【C#】.net 发送get/post请求

基础学习

/// <summary>
/// Http (GET/POST)
/// </summary>
/// <param name="url">请求URL</param>
/// <param name="parameters">请求参数</param>
/// <param name="method">请求方法</param>
/// <returns>响应内容</returns>
static string sendPost(string url, IDictionary<string, string> parameters, string method)
{
    if (method.ToLower() == "post")
    {
        HttpWebRequest req = null;
        HttpWebResponse rsp = null;
        System.IO.Stream reqStream = null;
        try
        {
            req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = method;
            req.KeepAlive = false;
            req.ProtocolVersion = HttpVersion.Version10;
            req.Timeout = 5000;
            req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
            byte[] postData = Encoding.UTF8.GetBytes(BuildQuery(parameters, "utf8"));
            reqStream = req.GetRequestStream();
            reqStream.Write(postData, 0, postData.Length);
            rsp = (HttpWebResponse)req.GetResponse();
            Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
            return GetResponseAsString(rsp, encoding);
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
        finally
        {
            if (reqStream != null) reqStream.Close();
            if (rsp != null) rsp.Close();
        }
    }
    else
    {
        //创建请求
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "?" + BuildQuery(parameters, "utf8"));

        //GET请求
        request.Method = "GET";
        request.ReadWriteTimeout = 5000;
        request.ContentType = "text/html;charset=UTF-8";
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        Stream myResponseStream = response.GetResponseStream();
        StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));

        //返回内容
        string retString = myStreamReader.ReadToEnd();
        return retString;
    }
}

方法代码