Web Forms :: List Box Jumps Back To Top On Selection Of Item (Postback)
May 5, 2010
I have an asp:ListBox which contains a list of countries. Users select one or more countries and then assign them to another list box on the page.
<asp:ListBox id="countrylist" runat="server" SelectionMode="Multiple" AutoPostBack="True" CssClass="inputC" OnSelectedIndexChanged="countrylist_SelectedIndexChanged"></asp:ListBox>
In Internet Explorer, if I scroll down (say to United States) and then click it, the list scrolls back to the top. United States is still selected, if I press the "Assign" button it will appear within the second list box, and if I scroll down I can see that United States is still selected.
However, users are complaining about this, especially since it happens so quickly that they can't select multiple countries.
I tried using smartnavigation and MaintainScrollPosition, but this has had no effect.
<%@ Page Language="C#" smartNavigation="true" MaintainScrollPositionOnPostback="true" AutoEventWireup="true" EnableEventValidation="false" MasterPageFile="MasterPage.master" CodeFile="form.aspx.cs" Inherits="forms_template" %>
This behaviour is not exhibited in Firefox.
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