调用新窗口时如何关闭打开的窗口?这意味着我当时只想要 1 个子窗口。我不允许多窗口。
public partial class Main_Usr : Form
{
public Main_Usr()
{
InitializeComponent();
this.IsMdiContainer = true;
if (Program.IsFA) barSubItem_Ordre.Visibility = DevExpress.XtraBars.BarItemVisibility.Never;
Ordre_Liste f = new Ordre_Liste();
f.MdiParent = this;
f.Show();
}
private void barButtonItem_CreateOrdre_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
Program.AllerRetour = "Ordre Aller";
Ordre_Fiche f = new Ordre_Fiche();
f.MdiParent = this;
f.Show();
}
private void barButtonItem_OrdreListe_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
Ordre_Liste f = new Ordre_Liste();
f.MdiParent = this;
f.Show();
}
private void barButtonItem_CreateOrdRet_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
Program.AllerRetour = "Ordre Retour";
Ordre_Fiche f = new Ordre_Fiche();
f.MdiParent = this;
f.Show();
}
}