getpost请求

// 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;
}

/// 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;
}

调用
string url = "http://www.mystudy.cn/LoginHandler.aspx";
string data = "UserName=admin&Password=123";
string result = HttpPost(url, data);
Console.WriteLine(result);