WP7-将MessageHeader添加到WCF Soap服务调用

Question

I've spent the last two days trying to configure my WP7 app to send message headers to my WCF Soap Service. I'm simply trying to send a string of information on every call.

There is an abundance of guides online but I can't seem to piece them together to get what I want done and could really do with some help.

So - could somebody please help me with the SIMPLEST way to add a message inspector to my service and attach headers from within my app?

Thanks!

Answer 1

For WP7 - there's no "simple" way to do that. Most extensibility points in WCF aren't present in the WP7 platform, so you have a couple of alternatives.

The easiest way is to use the OperationContext to add outgoing message headers. It's fairly simple (see below), but you need to do that for every operation you call:

var client = new ServiceReference1.MyServiceClient();
client.OperationCompleted += ...;
using (new OperationContextScope(client.InnerChannel))
{
    OperationContext.Current.OutgoingMessageHeaders.Add(
        MessageHeader.CreateHeader(
            "headerName", "http://header.namespace", "the value"));
    client.OperationAsync(param1, param2);
}

If doing that in all operations is too much, an alternative is to create a class which wraps the client, and does that for all the operations. Still a lot of code, but at least it will be concentrated in one point, instead of being spread throughout your application.

The last alternative (which I can remember now) is to use message inspectors. They're not part of the platform, but depending on your scenario, I've implemented one support for inspectors / formatters as shown in the blog post at http://blogs.msdn.com/b/carlosfigueira/archive/2011/06/21/wcf-extensibility-extensibility-in-windows-phone-and-silverlight-3.aspx . For simple scenarios it should work fine.