private void btnDSCahoc_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { var form = new frmCaHoc(); if (ExistForm(form)) return; form.MdiParent = this; form.Show(); }
/* private Form KiemTraTonTai(Type fType) * { * foreach(Form f in this.MdiChildren) * { * if (f.GetType() == fType) * { * return f; * } * } * return null; * }*/ private void btnDSCahoc_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { /* Form frm = this.KiemTraTonTai(typeof(frmCaHoc)); * if (frm != null) * { * frm.Activate(); * } * else * { * frmCaHoc f = new frmCaHoc(); * f.MdiParent = this; * f.Show(); * }*/ var form = new frmCaHoc(); if (ExistForm(form)) { return; } form.MdiParent = this; form.Show(); }