C#使用GET、POST請求獲取結(jié)果

來源：本站原創(chuàng)|時間：2020-01-10|欄目：C#教程|點擊：次

C#使用GET、POST請求獲取結(jié)果，這里以一個簡單的用戶登陸為例。

1、使用GET請求獲取結(jié)果

1.1 創(chuàng)建LoginHandler.aspx處理頁面

protected void Page_Load(object sender, EventArgs e) 
{ 
  string result = ""; 
  string userName = Request.QueryString["UserName"]; 
  string password = Request.QueryString["Password"]; 
 
  if (userName == "admin" && password == "123") 
  { 
    result = "登陸成功"; 
  } 
  else 
  { 
    result = "登陸失敗"; 
  } 
  Response.Write(result); 
}

1.2 編寫GET請求與獲取結(jié)果方法

/// <summary> 
/// GET請求與獲取結(jié)果 
/// </summary> 
public static string HttpGet(string Url, string postDataStr) 
{ 
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr); 
  request.Method = "GET"; 
  request.ContentType = "text/html;charset=UTF-8"; 
 
  HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
  Stream myResponseStream = response.GetResponseStream(); 
  StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8); 
  string retString = myStreamReader.ReadToEnd(); 
  myStreamReader.Close(); 
  myResponseStream.Close(); 
 
  return retString; 
}

1.3 調(diào)用測試

static void Main(string[] args) 
{ 
  string url = "http://www.mystudy.cn/LoginHandler.aspx"; 
  string data = "UserName=admin&Password=123"; 
  string result = HttpGet(url, data); 
  Console.WriteLine(result); 
  Console.ReadLine(); 
}

2、使用POST請求獲取結(jié)果

2.1 創(chuàng)建LoginHandler.aspx處理頁面

protected void Page_Load(object sender, EventArgs e) 
{ 
  string result = ""; 
  string userName = Request.Form["UserName"]; 
  string password = Request.Form["Password"]; 
 
  if (userName == "admin" && password == "123") 
  { 
    result = "登陸成功"; 
  } 
  else 
  { 
    result = "登陸失敗"; 
  } 
  Response.Write(result); 
}

2.2 編寫POST請求與獲取結(jié)果方法

/// <summary> 
/// POST請求與獲取結(jié)果 
/// </summary> 
public static string HttpPost(string Url, string postDataStr) 
{ 
  HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url); 
  request.Method = "POST"; 
  request.ContentType = "application/x-www-form-urlencoded"; 
  request.ContentLength = postDataStr.Length; 
  StreamWriter writer = new StreamWriter(request.GetRequestStream(),Encoding.ASCII); 
  writer.Write(postDataStr); 
  writer.Flush(); 
  HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
  string encoding = response.ContentEncoding; 
  if (encoding == null || encoding.Length < 1) { 
    encoding = "UTF-8"; //默認編碼 
  } 
  StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding)); 
  string retString = reader.ReadToEnd(); 
  return retString; 
}

2.3 調(diào)用測試

static void Main(string[] args) 
{ 
  string url = "http://www.mystudy.cn/LoginHandler.aspx"; 
  string data = "UserName=admin&Password=123"; 
  string result = HttpPost(url, data); 
  Console.WriteLine(result); 
  Console.ReadLine(); 
}

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