C#使用GET、POST请求获取结果

2020-01-24 00:51:27

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C#使用GET、POST请求获取结果，这里以一个简单的用户登陆为例。

1、使用GET请求获取结果

1.1 创建LoginHandler.aspx处理页面

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 = "登陆成功";   }   else   {     result = "登陆失败";   }   Response.Write(result); }

1.2 编写GET请求与获取结果方法

/// <summary> /// GET请求与获取结果 /// </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 调用测试

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请求获取结果

2.1 创建LoginHandler.aspx处理页面

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 = "登陆成功";   }   else   {     result = "登陆失败";   }   Response.Write(result); }

2.2 编写POST请求与获取结果方法

/// <summary> /// POST请求与获取结果 /// </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"; //默认编码   }   StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));   string retString = reader.ReadToEnd();   return retString; }

2.3 调用测试

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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