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C#使用GET、POST请求获取结果

2019年07月18日  | 移动技术网IT编程  | 我要评论

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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