在GridView中动态添加模板列DropDownList,找不到该DropDownList

Question

DropDownList dr = (DropDownList)gvr.FindControl("dropdown" + lt.Value.ToString());}
的client名称与你所指定的名称不同。dropdown" + lt.Value.ToString()

Answer 1

用这种方式来查找(DropDownList)gvr.SelcetRow.cell.Control[0].....

Answer 2

protected void gdvMain_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (((DropDownList)e.Row.FindControl("drpName")) != null)
            {
                DropDownList drpName = ((DropDownList)e.Row.FindControl("drpName"));
                drpName.DataSource = GetDataFromXML("names");
                drpName.DataBind();
            }
        }

Answer 3

把添加控件的代码写在 Page_Load  事件里面。而且不能写在 IsPostBack 里面

Answer 4

(DropDownList)gvr.SelcetRow.cell.Control[0].....在那个gvr中根本没有SelcetRow

Answer 5

把添加控件的代码写在 Page_Load  事件里面 ,显示出来的GridView有多列空的.
自动添加<td>&nbsp;</td><td>&nbsp;</td> 这样的列.