private void btnTEST2_Click(object sender, EventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();

            dlg.Filter      = "SQLite File (*.db)|*.db|All Files (*.*)|*.*";
            dlg.Multiselect = true; //Chỗ này nè

            if (dlg.ShowDialog(this) == DialogResult.OK)
            {
                foreach (string str in dlg.FileNames)
                {
                    _FileNames.Add(str);
                }
                foreach (string str in dlg.SafeFileNames)
                {
                    _SafeFileNames.Add(str);
                }
            }

            //themVaoCSDLxml123_test();


            using (frmWaitForm frm = new frmWaitForm(themVaoCSDLxml123_3))
            {
                frm.ShowDialog(this);
                MessageBox.Show("Thêm Dữ Liệu Thành Công");
            }

            /*
             * using (frmWaitForm frm = new frmWaitForm(themVaoBangxml123))
             * {
             *
             *  frm.ShowDialog(this);
             * }*/
        }
 private void btnSplit_Click(object sender, EventArgs e)
 {
     using (frmWaitForm frm = new frmWaitForm(tachDuLieu))
     {
         frm.ShowDialog(this);
         MessageBox.Show("Đã xử lý xong dữ liệu");
     }
 }
 private void btnShowHide_Click(object sender, EventArgs e)
 {
     using (frmWaitForm frm = new frmWaitForm(hienThiDuLieu))
     {
         frm.ShowDialog(this);
         this.gridControlMain.DataSource = this.dtMain;
         this.lbFileMain.Text            = "Dòng Dữ Liệu: " + this.dtMain.Rows.Count.ToString();
         MessageBox.Show("Tải xong dữ liệu: " + this.dtMain.Rows.Count.ToString() + " Dòng");
     }
 }
        private void btlLoadFileMain_Click(object sender, EventArgs e)
        {
            this.gridControlMain.DataSource = null;
            OpenFileDialog dlg = new OpenFileDialog();

            dlg.Filter = "SQLite File (*.db)|*.db|All Files (*.*)|*.*";

            if (dlg.ShowDialog(this) == DialogResult.OK)
            {
                _fileNameMain_Old = dlg.FileName;
                string temp = _fileNameMain_Old;
                _fileNameMain_New    = temp.Split('.')[0].ToString() + "_splited.db";
                this.tbFileMain.Text = _fileNameMain_New;
                using (frmWaitForm frm = new frmWaitForm(saoChepDuLieu))
                {
                    frm.ShowDialog(this);
                    MessageBox.Show("Đã tải xong dữ liệu");
                }
            }
        }