C#使用GET、POST请求获取结果

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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

<span style="font-size:18px;">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);}</span>

1.2 编写GET请求与获取结果方法

<span style="font-size:18px;">/// <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;}</span>

1.3 调用测试

<span style="font-size:18px;">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();}</span>

2、使用POST请求获取结果

2.1 创建LoginHandler.aspx处理页面

<span style="font-size:18px;">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);}</span>

2.2 编写POST请求与获取结果方法

<span style="font-size:18px;">/// <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;}</span>

2.3 调用测试

<span style="font-size:18px;">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();}</span>

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