提交服务器 post get

// method --- WebRequestMethods.Http.Post 或 WebRequestMethods.Http.Get

private string HttpRequestGet(string url, string method, string data)
{
   var request = WebRequest.Create(url);
   request.Method = method;

   if (method == WebRequestMethods.Http.Post)
   {
       byte[] buffer = Encoding.Default.GetBytes(data);
       request.ContentType = "application/x-www-form-urlencoded";
       request.ContentLength = buffer.Length;

       Stream streamRequest = request.GetRequestStream();
       streamRequest.Write(buffer, 0, buffer.Length);
       streamRequest.Close();
   }

    var response = request.GetResponse();
    var streamResponse = response.GetResponseStream();
    if (streamResponse == null)
　　{
　　　　 return "";
　　}
    StreamReader reader = new StreamReader(streamResponse, Encoding.Default);
    string result = reader.ReadToEnd();

    streamResponse.Close();
    reader.Close();
    return result;
}

public string WebClientGet(string url)
{
    WebClient client = new WebClient();
    client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
    Stream stream = client.OpenRead(url);
    if (stream == null)
　　{
　　　　return "";
　　}
    StreamReader reader = new StreamReader(stream, Encoding.Default);
    string result = reader.ReadToEnd();
    stream.Close();
    reader.Close();
    return result;
}

public string GetStr(string data)
{
　　string url = "";
　　byte[] postData = Encoding.UTF8.GetBytes(data);
　　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 getStr = Encoding.UTF8.GetString(responseData);//解码
　　return getStr;
}