private void kháchHàngToolStripMenuItem_Click(object sender, EventArgs e)
{
panelPreference.Controls.Clear();
panelContents.Controls.Clear();
mcADDBanhang = mcADDBanhang ?? new MCADDKhachhang();
pmCustonmer = pmCustonmer ?? new PMCustomer();
panelPreference.Controls.Add(pmCustonmer);
panelContents.Controls.Add(mcADDBanhang);
}
private void btnCustomer_Click(object sender, EventArgs e)
{
mcADDBanhang = new MCADDKhachhang();
frmLayout.panelContents.Controls.Clear();
frmLayout.panelContents.Controls.Add(mcADDBanhang);
}