UpdatePanel in EditItemTemplate of Gridview causing full page refresh

Question

I tried to search for solutions, but couldn't find any. Everywhere they are talking about Gridview within UpdatePanel. In my case I have an UpdatePanel within the EditItemTemplate of a Gridview and a DropDownList in that EditItemTemplate is causing postback on SelectChange event. I just want that cell or at most that row of the gridview to be partially rendered, but the whole page flashes.

I have used an update panel elsewhere on that page, but outside the gridview, and it is working fine.

Is UpdatePanel not supported within Gridview templates?

Thanks!

Answer 1

You need to specify AsyncPostBackTrigger inside the <Triggers> element for the UpdatePanel . I tried same and it was working.

<asp:UpdatePanel ID="upSetSession" runat="server">
            <ContentTemplate>
                <asp:DropDownList ID="ddlMyList" runat="server" 
                    onselectedindexchanged="ddlMyList_SelectedIndexChanged"
                    AutoPostBack="true">
                    <asp:ListItem>One</asp:ListItem>
                    <asp:ListItem>Two</asp:ListItem>
                    <asp:ListItem>Three</asp:ListItem>
                </asp:DropDownList>
            </ContentTemplate>
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="ddlMyList" 
                    EventName="SelectedIndexChanged" />
            </Triggers>
        </asp:UpdatePanel>