WebForm
前台
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
<asp:Label ID="Label1" runat="server" Text="Label">返回值</asp:Label>
后台
protected void Button1_Click(object sender, EventArgs e)
{
//1
//string url = "地址和参数";
//try
//{
// HttpWebRequest req = WebRequest.Create(url) as HttpWebRequest;
// req.ContentType = "application/x-www-form-urlencoded";
// req.Accept = "*/*";
// req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";
// req.Timeout = 10000;//10秒连接不成功就中断
// req.Method = "post";
// HttpWebResponse response = req.GetResponse() as HttpWebResponse;
// StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);
// this.Label1.Text = sr.ReadToEnd();
//}
//catch (WebException ex)
//{
// Console.WriteLine(ex.ToString());
//}
//Console.WriteLine(url); //2
string postData = "参数"; // 要发放的数据
string postUrl = "地址";
byte[] byteArray = Encoding.Default.GetBytes(postData); //转化
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
webReq.Method = "POST";
webReq.ContentType = "application/x-www-form-urlencoded";
webReq.ContentLength = byteArray.Length;
Stream newStream = webReq.GetRequestStream();
newStream.Write(byteArray, , byteArray.Length);//写入参数
newStream.Close();
HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);
this.Label1.Text = sr.ReadToEnd();
sr.Close();
response.Close();
newStream.Close(); //3
//byte[] postData = Encoding.UTF8.GetBytes("参数");//这里即为传递的参数，可以用工具抓包分析，也可以自己分析，主要是form里面每一个name都要加进来 编码
//string url = "地址";//地址
//WebClient webClient = new WebClient();
//webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//采取POST方式必须加的header，如果改为GET方式的话就去掉这句话即可
//byte[] responseData = webClient.UploadData(url, "POST", postData);//得到返回字符流
//string srcString = Encoding.UTF8.GetString(responseData);//解码
//this.Label1.Text = srcString; //4
//string postData = "参数"; // 要发放的数据
//string postUrl = "地址";
//HttpWebRequest request = (HttpWebRequest)WebRequest.Create(postUrl);
//request.Method = "POST";
//request.ContentType = "application/x-www-form-urlencoded";
//request.ContentLength = Encoding.UTF8.GetByteCount(postData);
////request.CookieContainer = cookie;//获取记录（储存在用户本地终端上的数据）
//Stream myRequestStream = request.GetRequestStream();
//StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
//myStreamWriter.Write(postData);
//myStreamWriter.Close();
//HttpWebResponse response = (HttpWebResponse)request.GetResponse();
////response.Cookies = cookie.GetCookies(response.ResponseUri);//获取记录（储存在用户本地终端上的数据）
//Stream myResponseStream = response.GetResponseStream();
//StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
//string retString = myStreamReader.ReadToEnd();
//this.Label1.Text = retString;
//myStreamReader.Close();
//myResponseStream.Close();
}
这些都是到处总结出来的