使用GET,POST请求获取结果

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

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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

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1. /// <summary>  
2. /// GET请求与获取结果  
3. /// </summary>  
4. public static string HttpGet(string Url, string postDataStr)  
5. {  
6.     HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr);  
7.     request.Method = "GET";  
8.     request.ContentType = "text/html;charset=UTF-8";  
9.   
10.     HttpWebResponse response = (HttpWebResponse)request.GetResponse();  
11.     Stream myResponseStream = response.GetResponseStream();  
12.     StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);  
13.     string retString = myStreamReader.ReadToEnd();  
14.     myStreamReader.Close();  
15.     myResponseStream.Close();  
16.   
17.     return retString;  
18. }  

/// <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

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1. static void Main(string[] args)  
2. {  
3.     string url = "http://www.mystudy.cn/LoginHandler.aspx";  
4.     string data = "UserName=admin&Password=123";  
5.     string result = HttpGet(url, data);  
6.     Console.WriteLine(result);  
7.     Console.ReadLine();  
8. }  

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

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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

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1. /// <summary>  
2. /// POST请求与获取结果  
3. /// </summary>  
4. public static string HttpPost(string Url, string postDataStr)  
5. {  
6.     HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);  
7.     request.Method = "POST";  
8.     request.ContentType = "application/x-www-form-urlencoded";  
9.     request.ContentLength = postDataStr.Length;  
10.     StreamWriter writer = new StreamWriter(request.GetRequestStream(),Encoding.ASCII);  
11.     writer.Write(postDataStr);  
12.     writer.Flush();  
13.     HttpWebResponse response = (HttpWebResponse)request.GetResponse();  
14.     string encoding = response.ContentEncoding;  
15.     if (encoding == null || encoding.Length < 1) {  
16.         encoding = "UTF-8"; //默认编码  
17.     }  
18.     StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));  
19.     string retString = reader.ReadToEnd();  
20.     return retString;  
21. }  

/// <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

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1. static void Main(string[] args)  
2. {  
3.     string url = "http://www.mystudy.cn/LoginHandler.aspx";  
4.     string data = "UserName=admin&Password=123";  
5.     string result = HttpPost(url, data);  
6.     Console.WriteLine(result);  
7.     Console.ReadLine();  
8. }  

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();}