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NullReferenceException from wcf service [closed]

开发者 https://www.devze.com 2023-03-03 13:04 出处:网络
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.

This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.

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I have a wcf service which I use Miquels Castro's technique, instead of user the service reference create by VS.NET 2010.

Everything worked gre开发者_如何学运维at until I added a new method. When I added the new method I got a error message:

A first chance exception of type 'System.ServiceModel.FaultException`1' occurred in mscorlib.dll

Additional information: Object reference not set to an instance of an object.

Then

An unhandled exception of type 'System.Runtime.Serialization.SerializationException' occurred in Unknown Module.

Additional information: Type 'System.ServiceModel.ExceptionDetail' in Assembly 'System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable.

The code hits the proxy class:

public DataTable GetResearchSellingTitles(string network, string year, 
    string quarter)
{
    return Channel.GetResearchSellingTitles(network, year, quarter);
}

I have added the method to the interface and implemented it. Any ideas how to determine the root of the issue?

Update I solved the issue. It had nothing to do with th WCF service setup. What is weird is where I had where the null reference error, it was surrounded by a try catch. I also had a log util that log the error. I am not sure why it just didn't catch the error, log it and return a empty datatable. Thanks for all the suggestions.

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