找不到GirdView模版列中的控件。怎么办



<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" DataKeyNames="Student_id" DataSourceID="SqlDataSourceStu" ForeColor="#333333" GridLines="None" OnRowEditing="GridView1_RowEditing">

                <AlternatingRowStyle BackColor="White" />

                <Columns>

                    <asp:TemplateField HeaderText="出生日期" SortExpression="Student_BornDate">

                        <EditItemTemplate>

                            <asp:DropDownList ID="ddlAlterYear" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddlAlterYear_SelectedIndexChanged">

                            </asp:DropDownList>

                            <asp:DropDownList ID="ddlAlterMonth" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddlAlterMonth_SelectedIndexChanged">

                            </asp:DropDownList>

                            <asp:DropDownList ID="ddlAlterDay" runat="server" AutoPostBack="True">

                            </asp:DropDownList>

                        </EditItemTemplate>

                        <ItemTemplate>

                            <asp:Label ID="Label1" runat="server" Text='<%# ((DateTime)Eval("Student_BornDate")).ToString("yyyy-MM-dd") %>'></asp:Label>

                        </ItemTemplate>

                        <ControlStyle Width="100px" />

                    </asp:TemplateField>

                </Columns>

            </asp:GridView>



    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

    {

        DropDownList ddl = (DropDownList)GridView1.FindControl("ddlAlterYear");//为什么ddl得到的是一个null?如何才能得到里面的控件值呢？包括ItemTemplate，EditItemTemplate里面的

    }

gridview dropdownlist --------------------编程问答-------------------- gridview.Rows[i].Cells[i].FindControl --------------------编程问答--------------------     protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        DropDownList ddl = (DropDownList)e.Item.FindControl("ddlAlterYear")
    } --------------------编程问答-------------------- 如果没有e.Item，那么就是

    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        DropDownList ddl = (DropDownList)GridView1.Rows[e.NewEditIndex].FindControl("ddlAlterYear")
    } --------------------编程问答--------------------

引用 1 楼 bdmh 的回复:

gridview.Rows[i].Cells[i].FindControl

不行我试过了，只能找到Label，编辑状态的控件找不到 --------------------编程问答--------------------

引用 3 楼 sp1234 的回复:

如果没有e.Item，那么就是

    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        DropDownList ddl = (DropDownList)GridView1.Rows[e.NewEditIndex].FindControl("ddlAlterYear")
    }

不行，都是null.............
我是想获取控件后用代码添加相关数据，所以用了这么个方法 --------------------编程问答-------------------- 这个问题我还没有找到方法解决,还在寻找中

补充：.NET技术 ,  ASP.NET