObservationCollection of PhoneViewModel. My view have button - 'View Accessories', onclick of this button one popup screen- in my design I have display/hide Grid and bind it with ObservationCollection of PhoneAccessoryViewModel. Now problem begins- Accessory List also have button 'View Detail' onclick I have to open one popup screen, here also I had placed one Grid and Visible/Hide it. I have bind 'ViewAccessoryDetailCommand' command to 'View Detail' button. And on command execution one function fires and set property which Visible the Popup screen. Using such programming command fires, function calls but the property change not raises and so my view does not display popup. Summary: One View-- ViewModel1--Grid Bind view ViewModel2 --Grid Have Button and Onclick display new Grid which binded with ViewModel3-this Command fires but property not raises. I think there is some problem in my methodology, Please, give your suggetions.

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• emacs frustration with web development any working dot-files?

  - by Tony Cruise

  I really liked flexibility of emacs but it is really annoying to make it work. I want to use it for web development html, css, javascript, php. I first tried emacs-starter-kit . It didn't included nXhtml. Also C-g key binding does not work (they call it starter kit but basic key command does not work). I think it is mapped for git control. That's a frustration for a beginner. Then I replaced emacs-starter-kit with nXhtml. At least C-g is working. But code completion sucks, M-tab does not work. I tried code completion from nXhtml menu with no success. Also NXhtml mode did'nt colorized my file if css is mixed with html. Isn't it recommended for mixed html, css,php files. So why it doesnt work?. Why Emacs folks do not aware of convention over configuration? Dam! ship it something works! Please help me before I am getting crazy. I use Ubuntu 10.04 and emacs-snaphot-gtk 23.1.50-1. Please guide me step by step with your working dotfile url. Even I accept I am a dummy, it is really annoying and frustrating to use emacs.

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• ant deploy to oc4j problem

  - by senzacionale

  BUILD FAILED C:\Projekti\Projekt ANT\build.xml:337: Problem: failed to create task or type antlib:oracle:deploy Cause: The name is undefined. Action: Check the spelling. Action: Check that any custom tasks/types have been declared. Action: Check that any / declarations have taken place. No types or tasks have been defined in this namespace yet This appears to be an antlib declaration. Action: Check that the implementing library exists in one of: -C:\Projekti\Apache ANT\apache-ant-1.8.1\bin..\lib -C:\Documents and Settings\MitjaG.ant\lib -a directory added on the command line with the -lib argument CODE: <target name="deploy" depends="init, ear"> <oracle:deploy moduletype="ear" host="${oc4j.host}" port="${oc4j.admin.port}" userid="${oc4j.admin.user}" password="${oc4j.admin.password}" file="${dest.dir}/${package.name}/${view.dir}/${deploy.dir}/${ear.file}" deploymentname="${app.name}" logfile="${log.dir}/deploy-ear.log"/> <oracle:bindWebApp host="${oc4j.host}" port="${oc4j.admin.port}" userid="${oc4j.admin.user}" password="${oc4j.admin.password}" deploymentname="${app.name}" webmodule="${web.name}" websitename="${oc4j.binding.module}" contextroot="/${app.name}" /> </target> I google and search for whole day but i can not find solution. There is no good docs for oc4j and ant except this from 2005: http://www.it-eye.nl/weblog/2005/08/15/how-to-using-ant-to-deploy-to-oc4j-dp4/

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• WPF Datagrid set the column values only when the row is left

  - by Noam

  Hello I have a simple class. When I use it in winforms binding, whenever I change a value of a cell and leave the cell, the property immediately get changed. Using WPF Datagrid, whenever i change a value of a cell, the property gets set only after I leave the row. That is problematic for me. What am I doing wrong? Here is my code: public class MyClass : IEditableObject, INotifyPropertyChanged { string _name, _lastName; public string Name { get { return _name; } set { _name = value; _lastName = value + " xxx"; OnPropertyChanged("LastName"); MessageBox.Show("Test"); } } private void OnPropertyChanged(string p) { var x = new PropertyChangedEventArgs(p); if (PropertyChanged != null) PropertyChanged(this, x); } public string LastName { get { return _lastName; } set { _lastName = value; } } public void BeginEdit() { } public void CancelEdit() { } public void EndEdit() { } public event PropertyChangedEventHandler PropertyChanged; } public class myBindingList : BindingList<MyClass> { public myBindingList() { AllowNew = true; Add(new MyClass { Name = "noam" }); Add(new MyClass { Name = "yael" }); } }

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• How do I stop a datagrid's first-row itemRenderer from instantiating/adding/initializing/etc twice?

