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  • ASP.NET LINQ to Delete Rows

    - by Tyler
    Dim db As New SQLDataContext Try Dim deleteBoatPics = (From boat In db.Photos Where boat.boatid = id) db.Photos.DeleteOnSubmit(deleteBoatPics) db.SubmitChanges() Catch ex As Exception End Try I'm getting an error that says: Unable to cast object of type 'System.Data.Linq.DataQuery`1[WhiteWaterPhotos.Photo]' to type 'WhiteWaterPhotos.Photo'. I have two separate db.SubmitChanges() because when the button is pressed, I have it delete the records from 1 table, and then the next. I'm lost, can someone help me out?

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  • Delete rectangle using .NET?

    - by C. Karunarathne
    Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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  • Java Static Methods

    - by KP65
    Hello, I am wondering when to use static methods? Say If i have a class with a few getters and setters, a method or two, and i want those methods only to be invokable on an instance object of the class. Does this mean i should use a static method? e.g Obj x = new Obj(); x.someMethod or Obj.someMethod (is this the static way?) I'm rather confused!

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  • What about optional generic type parameters in C# 5.0?

    - by Lars Corneliussen
    Just a thought. Wouldn't it be useful to have optional type parameters in C#? This would make life simpler. I'm tired of having multiple classes with the same name, but different type parameters. Also VS doesn't support this very vell (file names) :-) This would eliminate the need for a non-generic IEnumerable: interface IEnumerable<out T=object>{ IEnumerator<T> GetEnumerator() } What do you think?

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  • Why is Gmail not showing my text/html alternative?

    - by Stijn Sanders
    I'm creating an outgoing e-mail message (TIdMessage) with add two TIdText objects, one with ContentType:='text/plain' and one ContentType:='text/html', and also a TIdAttachment object. This seems to work for Outlook, which shows the HTML content, but for some odd reason, GMail keeps showing me the text/plain version by default. I've tried adding the text/html version first, I've tried adding '; charset=iso-8859-1' to the content type string, but I can't seem to find what else is different with other e-mails that GMail is showing the HTML from rightaway.

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  • how/resources to compile a procedural language into [sql]

    - by Philip
    I am looking into the possibility/feasibility/resources for building a cross compiler which takes a procedural or Object Oriented language like C, or Java and compiling it into SQL. I understand that the advantage of SQL code is performing set operations which is fundamentally different from procedural languages which generally process 1 at a time. If anyone has done this before, or if it is thought of as too complicated to do or any other ideas/concerns/suggestions would be greatly appreciated. Thanks in advance Philip

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  • How to have member variables and public methods in a jQuery plugin?

    - by user169867
    I'm trying to create a jQuery plugin that will create something like an autoCompleteBox but with custom features. How do I store member variables for each matching jQuery element? For example I'll need to store a timerID for each. I'd also like to store references to some of the DOM elements that make up the control. I'd like to be able to make a public method that works something like: $("#myCtrl").autoCompleteEx.addItem("1"); But in the implementation of addItem() how can I access the member variables for that particular object like its timerID or whatever? Below is what I have so far... Thanks for any help or suggestions! (function($) { //Attach this new method to jQuery $.fn.autoCompleteEx = function(options) { //Merge Given Options W/ Defaults, But Don't Alter Either var opts = $.extend({}, $.fn.autoCompleteEx.defaults, options); //Iterate over the current set of matched elements return this.each(function() { var acx = $(this); //Get JQuery Version Of Element (Should Be Div) //Give Div Correct Class & Add <ul> w/ input item to it acx.addClass("autoCompleteEx"); acx.html("<ul><li class=\"input\"><input type=\"text\"/></li></ul>"); //Grab Input As JQ Object var input = $("input", acx); //Wireup Div acx.click(function() { input.focus().val( input.val() ); }); //Wireup Input input.keydown(function(e) { var kc = e.keyCode; if(kc == 13) //Enter { } else if(kc == 27) //Esc { } else { //Resize TextArea To Input var width = 50 + (_txtArea.val().length*10); _txtArea.css("width", width+"px"); } }); }); //End Each JQ Element }; //End autoCompleteEx() //Private Functions function junk() { }; //Public Functions $.fn.autoCompleteEx.addItem = function(id,txt) { var x = this; var y = 0; }; //Default Settings $.fn.autoCompleteEx.defaults = { minChars: 2, delay: 300, maxItems: 1 }; //End Of Closure })(jQuery);

