using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.IO;
using Microsoft.Data.Sqlite;
using System.Data.Common;
using System.Windows.Media.Animation;
using System.Data.SQLite;

namespace DyeingComputer.UserClass
{
    internal class SqliteHelper
    {

        /// <summary>
        /// 事务的基类
        /// </summary>
        private DbTransaction DBtrans;

        /// <summary>
        /// 数据库地址
        /// </summary>
        private readonly string dbFile = "Data Source=" + Environment.CurrentDirectory + "\\DataBase\\COMPUTER.db;Version3";
        /// <summary>
        /// 数据库密码
        /// </summary>
        private readonly string mPassWord;
        private readonly string LockName = null;
        /// <summary>  
        /// 打开一个SQLite数据库文件，如果文件不存在，则创建（无密码）
        /// </summary>  
        /// <param name="dataFile"></param>  
        /// <returns>SQLiteConnection 类</returns>  
        private SQLiteConnection OpenConnection(string dataFile)
        {
            if (dataFile == null)
            {
                throw new ArgumentNullException("dataFiledataFile=null");
            }
            if (!File.Exists(dataFile))
            {
                SQLiteConnection.CreateFile(dataFile);
            }
            SQLiteConnection conn = new SQLiteConnection();
            SQLiteConnectionStringBuilder conStr = new SQLiteConnectionStringBuilder
            {
                DataSource = dataFile
            };
            conn.ConnectionString = conStr.ToString();
            conn.Open();
            return conn;
        }

        public void qe()
        { }
        public void SqliteHe() 
        { OpenConnection(dbFile); }
    }
}