  - by Michael Prescott

  In a Flex DataGrid's first row, the itemRenderer will initialize twice. Tracing the results reveals that the flex framework is possibly creating two instances of the first row's itemRenderer. In a more complex application, where the itemRenderer contains a data-bound ColorPicker, we're seeing an infinite loop occur because of this problem. Only the first row's itemRenderer is initialized twice. Is there a way to override flex's behavior and stop this from occurring? The following code demonstrates the problem: Main Application: <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="on_initialize(event);"> <mx:Script> <![CDATA[ /** * This experiment shows how the first row's itemrenderer is instantiated/added/initialized twice. * We've never even noticed this before we found that a data-bound ColorPicker enters a infinite * loop when it is within an itemRenderer. */ import mx.collections.ArrayCollection; import mx.events.FlexEvent; private var dg_array:Array; private var dg_arrayCollection:ArrayCollection; private function on_initialize(event:FlexEvent):void { dg_array = new Array(); dg_arrayCollection = new ArrayCollection(); dg_arrayCollection.addItem("item 1"); dg_arrayCollection.addItem("item 2"); dg.dataProvider = dg_arrayCollection; } ]]> </mx:Script> <mx:DataGrid id="dg" width="100%" height="100%" rowCount="5"> <mx:columns> <mx:DataGridColumn headerText="Name" itemRenderer="SimpleItemRenderer"/> </mx:columns> </mx:DataGrid> </mx:Application> SimpleItemRenderer: <?xml version="1.0" encoding="utf-8"?> <mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300" initialize="//on_initialize(event);"> <mx:Script> <![CDATA[ import mx.events.FlexEvent; [Bindable] override public function set data(value:Object):void { _data = value; } override public function get data():Object { return _data; } private var _data:Object; private function on_initialize_textInput(event:FlexEvent):void { trace("initialize:event.target="+event.target+", " + _data); // runs twice, for the first item only } private function on_creationComplete_textInput(event:FlexEvent):void { trace("creationComplete:event.target="+event.target+", " + _data); // runs twice, for the first item only } ]]> </mx:Script> <mx:TextInput text="{data}" id="textInput" initialize="on_initialize_textInput(event);" creationComplete="on_creationComplete_textInput(event);"/> </mx:Canvas> Abbreviated Output: initialize:event.target=ItemRenderers0.dg...SimpleItemRenderer12.textInput, null initialize:event.target=ItemRenderers0.dg...SimpleItemRenderer24.textInput, null creationComplete:event.target=ItemRenderers0.dg...SimpleItemRenderer24.textInput, item 1 initialize:event.target=ItemRenderers0.dg...SimpleItemRenderer29.textInput, null creationComplete:event.target=ItemRenderers0.dg...SimpleItemRenderer29.textInput, item 2 creationComplete:event.target=ItemRenderers0.dg...SimpleItemRenderer12.textInput, item 1

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• DataGridViewColumn.DataPropertyName Property

  - by Captain Comic

  Hi I have a DataGridView control and I want to populate it with data. I use DataSource property // dgvDealAsset is DataGridView private void DealAssetListControl_Load(object sender, EventArgs e) { dgvDealAssets.AutoGenerateColumns = false; dgvDealAssets.DataSource = DealAssetList.Instance.Values.ToList(); } Now problem number one. The class of my collection does not contain only simple types that I can map to columns using DataPropertyName. This is the class that is contained in collection. class MyClass { public String Name; MyOtherClass otherclass; } class MyOtherClass { public String Name; } Now I am binding properties of MyClass to columns col1.DataPropertyName = "Name" // Ok col2.DataPropertyName = "otherclass" // Not OK - I will have empty cell The problem is that I want to display otherclass.Name field. But if I try to write col2.DataPropertyName = "otherclass.Name" I get empty cell. I tried to manually set the column private void DealAssetListControl_Load(object sender, EventArgs e) { dgvDealAssets.AutoGenerateColumns = false; dgvDealAssets.DataSource = DealAssetList.Instance.Values.ToList(); // iterate through rows and set the column manually foreach (DataGridViewRow row in dgvDealAssets.Rows) { row.Cells["Column2"].Value = ((DealAsset)row.DataBoundItem).otherclass.Name; } But this foreach cycle takes about minute to complete (2k elements). How to solve this problem?

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• SerializationException Occurring Only in Release Mode

  - by Calvin Nguyen

  Hi, I am working on an ASP.NET web app using Visual Studio 2008 and a third-party library. Things are fine in my development environment. Things are also good if the web app is deployed in Debug configuration. However, when it is deployed in Release mode, SerializationExceptions appear intermittently, breaking other functionality. In the Windows event log, the following error can be seen: "An unhandled exception occurred and the process was terminated. Application ID: DefaultDomain Process ID: 3972 Exception: System.Runtime.Serialization.SerializationException Message: Unable to find assembly 'MyThirdPartyLibrary, Version=1.234.5.67, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89'. StackTrace: at System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssembly( ) at System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType(BinaryAsse mblyInfo assemblyInfo, String name) at System.Runtime.Serialization.Formatters.Binary.ObjectMap..ctor(String objectName, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) at System.Runtime.Serialization.Formatters.Binary.ObjectMap.Create(String name, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) at System.Runtime.Serialization.Formatters.Binary._BinaryParser.ReadObjectWithMa pTyped(BinaryObjectWithMapTyped record) at System.Runtime.Serialization.Formatters.Binary._BinaryParser.ReadObjectWithMa pTyped(BinaryHeaderEnum binaryHeaderEnum) at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run() at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(Header Handler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Str eam serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Remoting.Channels.CrossAppDomainSerializer.DeserializeObject(Me moryStream stm) at System.AppDomain.Deserialize(Byte[] blob) at System.AppDomain.UnmarshalObject(Byte[] blob) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp." Using FUSLOGVW.exe (i.e., Assembly Binding Log Viewer), I can see the problem is that IIS attempts to find MyThirdPartyLibrary in directory C:\windows\system32\inetsrv. It refuses to look in the bin folder of the web app, where the DLL is actually located. Does anyone know what the problem is? Thanks, Calvin

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• class not found expection.