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  • add text to the choice_label of ChoiceField in Django

    - by pablo
    The ChoiceField creates a select html element and the options show the choice_label which is the _unicode_ of each model object. How can I change the text of the choice_label without modifying _unicode_ ? I have a Product model and I want to show in the options text the product name + price + link to edit. I've searched in fields.py and widgets.py but couldn't find what needed to be changed. Thanks

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  • Lazy property loading in Nhibernate and Spring

    - by Khash
    I'm using NHibernate 2.1.2 and Spring 1.3 I have two Text columns (blobs) in one of my classes. I'm trying to use lazy="true" for the mapping of those properties but NHProfiler still shows the two columns being added to the SELECT statement when the main object is loaded. I'm using Spring.NHibernate session factory and have configured ProxyFactory with both Castle and Spring with no luck.

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  • Flex - communicating between Itemrenderes in a single row.

    - by TheCoolestSid
    Hi, I have a datagrid with an XML object as dataprovider. There are 2 columns in the datagrid which have comboboxes as their itemrenderers. The rendereriseditor property is also marked true. These itemrenderers are defined in their own mxml files. What i want is if the user selects a particular item in the combobox, say NA, then the value of the other combobox should also become NA. How can i achieve such a behavior? Thanks Sid

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  • Having trouble with a small example from school

    - by Kalec
    The example is from a course, it's for comparing two objects in java: public class Complex { ... public boolean equals (Object obj) { if (obj instanceof Complex) { // if obj is "Complex" (complex number) Complex c = (Complex) obj // No idea return (real == c.real) && (imag == c.imag); // I'm guessing real means [this].real } return false; } } So, my question is: "what does this: Complex c = (Complex) obj actually mean" ? Also I've worked with python and c++, java is new for me.

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  • QT vs. Net - REAL comparisons for R.A.D. projects

    - by Pirate for Profit
    Man in all these Qt vs. .NET discussions 90% these people argue about the dumbest crap. Trying to get a real comparison chart here, because I know a little about both frameworks but I don't know everything. I believe Qt and .NET both have strengths and weaknesses. This is to make a comparison that highlights these so people can make more informed decisions before embarking on a project, in the spirit of R.A.D. Event Handling In Qt the event handling system is very simple. You just emit signals when something cool happens and then catch them in slots. ie. // run some calculations, then emit valueChanged(30, false, 20.2); and then catching it, any object can make a slot to recieve that message easily void MyObj::valueChanged(int percent, bool ok, float timeRemaining). It's easy to "block" an event or "disconnect" when needed, and works seamlessly across threads... once you get the hang of it, it just seems a lot more natural and intuitive than the way the .NET event handling is set up (you know, void valueChanged(object sender, CustomEventArgs e). And I'm not just talking about syntax, because in the end the .NET anonymous delegates are the bomb. I'm also talking about in more than just reflection (because, yes, .NET obviously has much stronger reflection capabilities). I'm talking about in the way the system feels to a human being. Qt wins hands down for the simplest yet still flexible event handling system ever i m o. Plugins and such I do love some of the ease of C# compared to C++, as well as .NET's assembly architecture, even though it leads to a bunch of .dll's (there's ways to combine everything into a single exe though). That is a big bonus for modular projects, which are a PITA to import stuff in C++ as far as RAD is concerned. Database Ease of Doing Crap Also what about datasets and database manipulations. I think .net wins here but I'm not sure. Threading/Conccurency How do you guys think of the threading? In .NET, all I've ever done is make like a list of master worker threads with locks. I like QConcurrentFramework, you don't worry about locks or anything, and with the ease of the signal slot system across threads it's nice to get notified about the progress of things. QConcurrent is the simplest threading mechanism I've ever played with. Memory Usage Also what do you think of the overall memory usage comparison. Is the .NET garbage collector pretty on the ball and quick compared to the instantaneous nature of native memory management? Or does it just let programs leak up a storm and lag the computer then clean it up when it's about to really lag? Doesn't the just-in-time compiler make native code that is pretty good, like and that only happens the first time the program is run? However, I am a n00b who doesn't know what I'm talking about, please school me on the subject.

