HttpContext.Current is null in my web service

问题

I have a web service (.svc), and I am trying to capture the SOAP request using a piece of code found elsewhere on StackOverflow.

The problem is that HttpContext.Current is null, so I can't access Request.InputString.

Why is this null, and how can it be solved?

XmlDocument xmlSoapRequest = new XmlDocument();

Stream receiveStream = HttpContext.Current.Request.InputStream;
receiveStream.Position = 0;

using (StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8))
{
    xmlSoapRequest.Load(readStream);
}

回答1:

If you want to use HttpContext because the code has already been written as so; you need to add this to your web.config where your service resides:

<configuration>
    <system.serviceModel>
        <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
    </system.serviceModel>
</configuration>

回答2:

From one of Microsoft's pages on the subject.

HttpContext: Current is always null when accessed from within a WCF service. Use RequestContext instead.

回答3:

Correct else use below to read header

 var headers = OperationContext.Current.IncomingMessageProperties["httpRequest"];
                var apiToken = ((HttpRequestMessageProperty)headers).Headers["apiKey"];

回答4:

Please see How to get working path of a wcf application? Use System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath

来源：https://stackoverflow.com/questions/8976767/httpcontext-current-is-null-in-my-web-service