  - by theJava

  org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mySessionFactory' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.util.ArrayList' to required type 'java.lang.Class[]' for property 'annotatedClasses'; nested exception is java.lang.IllegalArgumentException: Cannot find class [com.vinoth.domain.User] org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:563) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127) javax.servlet.GenericServlet.init(GenericServlet.java:212) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879) org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) java.lang.Thread.run(Unknown Source) I have the particular class in my source and here is my bean config and yet when i compile my application it throws me the error. <?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:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" /> <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://127.0.0.1:3306/spring"/> <property name="username" value="monty"/> <property name="password" value="indian"/> </bean> <bean id="mySessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="myDataSource" /> <property name="annotatedClasses"> <list> <value>com.vinoth.domain.User</value> </list> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">create</prop> </props> </property> </bean> <bean id="myUserDAO" class="com.vinoth.dao.UserDAOImpl"> <property name="sessionFactory" ref="mySessionFactory"/> </bean> <bean name="/user/*.htm" class="com.vinoth.web.UserController" > <property name="userDAO" ref="myUserDAO" /> </bean> </beans>

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• Can xjc -version be trusted?

  - by JasonPlutext

  I've spent the day debugging an issue with JAXB getting namespaces wrong or missing (possibly related to Marshaller.JAXB_FRAGMENT, but that's not the point here). I found the problem occurs with JAXB RI 2.1.10 in my endorsed dir. It is fixed if I use JAXB RI 2.2.4 or 2.2.6 Here is what is really confusing (and what made it take so long). The problem occurs on Linux with: $ java -version java version "1.7.0_03" OpenJDK Runtime Environment (IcedTea7 2.1.1pre) (7~u3-2.1.1~pre1-1ubuntu2) OpenJDK 64-Bit Server VM (build 22.0-b10, mixed mode) $ xjc -version xjc 2.2.4 but it should work fine, if this java really uses JAXB RI 2.2.4 !! Similarly, I can't reproduce the issue on Windows with Java 1.6.0_27, which reports: C:\Program Files\Java\jdk1.6.0_27\bin>java -version java version "1.6.0_27" Java(TM) SE Runtime Environment (build 1.6.0_27-b07) Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06, mixed mode) C:\Program Files\Java\jdk1.6.0_27\bin>xjc -version xjc version "JAXB 2.1.10 in JDK 6" JavaTM Architecture for XML Binding(JAXB) Reference Implementation, (build JAXB 2.1.10 in JDK 6) and yet if I put 2.1.10 RI in my endorsed dir, the problem occurs. It should occur with 1.6.0_27, if that really uses JAXB RI 2.1.10. It seems to me that the problem I'm experiencing has been fixed in the reference implementation somewhere after 2.1.10 and before 2.2.4, but that neither of the 2 VM's above actually use the JAXB version they claim to. Or possibly they use the xjc they claim, but not what is in jaxb-api.jar and jaxb-impl.jar (I know there is a difference in the namespace prefix mapper property, but that won't be causing this problem). I've done these experiments on Win 7 and Ubuntu, in tomcat (no eclipse), and in eclipse (no tomcat), so I'm pretty confident I'm explaining my findings correctly. Can anyone provide any insight into what is happening? If I'm right, does anyone know what versions of JAXB the various Sun/Oracle JDKs really use?

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• Complex data types in WCF?

  - by Hojou

  I've run into a problem trying to return an object that holds a collection of childobjects that again can hold a collection of grandchild objects. I get an error, 'connection forcibly closed by host'. Is there any way to make this work? I currently have a structure resembling this: pseudo code: Person: IEnumerable<Order> Order: IEnumberable<OrderLine> All three objects have the DataContract attribute and all public properties i want exposed (including the IEnumerable's) have the DataMember attribute. I have multiple OperationContract's on my service and all the methods returning a single object OR an IEnumerable of an object works perfectly. It's only when i try to nest IEnumerable that it turns bad. Also in my client service reference i picked the generic list as my collection type. I just want to emphasize, only one of my operations/methods fail with this error - the rest of them work perfectly. EDIT (more detailed error description): [SocketException (0x2746): An existing connection was forcibly closed by the remote host] [IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.] [WebException: The underlying connection was closed: An unexpected error occurred on a receive.] [CommunicationException: An error occurred while receiving the HTTP response to http://myservice.mydomain.dk/MyService.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details.] I tried looking for logs but i can't find any... also i'm using a WSHttpBinding and an http endpoint.

