如何在没有js的情况下获取价值点击gridview？

Question

以下代码给我以下错误：如何生成此代码请帮助我！！！

索引超出范围。必须是非负数且小于集合的大小。 参数名称：索引

  protected void gvDepartman_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                string selectedid = (gvDepartman).DataKeys[e.Row.RowIndex].Value.ToString();
                e.Row.Attributes["onclick"] = "location.href='Test.aspx?id=" + selectedid + "'";
            }
        }

Answer 1

  protected void gvDepartman_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow && e.Row.RowIndex >=0)
        {
            string selectedid = (gvDepartman).DataKeys[e.Row.RowIndex].Value.ToString();
            e.Row.Attributes["onclick"] = string.Format("location.href='Test.aspx?id={0}'", selectedid);
        }
    }