在updatepanels而不是页面中保持列表框中的滚动位置

private int scrollPosition;

private void SaveScrollPosition(int position)
{
    scrollPosition = position;
}

private int GetScrollPosition()
{
    return scrollPosition;
}

var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_beginRequest(beginRequest);
prm.add_endRequest(endRequest);

function beginRequest() {
    var listBox = document.getElementById("<%= ListBox1.ClientID %>");
    var scrollPosition = listBox.scrollTop;
    SaveScrollPosition(scrollPosition);
}

function endRequest() {
    var listBox = document.getElementById("<%= ListBox1.ClientID %>");
    var scrollPosition = GetScrollPosition();
    listBox.scrollTop = scrollPosition;
}