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• NHibernate MySQL Composite-Key

  - by LnDCobra

  I am trying to create a composite key that mimicks the set of PrimaryKeys in the built in MySQL.DB table. The Db primary key is as follows: Field | Type | Null | ---------------------------------- Host | char(60) | No | Db | char(64) | No | User | char(16) | No | This is my DataBasePrivilege.hbm.xml file <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="TGS.MySQL.DataBaseObjects" namespace="TGS.MySQL.DataBaseObjects"> <class name="TGS.MySQL.DataBaseObjects.DataBasePrivilege,TGS.MySQL.DataBaseObjects" table="db"> <composite-id name="CompositeKey" class="TGS.MySQL.DataBaseObjects.DataBasePrivilegePrimaryKey, TGS.MySQL.DataBaseObjects"> <key-property name="Host" column="Host" type="char" length="60" /> <key-property name="DataBase" column="Db" type="char" length="64" /> <key-property name="User" column="User" type="char" length="16" /> </composite-id> </class> </hibernate-mapping> The following are my 2 classes for my composite key: namespace TGS.MySQL.DataBaseObjects { public class DataBasePrivilege { public virtual DataBasePrivilegePrimaryKey CompositeKey { get; set; } } public class DataBasePrivilegePrimaryKey { public string Host { get; set; } public string DataBase { get; set; } public string User { get; set; } public override bool Equals(object obj) { if (ReferenceEquals(null, obj)) return false; if (ReferenceEquals(this, obj)) return true; if (obj.GetType() != typeof (DataBasePrivilegePrimaryKey)) return false; return Equals((DataBasePrivilegePrimaryKey) obj); } public bool Equals(DataBasePrivilegePrimaryKey other) { if (ReferenceEquals(null, other)) return false; if (ReferenceEquals(this, other)) return true; return Equals(other.Host, Host) && Equals(other.DataBase, DataBase) && Equals(other.User, User); } public override int GetHashCode() { unchecked { int result = (Host != null ? Host.GetHashCode() : 0); result = (result*397) ^ (DataBase != null ? DataBase.GetHashCode() : 0); result = (result*397) ^ (User != null ? User.GetHashCode() : 0); return result; } } } } And the following is the exception I am getting: Execute System.InvalidCastException: Unable to cast object of type 'System.Object[]' to type 'TGS.MySQL.DataBaseObjects.DataBasePrivilegePrimaryKey'. at (Object , GetterCallback ) at NHibernate.Bytecode.Lightweight.AccessOptimizer.GetPropertyValues(Object target) at NHibernate.Tuple.Component.PocoComponentTuplizer.GetPropertyValues(Object component) at NHibernate.Type.ComponentType.GetPropertyValues(Object component, EntityMode entityMode) at NHibernate.Type.ComponentType.GetHashCode(Object x, EntityMode entityMode) at NHibernate.Type.ComponentType.GetHashCode(Object x, EntityMode entityMode, ISessionFactoryImplementor factory) at NHibernate.Engine.EntityKey.GenerateHashCode() at NHibernate.Engine.EntityKey..ctor(Object identifier, String rootEntityName, String entityName, IType identifierType, Boolean batchLoadable, ISessionFactoryImplementor factory, EntityMode entityMode) at NHibernate.Engine.EntityKey..ctor(Object id, IEntityPersister persister, EntityMode entityMode) at NHibernate.Event.Default.DefaultLoadEventListener.OnLoad(LoadEvent event, LoadType loadType) at NHibernate.Impl.SessionImpl.FireLoad(LoadEvent event, LoadType loadType) at NHibernate.Impl.SessionImpl.Get(String entityName, Object id) at NHibernate.Impl.SessionImpl.Get(Type entityClass, Object id) at NHibernate.Impl.SessionImpl.Get[T](Object id) at TGS.MySQL.DataBase.DataProvider.GetDatabasePrivilegeByHostDbUser(String host, String db, String user) in C:\Documents and Settings\Michal\My Documents\Visual Studio 2008\Projects\TGS\TGS.MySQL.DataBase\DataProvider.cs:line 20 at TGS.UserAccountControl.UserAccountManager.GetDatabasePrivilegeByHostDbUser(String host, String db, String user) in C:\Documents and Settings\Michal\My Documents\Visual Studio 2008\Projects\TGS\TGS.UserAccountControl\UserAccountManager.cs:line 10 at TGS.UserAccountControlTest.UserAccountManagerTest.CanGetDataBasePrivilegeByHostDbUser() in C:\Documents and Settings\Michal\My Documents\Visual Studio 2008\Projects\TGS\TGS.UserAccountControlTest\UserAccountManagerTest.cs:line 12 I am new to NHibernate and any help would be appreciated. I just can't see where it is getting the object[] from? Is the composite key supposed to be object[]?

