Handling Faults and Exceptions on WCF Clients– Explained
Handling Service Exceptions on WCF Clients
A WCF client must expect various types of exception when calling services
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Unexpected Exceptions in a Trusted Environment in a WCF Service
When an unexpected exception occurs, the WCF runtime generates a FaultException and sends it to the client.
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Applying Consistent Error Handling to WCF Service
It is good practice to add an outer try block to all of your service operations; the try block should encompass all of the code that is inside those operations.
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Using Typed and Untyped Faults in WCF Service
Typed faults enable you to define custom data types to represent specific errors that occur in your WCF service.
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Designing WCF Service Error Handling
It is important that your service handles errors so that it can continue to execute if an error occurs. There are three main categories of errors that your service should handle.
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Faults in WCF Service Metadata
If a service operation has a fault contract defined for it, the fault definitions form part of the service metadata from which you can generate client-side artifacts. As an example, consider the following fault contract.
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Structure of a SOAP Fault
A SOAP fault is an XML representation of error information that is generated when a SOAP call fails. A SOAP fault contains several elements that you can use when defining your strategy for the transmission of error information:
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Mapping .Net Framework Exceptions to SOAP Faults
Errors are an important part of a service contract, even though some contracts omit them for brevity. Specifying the errors that can occur in a service forms an important part of the design-by-contract approach to defining service operations.
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What’s the problem with Using .NET Framework Exceptions in WCF Services?
Many applications and components in the .NET Framework use exceptions to indicate error conditions. Exceptions are an in-process error-reporting mechanism that automatically propagate up the call chain until they hit a user interface or process boundary.
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SharePoint Error: Failed to connect to the configuration database
Error:
Failed to connect to the configuration database.
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