nuget获取Newtonsoft.Json
github地址：Newtonsoft.Json

        public static void Test1()
        {
            /* 文本格式如下 代码实现目的：
             1、VR 对象中是否包含ProjectId
             2、取ProjectId下的值
             {
                   "VR": {
                       "ProjectId": {
                           "txt_s": "工程项目的名称编号Id",
                           "value": "01"

                       },
                       "ProjectObject": {
                           "ProjectTypeName": {
                               "name": "12企业类别1",
                               "txt_s": "企业类别名称"

                           },
                           "txt_s": "企业类别对象"

                       },
                       "ProjectTitle": {
                           "txt_s": "工程项目的名称(Title信息)",
                           "value": "01"

                       },
                       "UserId": {
                           "txt_s": "用户的Id",
                           "value": "01"

                       }
                   }
               }
               */
            var str = @"%7b+%22VR%22%3a+%7b%22ProjectId%22%3a+%7b%22txt_s%22%3a+%22%e5%b7%a5%e7%a8%8b%e9%a1%b9%e7%9b%ae%e7%9a%84%e5%90%8d%e7%a7%b0%e7%bc%96%e5%8f%b7Id%22%2c+%22value%22%3a+%2201%22+%7d%2c+%22ProjectObject%22%3a+%7b%22ProjectTypeName%22%3a+%7b%22name%22%3a+%2212%e4%bc%81%e4%b8%9a%e7%b1%bb%e5%88%ab1%22%2c+%22txt_s%22%3a+%22%e4%bc%81%e4%b8%9a%e7%b1%bb%e5%88%ab%e5%90%8d%e7%a7%b0%22+%7d%2c+%22txt_s%22%3a+%22%e4%bc%81%e4%b8%9a%e7%b1%bb%e5%88%ab%e5%af%b9%e8%b1%a1%22+%7d%2c+%22ProjectTitle%22%3a+%7b%22txt_s%22%3a+%22%e5%b7%a5%e7%a8%8b%e9%a1%b9%e7%9b%ae%e7%9a%84%e5%90%8d%e7%a7%b0(Title%e4%bf%a1%e6%81%af)%22%2c+%22value%22%3a+%2201%22+%7d%2c+%22UserId%22%3a+%7b%22txt_s%22%3a+%22%e7%94%a8%e6%88%b7%e7%9a%84Id%22%2c+%22value%22%3a+%2201%22+%7d+%7d%7d";
            //上述文本是编码之后的，方便调试
            str = HttpUtility.UrlDecode(str, Encoding.UTF8);

            var jobject = JObject.Parse(str);

            var projectId = jobject.SelectToken("VR.ProjectId");

            //VR 对象中是否包含ProjectId
            if (!projectId.HasValues)
            {
                //不包含
            }
            else
            {
                foreach (var temp in projectId.Children())
                {
                    if (temp.Path.EndsWith("txt_s"))
                    {
                        var a = temp.ToObject<string>();
                        //a 的值是 工程项目的名称编号Id
                    }

                    if (temp.Path.EndsWith("value"))
                    {
                        var a = temp.ToObject<string>();
                        //a 的值是 01
                    }
                }
            }
        }

mysql循环插入数据、生成随机数及CONCAT函数

DELIMITER ;
CREATE PROCEDURE test_insert()
BEGIN
DECLARE y TINYINT DEFAULT 1;
WHILE y<13
DO

INSERT INTO app_sign(`user_id`, `score`, `createdate`)
VALUES ('1', FLOOR( 1 + RAND() * 5), CONCAT('2018-',CAST(y AS CHAR),'-07') );

SET y=y+1;
END WHILE ;
COMMIT;
END;
CALL test_insert();
DROP PROCEDURE IF EXISTS test_insert;

DELIMITER ;
CREATE PROCEDURE test_insert()
BEGIN
DECLARE y TINYINT DEFAULT 1;
REPEAT

INSERT INTO app_sign(`user_id`, `score`, `createdate`)
VALUES ('1', FLOOR( 1 + RAND() * 5), CONCAT('2018-',CAST(y AS CHAR),'-07') );

SET y=y+1; 

UNTIL y >= 12
END REPEAT;
COMMIT;
END;
CALL test_insert();
DROP PROCEDURE IF EXISTS test_insert;

DELIMITER ;
CREATE PROCEDURE test_insert()
BEGIN
DECLARE y TINYINT DEFAULT 1;
lp:LOOP
    INSERT INTO app_sign(`user_id`, `score`, `createdate`)
    VALUES ('1', FLOOR( 1 + RAND() * 5), CONCAT('2018-',CAST(y AS CHAR),'-07') );

    SET y=y+1; 

    IF y > 12 THEN
        LEAVE lp;
    END IF;

END LOOP;
COMMIT;
END;
CALL test_insert();
DROP PROCEDURE IF EXISTS test_insert;

在工作时，需要获取服务器公网IP（外网IP），并且判断该IP地址是属于网通还是电信。花时间整理一下，自己实现的代码，以及后续遇到的问题。

        /// <summary>
        /// 获取外网IP
        /// </summary>
        /// <returns>IP</returns>
        public static string GetOuterIP()
        {
            string IP = string.Empty;
            Uri uri = new Uri("http://www.ip138.com/ips138.asp");
            System.Net.HttpWebRequest req = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(uri);
            req.Method = "get";
            using (System.IO.Stream s = req.GetResponse().GetResponseStream())
            {
                using (System.IO.StreamReader reader = new System.IO.StreamReader(s))
                {
                    char[] ch = { '[', ']' };
                    string str = reader.ReadToEnd();
                    System.Text.RegularExpressions.Match m = System.Text.RegularExpressions.Regex.Match(str, @"\[(?<IP>[0-9\.]*)\]");
                    IP= m.Value.Trim(ch);

                }
            }
            return IP;
        }

        /// <summary>
        /// 判断ip是电信还是网通，网通为0，电信为1
        /// </summary>
        /// <returns></returns>
        public static string GetLocation()
        {
            string location = "0";
            try
            {
                Uri uri = new Uri("http://www.ip138.com/ips138.asp");
                System.Net.HttpWebRequest req = System.Net.WebRequest.Create(uri) as System.Net.HttpWebRequest;
                if (req != null)
                {
                    req.Method = "get";
                    using (System.IO.Stream s = req.GetResponse().GetResponseStream())
                    {
                        using (System.IO.StreamReader reader = new System.IO.StreamReader(s, Encoding.GetEncoding("gb2312")))
                        {
                            string str = reader.ReadToEnd();
                            if (str.Contains("电信"))
                            {
                                location = "1";
                            }
                        }
                    }
                }
            }
            catch
            {
                location = "0";
            }
            return location;
        }