asp.net中gridview隐藏一列并且使用这列数据的方法

1     protected void grdView_RowCreated(object sender, GridViewRowEventArgs e)
2     {
3         if (e.Row.RowType == DataControlRowType.DataRow || e.Row.RowType == DataControlRowType.Header)
4         {
5             e.Row.Cells[1].Visible = false;
6         }
7     }

 1 protected void Page_Load(object sender, EventArgs e){
 2     if (!this.IsPostBack){
 3     　　this.grdView.DataKeyNames = new string[] { "FLD_ID" };
 4     }
 5 }    
 6 
 7 protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e){
 8  　 int index = Convert.ToInt32(e.CommandArgument); //行索引
 9     string strUser = this.grdView.DataKeys[index]["FLD_ID"].ToString(); }