blocks|key|3555755|text|您是否正在使用Silverlight的WCF服务？如果是，则需要进行特殊配置，使服务在出现错误时返回HTTP+200代码，而不是500。详细信息在这里：http://msdn.microsoft.com/en-us/library/dd470096%2528VS.96%2529.aspx|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3555756|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/dd470096%2528VS.96%2529.aspx^0|24|1S|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Are you consuming the WCF service from Silverlight? If so, a special configuration is needed to make the service return a HTTP 200 code instead of 500 in case of error. The details are here: <a href="http://msdn.microsoft.com/en-us/library/dd470096%28VS.96%29.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/dd470096%28VS.96%29.aspx</a>

blocks|key|481658|text|实际上，您的异常被捕获，但您没有注意到它，因为visual+studio突出显示下一行，而不是抛出异常的行。替换|type|unstyled|depth|inlineStyleRanges|entityRanges|data|481659|throw;|code-block|syntax|javascript|481660|使用其他一些行，并查看它们的实际效果。|481661|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Actually your exception is caught but you fail to notice it since visual studio highlights the next line, not the line throwing the exception. Replace

<pre><code>throw;
</code></pre>

with some other lines and see them in action.

blocks|key|2396824|text|仔细看看捕获的异常。是FaultException<+FooFault>还是FaultException？FaultException类有两个版本：generic和non-generic|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2396825|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ms576199.aspx|1^0|22|7|0|2A|B|1|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@$A|N|B|O|1|P]|$A|Q|B|R|1|S]]|C|$]]|$1|D|3|-4|5|6|7|T|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|K]]]]

Take a closer look at catched exception. Was it FaultException&lt; FooFault> or FaultException ? There are 2 version of FaultException class: <a href="http://msdn.microsoft.com/en-us/library/ms576199.aspx" rel="nofollow noreferrer">generic</a> and <a href="http://msdn.microsoft.com/en-us/library/ms576199.aspx" rel="nofollow noreferrer">non-generic</a>

blocks|key|5667418|text|@yapiskan，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5667419|C#是一种强类型语言Foo<+X>+!=+Foo。因此，如果需要捕获某些异常，请在catch子句中提供确切类型。|5667420|您可以阅读this+MSDN文章了解有关异常处理的更多信息。|offset|length|5667421|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ms229005.aspx^0|0|0|5|4|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

@yapiskan,

C# is a strong typed language Foo&lt; X> != Foo. So if you need to catch some exception, provide exact type in catch clause.

You can learn more on exception handling reading <a href="http://msdn.microsoft.com/en-us/library/ms229005.aspx" rel="nofollow noreferrer">this</a> MSDN article.

blocks|key|5667482|text|问题是异常是按照声明的顺序进行检查的。尝试将异常catch块放在第一位，您将看到编译器报错:其他catch块将永远不会被求值。以下代码通常是.Net在您的案例中执行的操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5667483|++++++++//+Begin+try
+++++++++++++DoSomething();+//+throws+FaultException<FooFault>
++++++++//+End+try
++++++++if+(exceptionOccured)
++++++++{
++++++++++++if(exception+is+FaultException)+//+FE+catch+block.
++++++++++++{
++++++++++++++++throw;
++++++++++++++++//+Goto+Exit
++++++++++++}
++++++++++++if(exception+is+Exception)+//+EX+catch+block
++++++++++++{
++++++++++++++++throw+new+FaultException<FooFault>();
++++++++++++++++//+Goto+Exit
++++++++++++}
++++++++}

++++++++//+Exit|code-block|syntax|javascript|5667484|正如你所看到的，你的FaultException永远不会重新进入try-catch-finally+(即try-catch-finally本质上不是递归的)。|5667485|试着这样做：|5667486|++++++++try
++++++++{
++++++++++++try
++++++++++++{
++++++++++++++++DoSomething();+//+throws+FaultException<FooFault>
++++++++++++}
++++++++++++catch+(Exception+ex)
++++++++++++{
++++++++++++++++if+(ex+is+FaultException<FooFault>)
++++++++++++++++++++throw;
++++++++++++++++else
++++++++++++++++++++myProject.Exception.Throw<FooFault>(ex);
++++++++++++}
++++++++}
++++++++catch+(FaultException)
++++++++{
++++++++++++throw;
++++++++}|5667487|HTH。|5667488|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

The problem is that exceptions are checked in the order they are declared. Try putting the Exception catch block first and you will see that the compiler complains: other catch blocks will NEVER be evaluated. The following code is generally what .Net is doing in your case:

<pre><code> // Begin try
 DoSomething(); // throws FaultException&lt;FooFault&gt;
 // End try
 if (exceptionOccured)
 {
 if(exception is FaultException) // FE catch block.
 {
 throw;
 // Goto Exit
 }
 if(exception is Exception) // EX catch block
 {
 throw new FaultException&lt;FooFault&gt;();
 // Goto Exit
 }
 }

 // Exit
</code></pre>

As you can see your FaultException never re-enters the try-catch-finally (i.e. try-catch-finally is not recursive in nature).

Try this instead:

<pre><code> try
 {
 try
 {
 DoSomething(); // throws FaultException&lt;FooFault&gt;
 }
 catch (Exception ex)
 {
 if (ex is FaultException&lt;FooFault&gt;)
 throw;
 else
 myProject.Exception.Throw&lt;FooFault&gt;(ex);
 }
 }
 catch (FaultException)
 {
 throw;
 }
</code></pre>

HTH.

i have a wcf service that does an operation. and in this operation there could be a fault. i have stated that there could be a fault in my service contract. 

here is the code below;

<pre><code>public void Foo()
{
 try
 {
 DoSomething(); // throws FaultException&lt;FooFault&gt;
 }
 catch (FaultException)
 {
 throw;
 }
 catch (Exception ex)
 {
 myProject.Exception.Throw&lt;FooFault&gt;(ex);
 }
}
</code></pre>

in service contract;

<pre><code>[FaultException(typeof(FooFault))]
void Foo();
</code></pre>

when a FaultException was thrown by DoSomething() method while i was running the application, firstly the exception was caught at "catch(Exception ex)" line and breaks in there. then when i pressed f5 again, it does what normally it has to. i wonder why that break exists? and if not could it be problem on publish?

Cannot handle FaultException

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个执行操作的wcf服务。在此操作中，可能存在故障。我已经说过，我的服务合同中可能存在错误。下面是代码；public void Foo(){ try { DoSomething(); // throws FaultException<FooFault> } catch (FaultException)

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