private void btn_LoaiSach_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { frmLoaiSach f = new frmLoaiSach(); if (ExistForm(f)) { return; } f.MdiParent = this; f.Show(); }
private void LoaiSachTool_Click(object sender, EventArgs e) { frmLoaiSach f = new frmLoaiSach(); f.ShowDialog(); }