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• JAXB + JAK java.lang.ClassCastException

  - by Ivansek

  Hi, I read page about JAK implementation where is a piece of code from pom.xml file (Listing 1). This piece of code is actually commented in pom.xml file so i uncommented it in order to add my own schema to compile. After that i run command mvn -e clean install, and i get this error: ivansek ~/Sites/Xlab/KMLTest/javaapiforkml-read-only $ mvn -e clean install + Error stacktraces are turned on. [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building a Java API for Kml [INFO] task-segment: [clean, install] [INFO] ------------------------------------------------------------------------ [INFO] [clean:clean {execution: default-clean}] [INFO] [antrun:run {execution: xjc-invocation}] [INFO] Executing tasks [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] An Ant BuildException has occured: java.util.ServiceConfigurationError: com.sun.tools.xjc.Plugin: Provider org.jvnet.jaxb2_commons.javaforkmlapi.XJCJavaForKmlApiPlugin could not be instantiated: java.lang.ClassCastException [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An Ant BuildException has occured: java.util.ServiceConfigurationError: com.sun.tools.xjc.Plugin: Provider org.jvnet.jaxb2_commons.javaforkmlapi.XJCJavaForKmlApiPlugin could not be instantiated: java.lang.ClassCastException at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An Ant BuildException has occured: java.util.ServiceConfigurationError: com.sun.tools.xjc.Plugin: Provider org.jvnet.jaxb2_commons.javaforkmlapi.XJCJavaForKmlApiPlugin could not be instantiated: java.lang.ClassCastException at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:131) at org.apache.maven.plugin.antrun.AntRunMojo.execute(AntRunMojo.java:98) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694) ... 17 more Caused by: java.util.ServiceConfigurationError: com.sun.tools.xjc.Plugin: Provider org.jvnet.jaxb2_commons.javaforkmlapi.XJCJavaForKmlApiPlugin could not be instantiated: java.lang.ClassCastException at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:116) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:357) at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:118) ... 20 more Caused by: java.util.ServiceConfigurationError: com.sun.tools.xjc.Plugin: Provider org.jvnet.jaxb2_commons.javaforkmlapi.XJCJavaForKmlApiPlugin could not be instantiated: java.lang.ClassCastException at java.util.ServiceLoader.fail(ServiceLoader.java:207) at java.util.ServiceLoader.access$100(ServiceLoader.java:164) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:353) at java.util.ServiceLoader$1.next(ServiceLoader.java:421) at com.sun.tools.xjc.Options.findServices(Options.java:910) at com.sun.tools.xjc.Options.getAllPlugins(Options.java:351) at com.sun.tools.xjc.Options.parseArgument(Options.java:650) at com.sun.tools.xjc.Options.parseArguments(Options.java:760) at com.sun.tools.xjc.XJC2Task._doXJC(XJC2Task.java:453) at com.sun.tools.xjc.XJC2Task.doXJC(XJC2Task.java:443) at com.sun.tools.xjc.XJC2Task.execute(XJC2Task.java:369) at com.sun.istack.tools.ProtectedTask.execute(ProtectedTask.java:55) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) ... 23 more Caused by: java.lang.ClassCastException at java.lang.Class.cast(Class.java:2990) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:345) ... 38 more [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3 seconds [INFO] Finished at: Thu May 13 09:53:19 CEST 2010 [INFO] Final Memory: 16M/79M [INFO] ------------------------------------------------------------------------ Any suggestions?

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• Consume webservice from a .NET DLL - app.config problem

  - by Asaf R

  Hi, I'm building a DLL, let's call it mydll.dll, and in it I sometimes need to call methods from webservice, myservice. mydll.dll is built using C# and .NET 3.5. To consume myservice from mydll I've Added A Service in Visual Studio 2008, which is more or less the same as using svcutil.exe. Doing so creates a class I can create, and adds endpoint and bindings configurations to mydll app.config. The problem here is that mydll app.config is never loaded. Instead, what's loaded is the app.config or web.config of the program I use mydll in. I expect mydll to evolve, which is why I've decoupled it's funcionality from the rest of my system to begin with. During that evolution it will likely add more webservice to which it'll call, ruling out manual copy-paste ways to overcome this problem. I've looked at several possible approaches to attacking this issue: Manually copy endpoints and bindings from mydell app.config to target EXE or web .config file. Couples the modules, not flexible Include endpoints and bindings from mydll app.config in target .config, using configSource (see here). Also add coupling between modules Programmatically load mydll app.config, read endpoints and bindings, and instantiate Binding and EndpointAddress. Use a different tool to create local frontend for myservice I'm not sure which way to go. Option 3 sounds promising, but as it turns out it's a lot of work and will probably introduce several bugs, so it doubtfully pays off. I'm also not familiar with any tool other than the canonical svcutil.exe. Please either give pros and cons for the above alternative, provide tips for implementing any of them, or suggest other approaches. Thanks, Asaf

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• Problem simulating HTTP POST using HttpClient

