GridView Control - asp.net

Question

I have a grid control. And I want to access gridview child control from other controls.
Ex:
<asp:UpdatePanel ID="upPersonelAssignment" runat="server">
<ContentTemplate>
<asp:Label ID="lblPersonelName" runat="server" ></asp:Label>
<asp:Label ID="lblUpdatedDateTime" runat="server" ></asp:Label>
<div id="divPersonelAssignmentSearch">
<asp:GridView ID="gvPersonelAssignment" runat="server" DataSourceID="odsPersonelBLL"
AllowSorting="True" AutoGenerateColumns="False"
onrowdatabound="GridView1_RowDataBound">
<Columns>
<asp:CommandField CancelText="Vazgeç" EditText="Amir Ata" ShowEditButton="True"
UpdateText="Amir Kaydet" />
<asp:TemplateField HeaderText="Sicil No">
<ItemTemplate>
<asp:Label ID="lblPersonelSicilNo" runat="server" Text='<%# Eval("personelSicil") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="İsim">
<ItemTemplate>
<asp:Label ID="lblPesonelFirstName" runat="server" Text='<%# Eval("personelAdi") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField> ...
...........
<asp:TemplateField HeaderText="Amir Liste">
<ItemTemplate>
<asp:Label ID="lblAmirList" runat="server" Text="Amir Liste"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
...........
<div id="divDropDownExtender" runat="server">
<act:DropDownExtender ID="ddeAmirList" runat="server"
TargetControlID="lblAmirList" DropDownControlID="">
</act:DropDownExtender>
</div>
But I have error : The TargetControlID of 'ddeAmirList' is not valid. A control with ID 'lblAmirList' could not be found
How to access grid view child control from other control?

Answer 1

using the ondatabound even of the gridview
you can access the control inside your gridview by writing the following:
protected void YourGridView_DataBound(object sender, EventArgs e)
{
Label label1 = (Label)e.Row.Cells[0].FindControl("lblAmirList");
// access your control
label1.Text = "sdfs";
// do this for other controls inside gridview
}

Answer 2

You have to put extenders within the GridView control for this to work, within the template of the control.