private void btnKhachHang_ItemClick(object sender, ItemClickEventArgs e)
{
Form frm = this.KiemTraTonTai(typeof(PresentationLayers.frmKhachHang));
if (frm != null)
{
frm.Activate();
}
else
{
PresentationLayers.frmKhachHang f = new PresentationLayers.frmKhachHang();
f.MdiParent = this;
f.Show();
}
}
private void btnThemKhachHang_Click(object sender, EventArgs e)
{
frmKhachHang f = new frmKhachHang();
f.ShowDialog();
}