c# POST和GET方式通过server地址提交数据

1：POST方式提交：

<strong><span style="font-size:14px;">private static string HttpPostConnectToServer(string serverUrl, string postData)
        {
            var dataArray = Encoding.UTF8.GetBytes(postData);
            //创建请求
            var request = (HttpWebRequest)HttpWebRequest.Create(serverUrl);
            request.Method = "POST";
            request.ContentLength = dataArray.Length;
            //设置上传服务的数据格式
            request.ContentType = "application/x-www-form-urlencoded";
            //请求的身份验证信息为默认
            request.Credentials = CredentialCache.DefaultCredentials;
            //请求超时时间
            request.Timeout = 10000;
            //创建输入流
            Stream dataStream;
            //using (var dataStream = request.GetRequestStream())
            //{
            //    dataStream.Write(dataArray, 0, dataArray.Length);
            //    dataStream.Close();
            //}
            try
            {
                dataStream = request.GetRequestStream();
            }
            catch (Exception)
            {
                return null;//连接服务器失败
            }
            //发送请求
            dataStream.Write(dataArray, 0, dataArray.Length);
            dataStream.Close();
            //读取返回消息
            string res;
            try
            {
                var response = (HttpWebResponse)request.GetResponse();
                var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                res = reader.ReadToEnd();
                reader.Close();
            }
            catch (Exception ex)
            {
                var result = new ServerResult();
                return "{\"error\":\"connectToServer\",\"error_description\":\"" + ex.Message + "\"}";//连接服务器失败
            }
            return res;
        }</span></strong>

2：GET方式提交：

<strong><span style="font-size:14px;">private static string HttpGetConnectToServer(string serverUrl, string postData)
        {
            //创建请求
            var request = (HttpWebRequest)HttpWebRequest.Create(serverUrl + "?" + postData);
            request.Method = "GET";
            //设置上传服务的数据格式
            request.ContentType = "application/x-www-form-urlencoded";
            //请求的身份验证信息为默认
            request.Credentials = CredentialCache.DefaultCredentials;
            //请求超时时间
            request.Timeout = 10000;
            //读取返回消息
            string res;
            try
            {
                var response = (HttpWebResponse)request.GetResponse();
                var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                res = reader.ReadToEnd();
                reader.Close();
            }
            catch (Exception ex)
            {
                var result = new ServerResult();
                return "{\"error\":\"connectToServer\",\"error_description\":\"" + ex.Message + "\"}";
            }
            return res;
        }</span></strong>

3：调用方法：

<strong><span style="font-size:14px;">//服务地址
    var serverUrl ="https://openapi.baidu.com/rest/2.0/devapi/v1/lightapp/query/isonline";
 //上传的数据
    var postData = string.Format("access_token={0}&offline_app_id={1}", token, appId);</span></strong>