  - by user560904

  I am trying to programatically send a HTTP Post request using HttpClient to http://ojp.nationalrail.co.uk/en/s/planjourney/query but it is not liking the request I send it. I copied the headers and body from what Chrome browser sends so it is identical but it doesn't like what I send as the HTML mentions there's an error. <div class="padding"> <h1 class="sifr"><strong>Sorry</strong>, something went wrong</h1> <div class="error-message"> <div class="error-message-padding"> <h2>There is a problem with the page you are trying to access.</h2> <p>It is possible that it was either moved, it doesn't exist or we are experiencing some technical difficulties.</p> <p>We are sorry for the inconvenience.</p> </div> </div> </div> Here is my Java program which uses HttpClient: package com.tixsnif; import org.apache.http.*; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import org.apache.http.protocol.HTTP; import java.io.*; import java.util.*; import java.util.zip.GZIPInputStream; public class WebScrapingTesting { public static void main(String[] args) throws Exception { String target = "http://ojp.nationalrail.co.uk/en/s/planjourney/query"; HttpClient client = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(target); BasicNameValuePair[] params = { new BasicNameValuePair("jpState", "single"), new BasicNameValuePair("commandName", "journeyPlannerCommand"), new BasicNameValuePair("from.searchTerm", "Basingstoke"), new BasicNameValuePair("to.searchTerm", "Reading"), new BasicNameValuePair("timeOfOutwardJourney.arrivalOrDeparture", "DEPART"), new BasicNameValuePair("timeOfOutwardJourney.monthDay", "Today"), new BasicNameValuePair("timeOfOutwardJourney.hour", "10"), new BasicNameValuePair("timeOfOutwardJourney.minute", "15"), new BasicNameValuePair("timeOfReturnJourney.arrivalOrDeparture", "DEPART"), new BasicNameValuePair("timeOfReturnJourney.monthDay", "Today"), new BasicNameValuePair("timeOfReturnJourney.hour", "18"), new BasicNameValuePair("timeOfReturnJourney.minute", "15"), new BasicNameValuePair("_includeOvertakenTrains", "on"), new BasicNameValuePair("viaMode", "VIA"), new BasicNameValuePair("via.searchTerm", "Station name / code"), new BasicNameValuePair("offSetOption", "0"), new BasicNameValuePair("_reduceTransfers", "on"), new BasicNameValuePair("operatorMode", "SHOW"), new BasicNameValuePair("operator.code", ""), new BasicNameValuePair("_lookForSleeper", "on"), new BasicNameValuePair("_directTrains", "on")}; httpPost.setHeader("Host", "ojp.nationalrail.co.uk"); httpPost.setHeader("User-Agent", "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.231 Safari/534.10"); httpPost.setHeader("Accept-Encoding", "gzip,deflate,sdch"); httpPost.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,**/*//*;q=0.8"); httpPost.setHeader("Accept-Language", "en-us,en;q=0.8"); httpPost.setHeader("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7"); httpPost.setHeader("Origin", "http://www.nationalrail.co.uk/"); httpPost.setHeader("Referer", "http://www.nationalrail.co.uk/"); httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded"); httpPost.setHeader("Cookie", "JSESSIONID=B2A3419B79C5D999CA4806B459675CCD.app201; Path=/"); UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(Arrays.asList(params)); urlEncodedFormEntity.setContentEncoding(HTTP.UTF_8); httpPost.setEntity(urlEncodedFormEntity); HttpResponse response = client.execute(httpPost); InputStream input = response.getEntity().getContent(); GZIPInputStream gzip = new GZIPInputStream(input); InputStreamReader isr = new InputStreamReader(gzip); BufferedReader br = new BufferedReader(isr); String line = null; while((line = br.readLine()) != null) { System.out.printf("\n%s", line); } client.getConnectionManager().shutdown(); } } I keep the JSESSION ID updated if it expires but there seems to be another problem that I cannot see. Am I missing something rather obvious? He

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• Bazaar + CruiseControl.Net

  - by Chris Gill

  I want to setup CruiseControl.Net at my company. We currently have several .net solutions stored in a Bazaar repository and I want to use MSBuild to build each solution. This didn't seem too controversial, but I can't see an easy way of binding CruiseControl.Net to Bazaar. There seems to have been a plugin to do this at http://www.sorn.net/projects/bazaar-ccnet but this link no longer works and I cant seem to find the plugin anywhere else I was going to use the External source control type, but bazaar seems to bork at the GETMODS parameter being passed to it My current thought now is to create a separate project to pull modifications from bazaar using an Exec task, then create another project to run a FileSystem source control check on that directory. I'm moderately sure I can get this to work, but it seems a bit hacky. I don't mind writing a new Bazaar plugin for CruiseControl.Net but I cant find where to start with this. My questions are do you run these two in combination, if so how do you do it? If you don't run these together, do you have any recommendations on a good approach? Is there any documentation or good starting point that I could use to write a bazaar plugin? Am I an idiot for trying to use CruiseControl.Net? Should I be using something else?

