【后端C#】后台通过http post 调用 webservice 的方法

定义http post 调用webservice的某个方法

/// <summary>    
    /// http Post调用  WebService  
    /// </summary>    
    public static XmlDocument Test1_QueryPostWebService(String URL,
        String MethodName, Hashtable Pars)
    {
        
 
 HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName);
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        request.Credentials = CredentialCache.DefaultCredentials;
        request.Timeout = 10000;
 
        #region 参数拼接成字符串，最后编码
        StringBuilder sb = new StringBuilder();
        foreach (string k in Pars.Keys)
        {
            if (sb.Length > 0)
            {
                sb.Append("&");
            }
            sb.Append(
                HttpUtility.UrlEncode(k) + "="
                + HttpUtility.UrlEncode(Pars[k].ToString())
                );
 
        }
        byte[] data = Encoding.UTF8.GetBytes(sb.ToString());
        #endregion
 
        #region  把编码后的参数写入请求流中
        request.ContentLength = data.Length;
        Stream writer = request.GetRequestStream();
        writer.Write(data, 0, data.Length);
        writer.Close();
        #endregion
 
        #region 读取结果，创建XmlDocument对象，对象加载结果
        var response = request.GetResponse();
        StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
        String retXml = sr.ReadToEnd();
        sr.Close();
        XmlDocument doc = new XmlDocument();
        doc.LoadXml(retXml);
        #endregion 
 
  return doc;
 
 
 
    }
 

调用实例：

protected void Page_Load(object sender, EventArgs e)
        {
            Hashtable pars = new Hashtable();
            String Url = "http://localhost:63596/WebService1.asmx";
            pars["aa"] = "HelenZhou";
            XmlDocument doc = WebSvcCaller.
                Test1_QueryPostWebService(Url,
                "MyHelloWorld",
                pars);
            Response.Write(doc.OuterXml); 
        }