This article demo has been uploaded to GitHub: xinyuehtx / WCFdemo
This blog will explain how to set up the service of abnormal feedback
Among multi-process debugging, or client / server FBI, very troublesome point is how to locate an anomaly?
Client problem or server problem, or is it the channel problem?
This time by abnormal abnormal information back to the server to the client feedback occurs it is very important.
Error Agreement (FaultContract)
Service operations can mark an error agreements show that this method might specify error.
Example we SayHellospecifies an exceptional method agreement, indicates that information might throw the details ServiceFaultof the exception.
And ServiceFaultis a sequence of a tag of data type by the agreement. Here we did a packaging method by which abnormal, and the method name.
In the service implementation, we by throwing FaultExceptionthe ServiceFaultpackage, delivered to the client
Our client will print out an exception by trycatch
Success can see abnormal output
The risk of error Agreement
Smart students have already noticed, we just test the operation of the agreement is (synchronous method) request reply mode. What then for the one-way pattern here?
We will try IsOneWaytoTrue
An exception is thrown slightly, the method can not be used the wrong way agreement
summary
We studied the mistakes agreement WCF service, its features are
- Basic information can specify the server error echo client, you can pass all managed through a simple package of abnormal
- Objects may be passed agreement needs serialized data protocol
- One-way operation can not handle
Reference links:
- How to: Declare error in Service Contracts - Microsoft Docs
- Define and specify the error - Microsoft Docs
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