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• Why can't I reference child entities with part of the parent entities composite key

  - by tigermain

  I am trying to reference some child entities with part of the parents composite key not all of it, why cant I? This happens when I use the following mapping instead of that which is commented. I get the following error Foreign key in table VolatileEventContent must have same number of columns as referenced primary key in table LocationSearchView <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="JeanieMaster.Domain.Entities" assembly="JeanieMaster.Domain"> <class name="LocationSearchView" table="LocationSearchView"> <composite-id> <key-property name="LocationId" type="Int32"></key-property> <key-property name="ContentProviderId" type="Int32"></key-property> <key-property name="CategoryId" type="Int32"></key-property> </composite-id> <property name="CompanyName" type="String" not-null="true" update="false" insert="false"/> <property name="Description" type="String" not-null="true" update="false" insert="false"/> <property name="CategoryId" type="Int32" not-null="true" update="false" insert="false"/> <property name="ContentProviderId" type="Int32" not-null="true" update="false" insert="false"/> <property name="LocationId" type="Int32" not-null="true" update="false" insert="false"/> <property name="Latitude" type="Double" update="false" insert="false" /> <property name="Longitude" type="Double" update="false" insert="false" /> <bag name="Events" table="VolatileEventContent" where="DeactivatedOn IS NULL" order-by="StartDate DESC" lazy="false" cascade="none"> <key> <column name="LocationId"></column> <column name="ContentProviderId"></column> <!--<column name="LocationId"></column> <column name="ContentProviderId"></column> <column name="CategoryId"></column>--> </key> <one-to-many class="Event" column="VolatileEventContentId"></one-to-many> </bag> </class> </hibernate-mapping> And VolatileEventContent mapping file <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="JeanieMaster.Domain.Entities" assembly="JeanieMaster.Domain"> <class name="Event" table="VolatileEventContent" select-before-update="false" optimistic-lock="none"> <composite-id> <key-property name="LocationId" type="Int32"></key-property> <key-property name="ContentProviderId" type="Int32"></key-property> </composite-id> <property name="Description" type="String" not-null="true" update="false" insert="false"/> <property name="StartDate" type="DateTime" not-null="true" update="false" insert="false" /> <property name="EndDate" type="DateTime" not-null="true" update="false" insert="false" /> <property name="CreatedOn" type="DateTime" not-null="true" update="false" insert="false" /> <property name="ModifiedOn" type="DateTime" not-null="false" update="false" insert="false" /> <many-to-one name="Location" class="Location" column="LocationId" /> <bag name="Artistes" table="EventArtiste" lazy="false" cascade="none"> <key name="VolatileEventContentId" /> <many-to-many class="Artiste" column="ArtisteId" ></many-to-many> </bag> </class> </hibernate-mapping>

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• Databinding in WinForms performing async data import

  - by burnside

  I have a scenario where I have a collection of objects bound to a datagrid in winforms. If a user drags and drops an item on to the grid, I need to add a placeholder row into the grid and kick off a lengthy async import process. I need to communicate the status of the async import process back to the UI, updating the row in the grid and have the UI remain responsive to allow the user to edit the other rows. What's the best practice for doing this? My current solution is: binding a thread safe implementation of BindingList to the grid, filled with the objects that are displayed as rows in the grid. When a user drags and drops an item on to the grid, I create a new object containing the sparse info obtained from the dropped item and add that to the BindingList, disabling the editing of that row. I then fire off a separate thread to do the import, passing it the newly bound object I have just created to fill with data. The import process, periodically sets the status of the object and fires an event which is subscribed to by the UI telling it to refresh the grid to see the new properties on the object. Should I be passing the same object that is bound to the grid to the import process thread to operate on, or should I be creating a copy and merging back the changes to the object on the UI thread using BeginInvoke? Any problems or advice with this implementation? Thanks

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• WPF MVVM ViewModel constructor designmode

  - by Snake

  Right, I've got a main wpf window: <Window x:Class="NorthwindInterface.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ViewModels="clr-namespace:NorthwindInterface.ViewModels" Title="MainWindow" Height="350" Width="525"> <Window.DataContext> <ViewModels:MainViewModel /> </Window.DataContext> <ListView ItemsSource="{Binding Path=Customers}"> </ListView> </Window> And the MainViewModel is this: class MainViewModel : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged = delegate { }; public MainViewModel() { Console.WriteLine("test"); using (NorthwindEntities northwindEntities = new NorthwindEntities()) { this.Customers = (from c in northwindEntities.Customers select c).ToList(); } } public List<Customer> Customers { get;private set; } Now the problem is that in designermode I can't see my MainViewModel, it highlights it saying that it can't create an instance of the MainViewModel. It is connecting to a database. That is why (when I comment the code the problem is solved). But I don't want that. Any solutions on best practices around this?

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• New at Python: GLPK not building properly / Python ImportError

  - by Merjit

  This is a beginner question, and a follow-up to this one, where I was pointed to GLPK. I'm trying to get PyGLPK, a Python binding for the GNU Linear Programming Kit up and running, but no matter what I do, I can't seem to build and install GLPK so that Python finds it correctly. This comes after running ./configure, make, and sudo make install on the GLPK libraries, and following the instructions for PyGLPK. Specifically, here is the error I get: >>> import glpk Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site- packages/glpk.so, 2): Symbol not found: __glp_lpx_print_ips Referenced from: /Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/glpk.so Expected in: dynamic lookup I assume that something isn't linking to somewhere else, and that it probably has something to do with paths and environment variables. However, here's where my abilities in the shell fail, and I'm at a loss over what to do next. Again, there is probably a simple answer to this, but I haven't had any luck with Google using the terminology I know.

