Question

I like to know how to get the ClientID/UniqueID of a control inside a Detailsview controls EditItemTemplate element and when DetailsViews changing to Edit mode and DetailsView is inside a AJAX UpdatePanel. Without UpdatePanel, during PostBack I can get the ClientID’s control, but now with an UpdatePanel.

<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
        <ContentTemplate>
            <asp:DetailsView ID="DetailsView1" runat="server" DataSourceID="SqlDataSource1" AllowPaging="true" AutoGenerateEditButton="true">
                <Fields>
                    <asp:TemplateField>
                        <EditItemTemplate>
                            <asp:CheckBox runat="server" ID="chkboxTest" Text="CHECKBOX" />
                        </EditItemTemplate>
                    </asp:TemplateField>
                </Fields>
            </asp:DetailsView>
        </ContentTemplate>
    </asp:UpdatePanel>

As you see, the EditItemTemplate contains a Checkbox control. So i’m trying to get the ClientID of this checkbox when Detailsview is changing to the Edit mode. I need this value for handling Javascript.

Catching the events ChangingMode/ChangedMode doesn’t work; chkbox is null:

 void DetailsView1_ModeChanged(object sender, EventArgs e)
    {
        if (DetailsView1.CurrentMode == DetailsViewMode.Edit)
        {
            var chkbox = DetailsView1.FindControl("chkboxTest"); // <==  is null
        }
    }

Maybe i’m using the wrong event? Someone can give me a tip about this? Thanks.

Answer 1

Ok, the best thing to do is implement a handler for OnDataBound, then do something like:

  protected void databound(object sender, EventArgs e)
  {
     if (DetailsView1.CurrentMode == DetailsViewMode.Edit)
     {
        var control = DetailsView1.Rows[0].Cells[1].FindControl("chkboxTest");
        if (control != null)
        {
           // Write some JS...
        }
     }
  }