RowCommand不适用于所有行

Question

如果我在GridView ButtonField中使用自己的CommandName向FormView显示某些行的详细信息，并且当我单击第一行时显示它，而对于其他行则显示它不起作用，这是什么原因？我还有其他按钮字段和命令名的列，它们对每一行都能正常工作....

 protected void gvQuizes_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "cnOptions")
        {
            int index = Convert.ToInt32(e.CommandArgument);
            GridViewRow row = gvTestyW.Rows[index];
            if (row != null)
            {
                LinkButton lbtn = row.Cells[5].Controls[0] as LinkButton;
                string quizID = gvTestyW.DataKeys[row.RowIndex].Value.ToString();
                if (lbtn.Text == "Show")
                {
                    lbtn.Text = "Hide";
                    fvOptions.Visible = true;
                    sdsOpcje.SelectCommand = "HERE IS SQL QUERY THAT ENDS WITH: WHERE quizes.Id=" + quizID;
                }
                else if (lbtn.Text == "Hide")
                {
                    lbtn.Text = "Show";
                    fvOptions.Visible = false;
                }
            }