C#实现HTTP协议POST请求

步骤

 

1. 编辑并Encoding提交的数据，格式类似 表单域名称1=值1&表单域名称2=值2&表单域名称3=值3……；

2. 发送请求（HttpWebRequest）；

3. 获得回复（HttpWebResponse）。

 

 private string PostRequest(string url, string[] paramName, string[] paramValue)
 {
     // 编辑并Encoding提交的数据
     StringBuilder sbuilder = new StringBuilder(paramName[0] + "=" + paramValue[0]);
     for (int i = 1; i < paramName.Length; i++)
         sbuilder.Append("&" + paramName[i] + "=" + paramValue[i]);
     byte[] data = new ASCIIEncoding().GetBytes(sbuilder.ToString());

     // 发送请求
     System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
     request.Method = "POST";
     request.ContentType = "application/x-www-form-urlencoded";
     request.ContentLength = data.Length;
     Stream stream = request.GetRequestStream();
     stream.Write(data, 0, data.Length);
     stream.Close();

     // 获得回复
     System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
     StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
     string result = reader.ReadToEnd();
     reader.Close();

     return result;
 }