分析代码 (未完成

ningshuxia

2024-04-28 cc3788df309c28a19f61331a5ec5379717799a9b

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using System.Data.SQLite;
 
namespace IStation.DAL
{
    public class DbInitial
    {
 
        private static string _dbName = "Db4Schedule.db";
        private static string _filePath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Data");
        public static string DbFilePath
        {
            get => _filePath + "\\" + _dbName;
        }
 
        /// <summary>
        /// 初始数据库
        /// </summary> 
        /// <param name="backup"></param>
        /// <param name="stringDefaultLength"></param>
        /// <returns></returns>
        public static bool InitTables(bool backup = false, int stringDefaultLength = 250)
        {
            var db = GetDb();
            if (db == null)
                return false;
 
            Type[] types = new Type[] {
                       typeof(Entity.ScheduleCombine),
                       typeof(Entity.ScheduleCombineLog),
                       typeof(Entity.ScheduleAnaLog),
 
                   };
 
            //Db.CodeFirst.SetStringDefaultLength(StringDefaultLength); 
            db.DbMaintenance.CreateDatabase();
            if (backup)
            {
                db.CodeFirst.BackupTable().InitTables(types);
            }
            else
            {
                db.CodeFirst.InitTables(types);
            }
            return true;
        }
 
        private static SqlSugarClient GetDb()
        {
            var filePath = DbFilePath;
            if (!System.IO.File.Exists(filePath))
            {
                try
                {
                    SQLiteConnection.CreateFile(filePath);
                }
                catch (Exception ex)
                {
                    var errMsg = $".db 文件不存在!Path:{filePath}\r\n{ex.Message}";
                    throw new Exception(errMsg);
                }
            }
 
            var config = new ConnectionConfig();
            config.ConnectionString = $"DataSource={filePath}";
            config.IsAutoCloseConnection = true;
            config.DbType = SqlSugar.DbType.Sqlite;
            config.ConfigureExternalServices = new ConfigureExternalServices()
            {
                EntityService = (property, column) =>
                {
                    //除主键外都可空
                    if (!column.IsPrimarykey)
                    {
                        column.IsNullable = true;
                    }
                }
            };
 
            var db = new SqlSugarClient(config);
            db.Aop.OnLogExecuting = (sql, pars) =>
            {
                Console.WriteLine(sql + "\r\n" + db.Utilities.SerializeObject
                    (pars.ToDictionary(it => it.ParameterName, it => it.Value)));
                Console.WriteLine();
            };
 
            return db;
        }
 
    }
 
}