C# – How to prevent a WCF service from enter a faulted state

.netc++msmqwcf

I have a WCF Service that should not enter the faulted state. If there's an exception, it should be logged and the service should continue uninterrupted. The service has a one-way operation contract and is reading messages from an MSMQ.

My problems are twofold:

The service appears to be swallowing
an exception/fault so I am unable to
debug it. How do I get the service
to expose the exception so that I
can log or handle it?
The service is
entering into a faulted state after
this exception is swallowed. How do
I prevent the service from entering
into a faulted state?

Best Solution

The official documentation on how to handle Faults is here:

with the main page being at Channel Model Overview

There's a nice state diagram showing how things happen:

enter image description here

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The simplest way is an anonymous method passed into Label.Invoke:

// Running on the worker thread
string newText = "abc";
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// Back on the worker thread

Notice that Invoke blocks execution until it completes--this is synchronous code. The question doesn't ask about asynchronous code, but there is lots of content on Stack Overflow about writing asynchronous code when you want to learn about it.

C# – Windows service start order causes faulted state in WCF Service

You can specify the startup order using the serivce dependency. That is stop the WCF service from starting before the MSMQ service. See: https://serverfault.com/questions/84181/can-the-startup-order-for-windows-services-be-configured-if-so-where

Best Solution

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C# – How to update the GUI from another thread

C# – Windows service start order causes faulted state in WCF Service

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