C#笔记（3）获取json数据并解析

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最新推荐文章于 2024-05-05 16:31:47 发布

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分类专栏： c#

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这篇笔记详细介绍了如何使用C#进行网络请求，创建HttpUtils类来获取JSON数据，设计Bean类存储解析后的数据，并通过指定URL获取及解析JSON内容。

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1.创一个HttpUitls类，接受网络数据

public class HttpUitls
    {
        public static string Get(string Url)
        {
            //System.GC.Collect();
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            request.Proxy = null;
            request.KeepAlive = false;
            request.Method = "GET";
            request.ContentType = "application/json; charset=UTF-8";
            request.AutomaticDecompression = DecompressionMethods.GZip;

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
            string retString = myStreamReader.ReadToEnd();

            myStreamReader.Close();
            myResponseStream.Close();

            if (response != null)
            {
                response.Close();
            }
            if (request != null)
            {
                request.Abort();
            }

            return retString;
        }

        public static string Post(string Url)
        {
            string Data = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            request.Method = "POST";
            request.Referer = "";
            byte[] bytes = Encoding.UTF8.GetBytes(Data);
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = bytes.Length;
            try
            {
                Stream myResponseStream = request.GetRequestStream();
                myResponseStream.Write(bytes, 0, bytes.Length);
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                StreamReader myStreamReader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                string retString = myStreamReader.ReadToEnd();
                myStreamReader.Close();
                myResponseStream.Close();

                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }
                return retString;
            }
            catch
            {
                MessageBox.Show("无法连接到远程服务器");
                return "";
            }
        }

        internal static string Post(object p, string v)
        {
            throw new NotImplementedException();
        }
    }

2.创一个Bean类，放解析后的数据。

class LoginBean
{
    public String retCode { get; set; }//返回结果：成功0001，失败0000
    public String errCode { get; set; }//错误编码，见 附录（未定），返回结果为0000时不可空
    public String errMsg { get; set; }//错误描述信息，返回结果为0000时不可空
    public Data_LoginBean data { get; set; }
    public class Data_LoginBean
    {
        public int organzier_id { get; set; }
        public int flag { get; set; }
    }
}

3.获得获取数据的网址

string web = Url.URL + Url.login + "userName=" + textBox_username.Text + "&password=" + Md5.getMd5(textBox_password.Text) + "&flag=" + identity;//拼一个网址

4.获取json数据

string json = HttpUitls.Post(web);

5.解析json数据

if (json != "")
{
    LoginBean loginBean = (LoginBean)JsonConvert.DeserializeObject(json, typeof(LoginBean));
    //
    //具体用数据
    //
}