private void productToolStripMenuItem_Click(object sender, EventArgs e)
 {
     frmProduct frm = new frmProduct();
     frm.Show();
 }
 private void updateToolStripMenuItem_Click(object sender, EventArgs e)
 {
     Product selectProduct = GetSelectedCategory();
     frmProduct frmProduct=new frmProduct(selectProduct);
     frmProduct.ShowDialog();
     GetData();
     resultListView.HideSelection = false;
 }