DATAGRID
foreach (DataGridItem item in VoteList.Items)
{
      CheckBox check = (CheckBox)item.FindControl("VoteCheck");
      if (check != null)
      {
    if (check.Checked == true)
    {
    vote.UpdateVote(Int32.Parse(VoteList.DataKeys[item.ItemIndex].ToString())); 
                                }
      }
}
怎么转GRIDVIEW?下面我是这样写的
        foreach (GridViewRow g in GridView1.Rows)
        {
            CheckBox check = (CheckBox)g.FindControl("VoteCheck");
            if (check != null)
            {
                if (check.Checked)
                {
                    SQLHelper helper = new SQLHelper();
                    VoteItems v = new VoteItems();
                    v.Update(helper.mycon,Int32.Parse(GridView1.DataKeys[g.RowIndex].ToString()));/*这句话抱错,索引超出范围。必须为非负值并小于集合大小。参数名: index 报这个错*/

                }
            }
        }