string dataDir = AppDomain.CurrentDomain.BaseDirectory;
            if (dataDir.EndsWith(@"\bin\Debug\")
            || dataDir.EndsWith(@"\bin\Release\"))
            {
                dataDir = System.IO.Directory.GetParent(dataDir).Parent.Parent.FullName;
                AppDomain.CurrentDomain.SetData("DateDirectory", dataDir);
            }


            using (SqlConnection conn = new SqlConnection(@"Data Source=.\SQLEXPRESS;
AttachDBFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True"))
            {
                conn.Open();
                Console.WriteLine("打开数据库成功");
                Console.ReadKey();
                
            }