向Rest Service提交XML时出现问题

Question

我正在使用一个REST web服务，该服务使用基本身份验证并向我返回一个XML字符串。以下是我用来获取数据并将其作为XDocument返回的方法：

        var req = (HttpWebRequest)WebRequest.Create(uri);
        String readToEnd;
        const string postData = "";
        var encoding = new ASCIIEncoding();
        byte[] byte1 = encoding.GetBytes(postData);
        req.Method = "POST";
        req.Timeout = 10000;
        req.ContentType = "text/XML";
        req.ContentLength = byte1.Length;
        string authInfo = userName + ":" + password;
        authInfo = Convert.ToBase64String(Encoding.UTF8.GetBytes(authInfo));
        req.Headers["Authorization"] = "Basic " + authInfo;
        var newStream = req.GetRequestStream();
        newStream.Write(byte1, 0, byte1.Length);
        newStream.Close();
        try
        {
            var resp = req.GetResponse();
            var answer = resp.GetResponseStream();
            var _answer = new StreamReader(answer);
            readToEnd = _answer.ReadToEnd();
            answer.Close();
        }
        catch (Exception ex)
        {
            readToEnd = null;
        }
        return readToEnd != null ? XDocument.Parse(readToEnd) : null;

现在，稍后，我已经处理了xml，并准备将其发布回另一个uri。我认为这将是相同的代码，只是可能将我的新XML字符串放入变量"postData"中？

这是向Web服务发布xml字符串的正确方式吗？当使用基本授权时，我已经看了，但似乎无法对此进行任何说明。

Answer 1

我执行以下操作。关键是，在发布之前，您必须将数据写入请求流。希望能有所帮助。

 var request = CreateBaseRequest(body);
        HttpWebResponse WebResp = (HttpWebResponse)request.GetResponse();
        Stream Answer = WebResp.GetResponseStream();
        StreamReader response = new StreamReader(Answer);
        var r = response.ReadToEnd();
 static HttpWebRequest CreateBaseRequest(string postData)
    {
        var req = (HttpWebRequest)HttpWebRequest.Create(@"https://xyz.com/");
        req.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
        req.Method = "POST";
        req.KeepAlive = true;
        byte[] buffer = Encoding.ASCII.GetBytes(postData);
        req.ContentLength = buffer.Length;
        Stream PostData = req.GetRequestStream();
        PostData.Write(buffer, 0, buffer.Length);
        PostData.Close();
        return req;
    }