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  • How to apply global filter on Entity Framework?

    - by Hernan
    I have a table in my model named Customers with a field IsActive. Whenever I run a query on Customers, only the active customers should be retrieved. I can include the filter in every query, but that doesn't look very. I would like to be able to override the Customers property at the Object Context lever, but I am not sure if this is possible. Any help would be very appreciated! Thanks

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  • Query an XmlDocument without getting a 'Namespace prefix is not defined' problem

    - by Dan Revell
    I've got an Xml document that both defines and references some namespaces. I load it into an XmlDocument object and to the best of my knowledge I create a XmlNamespaceManager object with which to query Xpath against. Problem is I'm getting XPath exceptions that the namespace "my" is not defined. How do I get the namespace manager to see that the namespaces I am referencing are already defined. Or rather how do I get the namespace definitions from the document to the namespace manager. Furthermore tt strikes me as strange that you have to provide a namespace manager to the document which you create from the documents nametable in the first place. Even if you need to hardcode manual namespaces why can't you add them directly to the document. Why do you always have to pass this namespace manager with every single query? What can't XmlDocument just know? The Code: XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(programFiles + @"Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\FEATURES\HfscBookingWorkflow\template.xml"); XmlNamespaceManager ns = new XmlNamespaceManager(xmlDoc.NameTable); XmlNode referenceNode = xmlDoc.SelectSingleNode("/my:myFields/my:ReferenceNumber", ns); referenceNode.InnerXml = this.bookingData.ReferenceNumber; XmlNode titleNode = xmlDoc.SelectSingleNode("/my:myFields/my:Title", ns); titleNode.InnerXml = this.bookingData.FamilyName; ... The Xml: <?xml version="1.0" encoding="UTF-8" ?> <?mso-infoPathSolution name="urn:schemas-microsoft-com:office:infopath:Inspection:-myXSD-2010-01-15T18-21-55" solutionVersion="1.0.0.104" productVersion="12.0.0" PIVersion="1.0.0.0" ?> <?mso-application progid="InfoPath.Document" versionProgid="InfoPath.Document.2"?> - <my:myFields xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:my="http://schemas.microsoft.com/office/infopath/2003/myXSD/2010-01-15T18:21:55" xmlns:xd="http://schemas.microsoft.com/office/infopath/2003"> <my:DateRequested xsi:nil="true" /> <my:DateVisited xsi:nil="true" /> <my:ReferenceNumber /> <my:FireCall>false</my:FireCall> ...

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  • calling actionScript 2 function from C# help!

    - by phancuong87
    I want calling actionScript 2.0 function from c# , I using ExternalInterface.addCallback; In flash: ExternalInterface.addCallback("test", function (text : String) : Void { //code }); in C#: I using shockwave flash object player.CallFunction("" + "myString" + ""); but error: Error HRESULT E_FAIL has been returned from a call to a COM component. in C# I using cs4 and VS2008, please help me!

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  • What does slicing mean in C++?

    - by George2
    Hello everyone, It is mentioned in C++ FAQ site -- "larger derived class objects get sliced when passed by value as a base class object", what does slicing mean? Any sample to demonstrate? http://www.parashift.com/c++-faq-lite/value-vs-ref-semantics.html#faq-31.8 I am using VSTS 2008 + native C++ as my development environment. thanks in advance, George

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  • Exposing C# COM server events to Delphi client applications

