C# winform 请求http的实现(get,post)

string strURL = "http://localhost/WinformSubmit.php?tel=11111&name=张三";
System.Net.HttpWebRequest request;
// 创建一个HTTP请求
request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);
//request.Method="get";
System.Net.HttpWebResponse response;
response = (System.Net.HttpWebResponse)request.GetResponse();
System.IO.StreamReader myreader = new System.IO.StreamReader(response.GetResponseStream(), Encoding.UTF8);
string responseText = myreader.ReadToEnd();
myreader.Close();
MessageBox.Show(responseText);

string strURL = "http://localhost/WinformSubmit.php";
System.Net.HttpWebRequest request;
request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);
//Post请求方式
request.Method = "POST";
// 内容类型
request.ContentType = "application/x-www-form-urlencoded";
// 参数经过URL编码
string paraUrlCoded = System.Web.HttpUtility.UrlEncode("keyword");
paraUrlCoded += "=" + System.Web.HttpUtility.UrlEncode("多月");
byte[] payload;
//将URL编码后的字符串转化为字节
payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
//设置请求的 ContentLength 
request.ContentLength = payload.Length;
//获得请 求流
System.IO.Stream writer = request.GetRequestStream();
//将请求参数写入流
writer.Write(payload, 0, payload.Length);
// 关闭请求流
writer.Close();
System.Net.HttpWebResponse response;
// 获得响应流
response = (System.Net.HttpWebResponse)request.GetResponse();
System.IO.StreamReader myreader = new System.IO.StreamReader(response.GetResponseStream(), Encoding.UTF8);
string responseText = myreader.ReadToEnd();
myreader.Close();
MessageBox.Show(responseText);

 //请求
string uri = http://www.baidu.com;
HttpWebRequest request = HttpWebRequest.Create(uri) as HttpWebRequest;
request.Method = "GET";                            //请求方法
request.ProtocolVersion = new Version(1, 1);   //Http/1.1版本
//Add Other ...

HttpWebResponse response=request.GetResponse() as HttpWebResponse;
   //Header
   foreach (var item in response.Headers)   
  {
     this.txt_Header.Text += item.ToString()+": " +   
     response.GetResponseHeader  (item.ToString())
     + System.Environment.NewLine;
  }
 
    //如果主体信息不为空，则接收主体信息内容
   if (response.ContentLength <= 0)
      return;
   //接收响应主体信息
   using(Stream stream =response.GetResponseStream())
   {
     int totalLength=(int)response.ContentLength;
     int numBytesRead=0;
     byte[] bytes=new byte[totalLength+1024];
    //通过一个循环读取流中的数据，读取完毕，跳出循环
     while( numBytesRead < totalLength  )
     {
      int num=stream.Read(bytes,numBytesRead,1024);  //每次希望读取1024字节
      if( num==0 )   //说明流中数据读取完毕
        break;
      numBytesRead+=num;
     }
 
　 }
   //将接收到的主体数据显示到界面
   string content=Encoding.UTF8.GetString(bytes);
   this.txt_Content.Text=content;