上传图像使用c＃和Graph api进行提要

Question

我需要将图像发布到我的墙上（用图像更新状态）。我如何使用C＃和Graph Api（我不喜欢使用Facebook C＃SDK）来做到这一点。图像在我的桌面上。我已经发布了一些文字和链接到Facebook但没有对下面给出的代码进行成像

string profile = string.Format（“https://graph.facebook.com/ {0} / Photo？access_token = {1}＆amp; picture = {2}＆amp; message = {3}”，_ userId，_fb.AccessToken，@ “C：\用户\ SANTANA \桌面\ sa.jpg”， “fasdf”）;             WebRequest request = WebRequest.Create（profile）;

        // Set the Method property of the request to POST.
        request.Method = "POST";
        // Create POST data and convert it to a byte array.
        string postData = "This is a test that posts this string to a Web server.";
        byte[] byteArray = Encoding.UTF8.GetBytes(postData);
        // Set the ContentType property of the WebRequest.
        request.ContentType = "application/x-www-form-urlencoded";
        // Set the ContentLength property of the WebRequest.
        Stream dataStream = await request.GetRequestStreamAsync();
        // Write the data to the request stream.
        dataStream.Write(byteArray, 0, byteArray.Length);
        // Close the Stream object.
        dataStream.Dispose();
        // Get the response.
        WebResponse response = await request.GetResponseAsync();

        // Display the status.

        // Get the stream containing content returned by the server.
        dataStream = response.GetResponseStream();
        // Open the stream using a StreamReader for easy access.
        StreamReader reader = new StreamReader(dataStream);
        // Read the content.
        string responseFromServer = reader.ReadToEnd();
        // Display the content.
        tb.Text = responseFromServer;