WebRequest request = WebRequest.Create("http://www.cnsos.net"); // Set the Method property of the request to POST. request.Method = "POST"; // Create POST data and convert it to a byte array. System.Xml.XmlDocument xmlpostdata = new System.Xml.XmlDocument(); xmlpostdata.Load(Server.MapPath("XML/20097.xml")); string postData = HttpUtility.HtmlEncode(xmlpostdata.InnerXml); //普通字符串内容 //string postData = "你好，1232355 abdcde"; 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. request.ContentLength = byteArray.Length; // Get the request stream. Stream dataStream = request.GetRequestStream(); // Write the data to the request stream. dataStream.Write(byteArray, 0, byteArray.Length); // Close the Stream object. dataStream.Close(); // Get the response. WebResponse response = request.GetResponse(); // Display the status. //Console.WriteLine(((HttpWebResponse)response).StatusDescription); // 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. //Console.WriteLine(responseFromServer); // Clean up the streams. reader.Close(); dataStream.Close(); response.Close();