private void toolStripStatus_ThemMoi_Click(object sender, EventArgs e)
        {
            frmXuLy_HangTraLai xuly = new frmXuLy_HangTraLai("Them_TraLaiNhaCungCap", "TraLaiNhaCungCap", "Insert");

            xuly.ShowDialog();
            SelectData();
        }
        private void dgvHienThi_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            frmXuLy_HangTraLai xuly = new frmXuLy_HangTraLai("Sua_KhachHangTraLai", "KhachHangTraLai", "Update", getDatagridview());

            xuly.ShowDialog();
            SelectData();
        }
 private void toolStripStatus_ThemMoi_Click(object sender, EventArgs e)
 {
     for (int j = 0; j < 1000; j++)
     {
         if (frmXuLy_HangTraLai.trave == "")
         {
             frmXuLy_HangTraLai xuly = new frmXuLy_HangTraLai("Them_KhachHangTraLai", "KhachHangTraLai", "Insert");
             xuly.ShowDialog();
             SelectData();
         }
         else
         {
             frmXuLy_HangTraLai.trave = "";
             return;
         }
     }
 }
        private void toolStripStatus_Sua_Click(object sender, EventArgs e)
        {
            frmXuLy_HangTraLai xuly = new frmXuLy_HangTraLai("Sua_TraLaiNhaCungCap", "TraLaiNhaCungCap", "Update", getDatagridview());

            xuly.ShowDialog();
        }