WCF：从OperationContext检索MethodInfo [英] WCF: Retrieving MethodInfo from OperationContext

问题描述

是否有一种优雅的方法可以从MessageInspector / AuthorizationPolicy /其他扩展点获取将在服务实例上执行的方法？我可以使用

Is there an elegant way to get the method that will be executed on a service instance from MessageInspector/AuthorizationPolicy/some other extension point? I could use

OperationContext.Current.IncomingMessageHeaders.Action

OperationContext.Current.IncomingMessageHeaders.Action

，但我希望有某种方法可以将SOAP操作与OperationContracts手动匹配。

but I hope there's some way to do it without manually matching SOAP actions with OperationContracts.

我要做的是在检查方法的属性之前

What I'm trying to do is examine the method's attributes before it executes.

推荐答案

花了我一辈子的时间，但我确实找到了一种比查找和拖延整个合同更好的方法：

It took me forever, but I did find a way that's better than finding and slogging through the entire contract:

string action = operationContext.IncomingMessageHeaders.Action;
DispatchOperation operation = 
    operationContext.EndpointDispatcher.DispatchRuntime.Operations.FirstOrDefault(o =>
        o.Action == action);
// Insert your own error-handling here if (operation == null)
Type hostType = operationContext.Host.Description.ServiceType;
MethodInfo method = hostType.GetMethod(operation.Name);

您在那里。您可以获取属性，也可以执行其他任何操作。

And there you are. You can get the attributes or do whatever else you like.

注意：您可能很想尝试在DispatchRuntime中使用OperationSelector。我发现的问题是，就我而言，在处理的特定阶段，OperationSelector是空引用。如果您可以访问此属性，则使用它可能比上面的扫描 OperationCollection更快，更可靠。

Note: You might be tempted to try to use the OperationSelector in the DispatchRuntime. The problem I found was that in my case, at the particular stage of processing, the OperationSelector was a null reference. If you have access to this property, it's probably faster and more reliable to use than "scanning" the OperationCollection as above.

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