C# (CSharp) StoreManagementProject NewSale示例

示例#1

 private void btnSale_Click(object sender, EventArgs e)
 {
     if (ns == null)
     {
         ns             = new NewSale(label4.Text);
         ns.MdiParent   = this;
         ns.FormClosed += new FormClosedEventHandler(ns_FormClosed);
         ns.Show();
     }
     else
     {
         ns.Activate();
     }
 }

示例#2

 void ns_FormClosed(object sender, FormClosedEventArgs e)
 {
     ns = null;
 }