如何在C#中发送http请求给Web服务器？

[Artist]

就像在IE输入url一样。
比如
ClassA.URL="http://www.csdn.net";

ClassA.Connect();

[yarshray]

HttpWebRequest

参考:

http://www.digitalearth.net.cn/gisrelateditissues/asp.net/net2internet.htm

[dtmyou]

借花献佛
using System.Net;


WebRequest req = WebRequest.Create( "http://www.aaa.com/bbb.aspx" );
req.Method = "POST"; //指定提交的Method，可以为POST和GET，一定要大写

byte[] postData = System.Text.Encoding.GetEncoding("gb2312").GetBytes( "?param1=aaa¶m2=bbb" );//Post的数据

req.ContentLength = postData.Length;
Stream postStream = req.GetRequestStream();
postStream.Write(postData, 0, postData.Length);
postStream.Close();

WebResponse res = req.GetResponse();

System.Text.Encoding resEncoding = System.Text.Encoding.GetEncoding("gb2312");//接收的编码
StreamReader reader = new StreamReader( res.GetResponseStream(),resEncoding );

string html = reader.ReadToEnd(); //接收的Html

reader.Close();
res.Close();