.net-4.0

问题 I have the following XAML: <dxg:GridControl Name="theGrid" DataSource="{Binding Path=Groupings}"> <dxg:GridControl.ContextMenu> <ContextMenu> <MenuItem x:Name="gridprint" Command="{Binding Path=GridPrintCommand}"/> </ContextMenu> </dxg:GridControl.ContextMenu> </dxg:GridControl> When GridPrintCommand executes, its parameter to the GridPrintCommand.Execute(param) method is null. I want to set the parameter to the grid control. I can do that in the code-behind like this: gridprint

问题 I'm having a problem with assembly resolution on an end-user machine and I believe it's related to using Portable Class Libraries.... I have a .NET 4.0 application that was originally written in Visual Studio 2010. Recently we upgraded to Visual Studio 2012 and we've created a few projects that are Portable Class Libraries. I don't believe we need these features now, but we're also building a Windows 8 Store application that might benefit from these libraries. When I compile my project, what

问题 I'm having a problem with assembly resolution on an end-user machine and I believe it's related to using Portable Class Libraries.... I have a .NET 4.0 application that was originally written in Visual Studio 2010. Recently we upgraded to Visual Studio 2012 and we've created a few projects that are Portable Class Libraries. I don't believe we need these features now, but we're also building a Windows 8 Store application that might benefit from these libraries. When I compile my project, what

问题 I've got Code Contracts working fine from inside Visual Studio 2010, but I can't get ccrewrite.exe to do anything useful from the command line. Here's a sample app: using System.Diagnostics.Contracts; public class Dummy { public static void Main(string[] args) { Contract.Requires(args.Length > 0); } } I then compile the code and run ccrewrite.exe on it: > csc /debug+ /D:CONTRACTS_FULL Dummy.cs > ccrewrite /o:RewrittenDummy.exe Dummy.exe elapsed time: 61ms There's no RewrittenDummy.exe file

问题 What I'd like to use: 2009 XAML primitives How it would be nice to use them: <sapv:ExpressionTextBox xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" ExpressionType="x:String" /> What actually happens: "Type reference cannot find the public type named String" The examples I see don't have updated namespaces. I tried 2009 and 2010, but to no avail. This is in VS 2010 RTM. What am I doing wrong? 回答1: I believe the key sentence on the documentation page is this: In WPF, you can use XAML

问题 I need to use EF5 on .NET 4 and I've run into a reference issue when mapping my class with HasDatabaseGenerationOption.Identity which doesn't exist in the 4.0 version of the library. The following is failing: this.Property(t => t.DeploymentLogId) .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity); Does anyone know of a work around? 回答1: Using NuGet to add EntityFramework to a project that targets .NET 4.5, will add EntityFramework 5.0. If you later change the project to target .NET

问题 I need to use EF5 on .NET 4 and I've run into a reference issue when mapping my class with HasDatabaseGenerationOption.Identity which doesn't exist in the 4.0 version of the library. The following is failing: this.Property(t => t.DeploymentLogId) .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity); Does anyone know of a work around? 回答1: Using NuGet to add EntityFramework to a project that targets .NET 4.5, will add EntityFramework 5.0. If you later change the project to target .NET

问题 This is slightly related to the question asked here yet the answer does not apply to my case as I am not using threads: WPF Not closing properly I have converted one of my WinForm application to a WPF application, nothing drastic needed to be done except for change a few words to the WPF/C# 4.0 equivalents (MessageBoxButtons to MessageBoxButton, why the one letter difference?). Anyway, if I run the application through the debugger it runs fine until I come to close it with the "X" button to

问题 I am working on a .NET 4 MVC 3 application. I'm trying to follow a domain driven design paradigm. Right now, my application is broken into two pieces, a domain and my MVC code for the web. I'd like some help in determining where in this structure I should consume a RESTful web service. This specific project uses a RESTful web service to retrieve and persist data. In my domain, I have two entities "Customer" and "User" which pair up with web services of the same name. e.g. URL/Customer and URL

问题 I read that with .NET Framework 4 the current garbage collection implementation is replaced: The .NET Framework 4 provides background garbage collection. This feature replaces concurrent garbage collection in previous versions and provides better performance. At this page there is an explanation how it works but I am not sure I understood it. In practical world application what is the benefit of this new GC implementation? Is it a feature that could be use to push for a transition from 3.5 or