    - by hectorsosajr
    My question is very similar to these two: http://stackoverflow.com/questions/1140984/c-component-events http://stackoverflow.com/questions/1638372/c-writing-a-com-server-events-not-firing-on-client However, what worked for them is not working for me. The type library file, does not have any hints of events definitions, so Delphi doesn't see it. The class works fine for other C# applications, as you would expect. COM Server tools: Visual Studio 2010 .NET 4.0 Delphi applications: Delphi 2010 Delphi 7 Here's a simplified version of the code: /// <summary> /// Call has arrived delegate. /// </summary> [ComVisible(false)] public delegate void CallArrived(object sender, string callData); /// <summary> /// Interface to expose SimpleAgent events to COM /// </summary> [ComVisible(true)] [GuidAttribute("1FFBFF09-3AF0-4F06-998D-7F4B6CB978DD")] [InterfaceType(ComInterfaceType.InterfaceIsIDispatch)] public interface IAgentEvents { ///<summary> /// Handles incoming calls from the predictive manager. ///</summary> ///<param name="sender">The class that initiated this event</param> ///<param name="callData">The data associated with the incoming call.</param> [DispId(1)] void OnCallArrived(object sender, string callData); } /// <summary> /// Represents the agent side of the system. This is usually related to UI interactions. /// </summary> [ComVisible(true)] [GuidAttribute("EF00685F-1C14-4D05-9EFA-538B3137D86C")] [ClassInterface(ClassInterfaceType.None)] [ComSourceInterfaces(typeof(IAgentEvents))] public class SimpleAgent { /// <summary> /// Occurs when a call arrives. /// </summary> public event CallArrived OnCallArrived; public SimpleAgent() {} public string AgentName { get; set; } public string CurrentPhoneNumber { get; set; } public void FireOffCall() { if (OnCallArrived != null) { OnCallArrived(this, "555-123-4567"); } } } The type library file has the definitions for the properties and methods, but no events are visible. I even opened the type library in Delphi's viewer to make sure. The Delphi app can see and use any property, methods, and functions just fine. It just doesn't see the events. I would appreciate any pointers or articles to read. Thanks!

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  • C# Spell checker Problem

    - by reggie
    I've incorporated spell check into my win forms C# project. This is my code. public void CheckSpelling() { try { // declare local variables to track error count // and information int SpellingErrors = 0; string ErrorCountMessage = string.Empty; // create an instance of a word application Microsoft.Office.Interop.Word.Application WordApp = new Microsoft.Office.Interop.Word.Application(); // hide the MS Word document during the spellcheck //WordApp.WindowState = WdWindowState.wdWindowStateMinimize; // check for zero length content in text area if (this.Text.Length > 0) { WordApp.Visible = false; // create an instance of a word document _Document WordDoc = WordApp.Documents.Add(ref emptyItem, ref emptyItem, ref emptyItem, ref oFalse); // load the content written into the word doc WordDoc.Words.First.InsertBefore(this.Text); // collect errors form new temporary document set to contain // the content of this control Microsoft.Office.Interop.Word.ProofreadingErrors docErrors = WordDoc.SpellingErrors; SpellingErrors = docErrors.Count; // execute spell check; assumes no custom dictionaries WordDoc.CheckSpelling(ref oNothing, ref oIgnoreUpperCase, ref oAlwaysSuggest, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing, ref oNothing); // format a string to contain a report of the errors detected ErrorCountMessage = "Spell check complete; errors detected: " + SpellingErrors; // return corrected text to control's text area object first = 0; object last = WordDoc.Characters.Count - 1; this.Text = WordDoc.Range(ref first, ref last).Text; } else { // if nothing was typed into the control, abort and inform user ErrorCountMessage = "Unable to spell check an empty text box."; } WordApp.Quit(ref oFalse, ref emptyItem, ref emptyItem); System.Runtime.InteropServices.Marshal.ReleaseComObject(WordApp); // return report on errors corrected // - could either display from the control or change this to // - return a string which the caller could use as desired. // MessageBox.Show(ErrorCountMessage, "Finished Spelling Check"); } catch (Exception e) { MessageBox.Show(e.ToString()); } } The spell checker works well, the only problem is when I try to move the spell checker the main form blurs up for some reason. Also when I close the spell checker the main form is back to normal. It seems like it is opening up Microsoft word then hiding the window, only allowing the spell checker to be seen. Please help.

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  • Programmatically retrieve a form template from a SharePoint library.

    - by Dan Revell
    So an InfoPath form is deployed to a SharePoint server. It gets deployed through central admin and then activated to a particular site collection. This site collection has a forms library with the appropriate content type for the activated InfoPath form. Using the object model, how can I retrieve the form template back out of SharePoint programmatically. I know the url to the web, name of the list and the name of the form itself.

