Confirm in ItemDataBound

rstelma · December 4th, 2006, 08:46 PM

Hi All,

I'm trouble getting a javascript confirm to work in a datagrid.

Here is the front side code:

Code:

<asp:TemplateColumn ItemStyle-HorizontalAlign="Center" HeaderText="Delete">
<ItemTemplate>
<asp:ImageButton CommandName="Delete" ID="btnDelete" ImageUrl="/images/delete_cir.gif" Runat="server" />
</ItemTemplate>
</asp:TemplateColumn>

I pulled this code from 4GuysFromRolla but keep getting the error:
Specified cast is not valid.

Code:

Sub grdLeakRates_ItemDataBound(ByVal s As Object, ByVal e As DataGridItemEventArgs) Handles grdLeakRates.ItemDataBound
If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
Dim btnDelete As ImageButton = e.Item.Cells(0).Controls(0)
btnDelete.Attributes("onclick") = "javascript: return " & _
"confirm('Are you sure?')"
End If
End Sub

I know I'm not connecting this correclty but I've tried BoundColumn, ButtonColumn... and all kinds of other stuff.

Any help would be greatly appreciated.

Thanks,
Richard

mike_remember · December 5th, 2006, 02:15 AM

Just use the code below which also uses a javascript function named ConfirmDelete() as below:

Dim imgButton As ImageButton
            If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
                imgButton = CType(e.Item.FindControl("btnDelete"), ImageButton)
                imgButton.Attributes.Add("onclick","javascript:ret urn ConfirmDelete();")

            End If

-----------------------------------------
JS Function (copy this in the HTML part)
-----------------------------------------

function ConfirmDelete()
        {
            if (confirm("Are you sure you want to delete this category?"))
                return true;
            else
                return false;

        }

Regards
Mike

Fortune favours the brave, so don't regret on missed oppurtunities.

rstelma · December 5th, 2006, 12:43 PM

Hi Mike,

That worked! Really appreciate you taking the time to respond.

So the CType function casts the control as an image button?

Thank you,
Richard

mike_remember · December 6th, 2006, 02:10 AM

Yup

CType is used for casting..........

Regards
Mike

Fortune favours the brave, so don't regret on missed oppurtunities.