在LinkButton控件中缺少OnClick

我试图从Linkbutton我点击的ProductID，但我找不到一个OnClick的选择，只是OnClientClick，但它不工作，有另一种方法吗?

protected void Page_Load(object sender, EventArgs e)
{
    DataTable table = CategoryAccess.GetAllProducts();
    for (int i = 0; i < table.Rows.Count; i++)
    {
        LinkButton lbDelete = new LinkButton();
        lbDelete.Text = table.Rows[i]["ProductName"].ToString();
        lbDelete.ID = table.Rows[i]["ProductID"].ToString();
        lbDelete.CommandArgument = table.Rows[i]["ProductID"].ToString();
        lbDelete.OnClientClick = "btnDelete_Click";

        phDelete.Controls.Add(lbDelete);
     }
 }
    protected void btnDelete_Click(object sender, EventArgs e)
    {
        LinkButton _sender = (LinkButton)sender;
        string TrixID = _sender.CommandArgument;
        DeleteProduct(ProductID);
    }