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https://stackoverflow.com/questions/695752/how-to-design-a-product-table-for-many-kinds-of-product-where-each-product-has-m You have at least these fi 阅读全文
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When calling DbContext.SaveChanges, I get a DbUpdateException:An unhandled exception of type 'System.Data.Entity.Infrastructure.DbUpdateException' occ 阅读全文
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http://www.hanselman.com/blog/ListOfNETDependencyInjectionContainersIOC.aspxI'm trying to expand my mind around dependency injection in .NET (beyond t... 阅读全文
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http://social.msdn.microsoft.com/Forums/vstudio/en-US/d0bcb415-fb1e-42e4-90f8-c43a088537fb/aborting-a-long-running-task-in-tpl?forum=parallelextensionsI hesitate to show this :), but if you really did want to use aborts, you could do something like:int Foo(CancellationTokentoken){Threadt=Thread.Curr 阅读全文
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http://msdn.microsoft.com/en-us/library/dd537607.aspxusing System;using System.Collections.Concurrent;using System.Threading;using System.Threading.Tasks;public class Example{ public static void Main() { var tokenSource = new CancellationTokenSource(); var token = tokenSource.Token; ... 阅读全文
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I'd suggest checking for an inner exception. If there isn't one, check your logs for the exception that occurred immediately prior to this one.This isn't a web-specific exception, I've also encountered it in desktop-app development. In short, what's happening is that the thread r 阅读全文
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http://stackoverflow.com/questions/12424537/why-ienumerablet-is-defined-as-ienumerableout-t-not-ienumerabletThe out type parameter specifier denotes covariance.In practice,If I define two interfaces.ISomeInterface<T>{}ISomeCovariantInterface<out T>{}Then, I implement them like this.SomeC 阅读全文
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http://blogs.msdn.com/b/chrishays/archive/2004/07/23/horizontaltables.aspxQuestion:Does Reporting Services support horizontal tables (fixed rows and dynamic columns)?Answer:There is no native "horizontal table" report item, but simple horizontal tables can be simulated using Matrix.Step 1: 阅读全文
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[Serializable]public class MyViewModel : IEditableObject{ [NonSerialized] private object[] _copy; public MyViewModel() { Name = string.Empty; } public int Age { get; set; } public string Name { get; set; } public void BeginEdit() { //take a copy of curren... 阅读全文