Anan

public static string Post(string uri, string postString)
{
    string responseString;

    var request = (HttpWebRequest)WebRequest.Create(uri);
    request.Timeout = 600000;

    // 设置POST数据
    var postByte = Encoding.UTF8.GetBytes(postString);
    request.Method = "POST";
    request.ContentType = "application/x-www-form-urlencoded";
    request.ContentLength = postByte.Length;
    using (var stream = request.GetRequestStream())
        stream.Write(postByte, 0, postByte.Length);

    // 发送POST
    using (var response = (HttpWebResponse)request.GetResponse())
    using (var stream = response.GetResponseStream())
    {
        if (stream == null)
            throw new Exception("stream = null");
        if (response.CharacterSet == null)
            throw new Exception("response.CharacterSet = null");
        using (var sr = new StreamReader(stream, Encoding.GetEncoding(response.CharacterSet)))
            responseString = sr.ReadToEnd();
    }

    return responseString;

}//Post

public static string Get(string uri)
{
    string responseString;

    var request = (HttpWebRequest)WebRequest.Create(uri);
    request.Timeout = 600000;

    using (var response = (HttpWebResponse)request.GetResponse())
    using (var stream = response.GetResponseStream())
    {
        if (stream == null)
            throw new Exception("stream = null");
        if (response.CharacterSet == null)
            throw new Exception("response.CharacterSet = null");
        using (var sr = new StreamReader(stream, Encoding.GetEncoding(response.CharacterSet)))
            responseString = sr.ReadToEnd();
    }

    return responseString;
}//Get