private void mThongKeDoanhSo_Click(object sender, EventArgs e) { lblTieuDe.Text = "Thống kê doanh số"; Cursor.Current = Cursors.WaitCursor; XuLyChuyenForm(); FrmThongKeDoanhSo m_FrmThongKeDoanhThu = FrmThongKeDoanhSo.Instance; f = m_FrmThongKeDoanhThu; m_FrmThongKeDoanhThu.MdiParent = this; m_FrmThongKeDoanhThu.Dock = DockStyle.Fill; m_FrmThongKeDoanhThu.Show(); }
private void FrmThongKeDoanhThu_FormClosed(object sender, FormClosedEventArgs e) { _Instance = null; }