利用HttpWebRequest请求ArcIMS地图服务

其实ArcIMS请求地图服务的基本原理是向ArcIMS发送ArcXML。ArcXML自带的HtmlViewer例子是通过jsForm提交的。下面利用.net自带的类HttpWebRequest实现ArcIMS发送ArcXML请求。

private void SendArcXML(string ArcXML)
        {
            try
            {
                string strRequest = ArcXML;
                //创建HttpWebRequest对象。
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(@http://ArcIMS服务器机器名或IP地址/servlet/com.esri.esrimap.Esrimap?ServiceName=地图服务名称&ClientVersion=4.0&Form=False&Encode=False);
                request.Method = "POST";
                request.AllowAutoRedirect = true;
                request.MaximumAutomaticRedirections = 1;
                Encoding encoding = Encoding.GetEncoding("gb2312");
                byte[] byte1 = encoding.GetBytes(strRequest);
                request.ContentType = @"application/x-www-form-urlencoded";
                request.ContentLength = byte1.Length;
                request.Headers.Add(HttpRequestHeader.AcceptLanguage, "zh-cn");
                Stream stream = request.GetRequestStream();
                stream.Write(byte1, 0, byte1.Length);
                stream.Close();
                //接收请求
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream stream2 = response.GetResponseStream();
                StreamReader sReader = new StreamReader(stream2, Encoding.Default);
                //strResponse就是回送的ArcXML
                string strResponse = sReader.ReadToEnd();
                sReader.Close();
                stream2.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }