[Solved] Image caching in GridTemplateColumn

[Andrea]

Hi all,
i'm facing with images behaviour in GridTemplateColumns.

I have a grid with two GridTemplateColumns, first with an image object and second with a panel object.

image ImageUrl parameter is set in grid ItemDataBound event, and it points to a custom HttpHandler which downloads an image from my database and renders it on the browser.

Unfortunately, when i change grid datasource, image ImageUrl is programmatically set to the right new imageUrl, while the grid renders the previous image. If i inspect the image url, it really points to previous url, instead of new one.

I tried yet to expire and disable cache of my page, but it still doesn't work.

here is my grid

<telerik:RadGrid ID="RadGrid1" runat="server" >
    <MasterTableView DataKeyNames="ID_N" AutoGenerateColumns="false" ShowHeader="true">
        <Columns>
            <telerik:GridTemplateColumn>
                <ItemTemplate>
                   <asp:Image ID="Image1" runat="server" CssClass="AssetImage"  />
                </ItemTemplate>
            </telerik:GridTemplateColumn>
            <telerik:GridTemplateColumn >
                <ItemTemplate>
                    <asp:Panel runat="server" ID="Panel1"></asp:Panel>
                </ItemTemplate>
            </telerik:GridTemplateColumn>
        </Columns>
    </MasterTableView>
</telerik:RadGrid>

and here is the ItemDataBound handler

Private Sub RadGrid1_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid1.ItemDataBound

  If e.Item.ItemType = Telerik.Web.UI.GridItemType.Item OrElse e.Item.ItemType = Telerik.Web.UI.GridItemType.AlternatingItem Then

            Dim GDI As Telerik.Web.UI.GridDataItem = DirectCast(e.Item, Telerik.Web.UI.GridDataItem)
            Dim DRV As DataRowView = DirectCast(GDI.DataItem, DataRowView)

            Dim img As Image = DirectCast(GDI.FindControl("Image1"), Image)
            img.ImageUrl = String.Format("assetimg.ashx?IDN={0}&BH=100&BW=100&CAT={1}", DRV("ID_N"), Me.Category)

 End If
End Sub