.net-4.0-beta-2 | 易学教程

OptimisticConcurrencyException — SQL 2008 R2 Instead of Insert Trigger with Entity Framework

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问题 Using a SQL 2008 R2 November release database and a .net 4.0 Beta 2 Azure worker role application. The worker role collects data and inserts it into a single SQL table with one identity column. Because there will likely be multiple instances of this worker role running, I created an Insert Instead Of trigger on the SQL table. The trigger performs Upsert functionality using the SQL Merge function. Using T-SQL I was able to verify the insert instead of trigger functions correctly, new rows were

Can I (and how do I) target .net 4 with vs 2008?

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问题 VS2010 beta 2 is sloowwww on my machine. I'd like to start playing with .net 4 though. Can my vs 2008 solution's target .net 4 beta 2? How? 回答1: No, you can't target .NET 4.0 using VS 2008. To speed up, you can try to create this key in Registry (worked for me): [HKEY_CURRENT_USER\Software\Microsoft\Avalon.Graphics] "DisableHWAcceleration"=dword:00000001 More info here Visual Studio 2010 Beta 2 editor performance fix running on a virtual machine and Graphics Rendering Registry Settings 回答2:

Could not load file or assembly 'AjaxControlToolkit' after upgrade to .net 4.0

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问题 I have a web application that I am attempting to upgrade to .net 4.0. I took the application and opened it via Visual Studio 2010 Beta 2 and selected the upgrade path for that application. The application uses the AjaxControlToolkit. Now that the upgrade is complete when I attempt to access a page I get the error message: "Could not load file or assembly 'AjaxControlToolkit' or one of its dependencies. Access is denied." I've tried: Restarting my machine Clean Solution Removing all files in

Where can I find .Net 4 installer?

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问题 I want to download .Net 4, but I can't find it. Where can I find it for installing it offline? 回答1: Here's the offline redistributable installer for just .NET 4.0 beta 2 (not VS2010). 来源： https://stackoverflow.com/questions/1686629/where-can-i-find-net-4-installer

Entity Framework error when submitting empty fields

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问题 VS 2010 Beta 2, .NET 4. In my ASP.NET MVC 2 application, when I submit a form to an action method that accepts an object created by the entity framework, I get the following error: Exception Details: System.Data.ConstraintException: This property cannot be set to a null value. Source Error: Line 4500: OnTextChanging(value); Line 4501: ReportPropertyChanging("Text"); Line 4502: _Text = StructuralObject.SetValidValue(value, false); Line 4503: ReportPropertyChanged("Text"); Line 4504:

How to make PLINQ to spawn more concurrent threads in .NET 4.0 beta 2?

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问题 In former versions of Parallel Extensions you could set the number of threads: enumerable.AsParallel(numberOfThreads) But now that overload is not available anymore. How to do it now? 回答1: In the new version you can specify it with the extension method ".WithDegreeOfParallelism(int degreeOfParallelism)". IE: enumerable.AsParallel().WithDegreeOfParallelism(numberOfThreads) 回答2: I really have no idea why it changed, so I can't answer the question, but it seems like if the developer specifies

Can I (and how do I) target .net 4 with vs 2008?

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VS2010 beta 2 is sloowwww on my machine. I'd like to start playing with .net 4 though. Can my vs 2008 solution's target .net 4 beta 2? How? No, you can't target .NET 4.0 using VS 2008. To speed up, you can try to create this key in Registry (worked for me): [HKEY_CURRENT_USER\Software\Microsoft\Avalon.Graphics] "DisableHWAcceleration"=dword:00000001 More info here Visual Studio 2010 Beta 2 editor performance fix running on a virtual machine and Graphics Rendering Registry Settings No you can't you need at least visual studio 2010 to target .net 4.0 来源： https://stackoverflow.com/questions