asp.net 在GridView EditItemTemplate模版里获取控件

Question

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            Width="100%" CellPadding="4" ForeColor="#333333" GridLines="None" 
            onrowediting="GridView1_RowEditing" DataKeyNames="com_id" 
            onrowcommand="GridView1_RowCommand" 
            onrowdatabound="GridView1_RowDataBound" 
            onrowupdated="GridView1_RowUpdated" onrowcreated="GridView1_RowCreated">
            <RowStyle BackColor="#EFF3FB" />
          <Columns>
             <asp:TemplateField HeaderText="编号">
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text="Label"><%# Eval("com_num") %></asp:Label>
                    
                </ItemTemplate>
             </asp:TemplateField>
             <asp:TemplateField HeaderText="公司名">
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text="Label"><%# Eval("company_name") %></asp:Label>
                </ItemTemplate>
             </asp:TemplateField>
              <asp:TemplateField HeaderText="状态">
                <ItemTemplate>
                    <asp:Label ID="Label3" runat="server" Text="Label"><%# Eval("status") %></asp:Label>
                </ItemTemplate>
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                </EditItemTemplate>
             </asp:TemplateField>
           
              <asp:CommandField ShowEditButton="True" HeaderText="编辑" />
           
              <asp:BoundField />
           
          </Columns>
            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
            <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <EditRowStyle BackColor="#2461BF" />
            <AlternatingRowStyle BackColor="White" />
        </asp:GridView>

我想在 RowDataBound事件里查找EditItemTemplate里的控件 动态的给空间赋值  可是怎么都找不到值

无语了 总是提示：未将对象因引用设置到对象的实力。

在网上的各种发放都试过了，每一个有用的  请高人帮一下忙  ，小弟现在没分了 ，有哪位高手愿意帮助一下， 谢谢了！

Answer 1

要想RowDataBound时间找到EditItemTemplate里的控件，必须点击编辑按钮执行   protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)        {            GridView1.EditIndex = e.NewEditIndex;            LoadData();//此时绑定数据源时RowDataBound事件函数能找到你的控件。            }  private void LoadData()        {            GridView1.DataSource = GridViewClass.ReadData();            GridView1.DataBind();        }         protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)        {            GridView1.EditIndex = -1;            LoadData();        }         protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)        {            if (e.Row.RowType == DataControlRowType.DataRow)            {               //要想找到控件必须点击EDIT按钮重新绑定DataSource                TextBox txt = (TextBox)e.Row.FindControl("TextBox1");                if (txt != null)                {                    txt.Text ="ggggg";                }            }        }

Answer 2

模板列找控件关键FindControl (e.Row.FindControl(要找的控件ID) as Textbox).Text