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• Asp.Net MVC2 Clientside Validation problem with controls with prefixes

  - by alexander

  The problem is: when I put 2 controls of the same type on a page I need to specify different prefixes for binding. In this case the validation rules generated right after the form are incorrect. So how to get client validation work for the case?: the page contains: <% Html.RenderPartial(ViewLocations.Shared.PhoneEditPartial, new PhoneViewModel { Phone = person.PhonePhone, Prefix = "PhonePhone" }); Html.RenderPartial(ViewLocations.Shared.PhoneEditPartial, new PhoneViewModel { Phone = person.FaxPhone, Prefix = "FaxPhone" }); %> the control ViewUserControl<PhoneViewModel>: <%= Html.TextBox(Model.GetPrefixed("CountryCode"), Model.Phone.CountryCode) %> <%= Html.ValidationMessage("Phone.CountryCode", new { id = Model.GetPrefixed("CountryCode"), name = Model.GetPrefixed("CountryCode") })%> where Model.GetPrefixed("CountryCode") just returns "FaxPhone.CountryCode" or "PhonePhone.CountryCode" depending on prefix And here is the validation rules generated after the form. They are duplicated for the field name "Phone.CountryCode". While the desired result is 2 rules (required, number) for each of the FieldNames "FaxPhone.CountryCode", "PhonePhone.CountryCode" The question is somewhat duplicate of http://stackoverflow.com/questions/2675606/asp-net-mvc2-clientside-validation-and-duplicate-ids-problem but the advise to manually generate ids doesn't helps.

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• Update table columns bound to NSArrayController

  - by Loz

  Hi, I'm fairly new to the world of bindings in cocoa, and I'm having some troubles (perhaps/probably due to a misunderstanding). I have a singleton that contains an NSMutableArray called plugins, containing objects of class Plugin. It has a method called loadPlugins which adds objects to the plugins array. This may be called at any point. It's been added as an instance in Interface Builder. Also in IB is an NSObjectController, whose content outlet is connected to the singleton. There is also an NSArrayController, whose contentArray is bound to the NSObjectController (controller key is 'selection', model key path is 'plugins', object class name is 'Plugin'). And finally I have a table view with 2 columns, the values of which are bound to the NSArrayController's arrangedObjects, using keys of properties in the Plugin class. So far so standard (as far as I can tell from tutorials at least). My trouble is that when the loadPlugins method is called in the singleton, and objects are added to the plugins array, the table doesn't update to show the objects (unless loadPlugins is called before the nib is loaded). -reloadData called on the tableView doesn't do anything. Is there a way to tell the NSArrayController that the referenced array has been updated? I understand there is the -add: method for NSArrayController, which could be used in the loadPlugins, but this isn't desirable as I want to keep the singleton totally separate from the display aspect. This seems related to: http://stackoverflow.com/questions/1623396/refresh-cocoa-binding-nsarraycontroller-combobox The line: "editing the array behind the controller's back" seems to perhaps pinpoint the problem, but I would hope that it would be possible to have the singleton not know about the controller. Thanks in advance.

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• Asp.Net MVC Tutorial Unit Tests

  - by Nicholas

  I am working through Steve Sanderson's book Pro ASP.NET MVC Framework and I having some issues with two unit tests which produce errors. In the example below it tests the CheckOut ViewResult: [AcceptVerbs(HttpVerbs.Post)] public ViewResult CheckOut(Cart cart, FormCollection form) { // Empty carts can't be checked out if (cart.Lines.Count == 0) { ModelState.AddModelError("Cart", "Sorry, your cart is empty!"); return View(); } // Invoke model binding manually if (TryUpdateModel(cart.ShippingDetails, form.ToValueProvider())) { orderSubmitter.SubmitOrder(cart); cart.Clear(); return View("Completed"); } else // Something was invalid return View(); } with the following unit test [Test] public void Submitting_Empty_Shipping_Details_Displays_Default_View_With_Error() { // Arrange CartController controller = new CartController(null, null); Cart cart = new Cart(); cart.AddItem(new Product(), 1); // Act var result = controller.CheckOut(cart, new FormCollection { { "Name", "" } }); // Assert Assert.IsEmpty(result.ViewName); Assert.IsFalse(result.ViewData.ModelState.IsValid); } I have resolved any issues surrounding 'TryUpdateModel' by upgrading to ASP.NET MVC 2 (Release Candidate 2) and the website runs as expected. The associated error messages are: *Tests.CartControllerTests.Submitting_Empty_Shipping_Details_Displays_Default_View_With_Error: System.ArgumentNullException : Value cannot be null. Parameter name: controllerContext* and the more detailed at System.Web.Mvc.ModelValidator..ctor(ModelMetadata metadata, ControllerContext controllerContext) at System.Web.Mvc.DefaultModelBinder.OnModelUpdated(ControllerContext controllerContext, ModelBindingContext bindingContext) at System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) at System.Web.Mvc.Controller.TryUpdateModel[TModel](TModel model, String prefix, String[] includeProperties, String[] excludeProperties, IValueProvider valueProvider) at System.Web.Mvc.Controller.TryUpdateModel[TModel](TModel model, IValueProvider valueProvider) at WebUI.Controllers.CartController.CheckOut(Cart cart, FormCollection form) Has anyone run into a similar issue or indeed got the test to pass?

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