public Form1()
        {
            InitializeComponent();
            databaseInit();
            String url = "https://api.steampowered.com/IEconDOTA2_570/GetHeroes/v0001/?key=<key>&language=zh_cn";
            WebClient web = new WebClient();
            web.Encoding = System.Text.Encoding.UTF8;
            String html = web.DownloadString(url);
            load(html);
        }

        private void load(String json)
        {
            JObject jo = JObject.Parse(JObject.Parse(json)["result"].ToString());
            JArray ja = JArray.Parse(jo["heroes"].ToString());
            for (int i = 0; i < ja.Count; i++)
            {
                String name = ja[i]["name"].ToString();
                String id = ja[i]["id"].ToString();
                String local = ja[i]["localized_name"].ToString();

                String sql = "INSERT INTO heroes(id,name,localized_name)VALUES(" + id + ",‘" + name
                    + "‘,‘" + local + "‘)";
                cmdInit(sql).ExecuteNonQuery();
            }
        }

        //数据库初始化
        public void databaseInit()
        {
            //数据库文件地址
            String datasource = System.Windows.Forms.Application.StartupPath  + "\\dota.db";
            //连接数据
            conString.DataSource = datasource;
            //可添加设置密码 constr.Password="";
            sqlCon.ConnectionString = conString.ToString();
            //创建数据库文件并连接
            sqlCon.Open();
            //创建表
            try
            {
                String friendsql = "CREATE TABLE heroes (id integer PRIMARY KEY AUTOINCREMENT not null,name VARCHAR(64) not null," +
                            " localized_name VARCHAR(64));";
                cmdInit(friendsql).ExecuteNonQuery();
            }
            catch (Exception)
            {
            }
        }
        //SQLiteCommand初始化配置
        private SQLiteCommand cmdInit(String sql)
        {
            SQLiteCommand sqlCmd = new SQLiteCommand();
            sqlCmd.Connection = sqlCon;
            sqlCmd.CommandText = sql;
            return sqlCmd;
        }