public FORM_RETURN_MANAGEMENT() { InitializeComponent(); if (frm == null) /*بعين قيمة لل form لو قيمتة ب null وهى تكون قيمتها الحالية */ // .......[4] { frm = this; } DGV_RETURN_MANGE.DataSource = return_order.GET_RETURN_ORDER(); btn_delete.Enabled = false; btn_edit.Enabled = false; btn_return_product.Enabled = false; }
private static FORM_RETURN_MANAGEMENT frm; // ......................[1] static void frm_formclosed(object sender, FormClosedEventArgs e) // ................[2] { frm = null; }
private void returnBillManagementToolStripMenuItem_Click(object sender, EventArgs e) { FORM_RETURN_MANAGEMENT frm = new FORM_RETURN_MANAGEMENT(); frm.ShowDialog(); }