POST data to WCF Service from WP7

Question

I am working on a WP7 application. If an error happens, I want to log the error back to my server. To handle this, I have created a WCF service operation. I want this operation to be REST ful so that I can later use it with iPhone and Android apps. Because I'm writing information to the database, I thought the POST method would be best. For this reason, I'm using WebInvoke. To do this, I'm using the following code:

[OperationContract]
[WebInvoke(UriTemplate = "/LogError/{message}/{stackTrace}", ResponseFormat = WebMessageFormat.Json)]
public void LogError(string message, string stackTrace)
{
  // Write info to the database
}

From my WP7 app, I want to call this operaiton via a WebClient. My question is, how do I do that? I don't understand how to call the LogError operation and pass along the required data via the WebClient.

Thank you for your help!

Answer 1

If I am getting your Service method correctly, that method is not a POST method. You can just call that with a WebClient

WebClient wc = new WebClient()
Uri uri = new Uri("http://yourUri/LogError/ABC/XYZ"); //ABC is your message and XYZ is your stacktrace string.
wc.DownloadStringAsync(uri);

Or if you are thinking about real HTTP 'POST' then below might help. You can use HttpWebRequest to do a POST on to any service which is accepting POST

This link may be helpful - WCF REST POST XML - The remote server returned an error: (400) Bad Request

Answer 2

Something along the lines:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://serveraddress/LogError/{message}/{stackTrace}");

If you would want to send additional information later on, you can do so with:

request.Method = "POST";
request.BeginGetRequestStream(new AsyncCallback(ExecuteAction), request);

And have a callback:

void ExecuteAction(IAsyncResult result)
{
    HttpWebRequest request = (HttpWebRequest)result.AsyncState;
    using (Stream s = request.EndGetRequestStream(result))
    {
        s.Write(data, 0, data.Length);
    }
}

If there is a specific string response from the service, you might as well include the data in the WebClient and use DownloadStringAsync to get the response data.