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  • How to merge jquery autocomplete and fcbkListSelection functionality?

    - by Ben
    Initial caveat: I am a newbie to jquery and javascript. I started using the autocomplete jquery plugin recently from bassistance.de. Yesterday, I found the fcbkListSelection plugin (http://www.emposha.com/javascript/fcbklistselection-like-facebook-friends-selector.html) and am using it to include a selector in my application. What I now want to do is to merge the 2 pieces of functionality since there are lots of items in my selector list. To be more specific, I want to put a "Filter by Name" text box above the facebook list selection object in my html. When the user types a few characters into the "Filter by Name" text box, I want the items in the Facebook list selector to only show the items that contain the typed characters -- kind of like what autocomplete does already, but rather than the results showing below the text input box, I want them to dynamically update the facebook list object. Is this possible and relatively straightforward? If so, can somebody please describe how to do it? If not, is there an easier way to approach this? Thanks! OK, to Spencer Ruport's comment, I guess I may have a more specific question already. Below is the current Javascript in my HTML file (angle brackets represent Django tags). #suggest1 and #fcbklist both do their separate pieces, but how do I get them to talk to each other? Do I need to further write javascript in my HTML file, or do I need to customize the guts of the plugins' .js? Does this help elaborate? $(document).ready(function() { var names = []; var count = 0; {% for a, b, c in friends_for_picker %} names[count] = "{{ b }}"; count = count+1; {% endfor %} function findValueCallback(event, data, formatted) { $("<li>").html( !data ? "No match!" : "Selected: " + formatted).appendTo("#result"); } function formatItem(row) { return row[0] + " (<strong>id: " + row[1] + "</strong>)"; } function formatResult(row) { return row[0].replace(/(<.+?>)/gi, ''); } $("#suggest1").autocomplete(names, { multiple: true, mustMatch: false, autoFill: true, matchContains: true, }); //id(ul id),width,height(element height),row(elements in row) $.fcbkListSelection("#fcbklist","575","50","4"); });

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  • do console apps run faster than windows based app?

    - by omair iqbal
    i am reletivly new to world of programming i have a few performance questions 1. do console apps run faster than windows based app? 2.are languages like c and pascal faster than object oriented languages like c++ and delphi?i know language speed depends more on compiler than on language itself but do compilers for prcedural languages like c and pascal produce faster code than oo ones like delphi,c++(including c++ compilers that can procuce c code) sorry for my bad english

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  • How can I make WWW:Mechanize to not fetch pages twice?

    - by planetp
    I have a web scraping application, written in OO perl. There's single WWW::Mechanize object used in the app. How can I make it to not fetch the same url twice, i.e. make the second get() with the same url nop: my $mech = WWW::Mechanize->new(); my $url = 'http:://google.com'; $mech->get( $url ); # first time, fetch $mech->get( $url ); # same url, do nothing

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  • How to create aliases in c#

    - by Gaddigesh
    How do i create aliases in c# Take this scenario class CommandMessages { string IDS_SPEC1_COMPONENT1_MODULE1_STRING1; } say i create an object of this class CommandMessages objCommandMessage = new CommandMessages(); To i need to write lengthy string objCommandMessage.IDS_SPEC1_COMPONENT1_MODULE1_STRING1 every time i access the variable, this is a pain as i am using this variable as a key for a dictionary. Dict[objCommandMessage.IDS_SPEC1_COMPONENT1_MODULE1_STRING1] therefore i should be able to do something like this Dict[str1] where str1 is alias for objCommandMessage.IDS_SPEC1_COMPONENT1_MODULE1_STRING1, How do i do it?

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  • jQuery Adding DOM Elements

    - by Aren B
    This may be a simple answer, but I'm trying to add a dom-created element (i.e. document.createElement(...)) to a jQuery Selector. jQuery has a great assortment of functions for adding html .html(htmlString) .append(htmlString) .prepend(htmlString) But what i want to do is add a dom OBJECT var myFancyDiv = document.createElement("div"); myFancyDiv.setAttribute("id", "FancyDiv"); // This is the theoretical function im looking for. $("#SomeOtherDiv").htmlDom(myFancyDiv);

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