Scroll Panel to bottom (last line) on ASP.Net Button Click using C# and VB.Net

Hi nauna,

Refer below code.

HTML

<asp:Panel ID="Panel1" runat="server" Height="100px" ScrollBars="Vertical" style="background-color:antiquewhite;">
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
    Testing <br />
</asp:Panel>
<br />
<asp:Button Text="Scroll to Bottom" runat="server" OnClick="OnScroll" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    function ScrollPanelBottom() {
        var text = $('[id*=Panel1]');
        text.scrollTop(text[0].scrollHeight);
    };
</script>

Code

C#

protected void OnScroll(object sender, EventArgs e)
{
    string script = "window.onload = function() { ScrollPanelBottom(); };";
    ClientScript.RegisterStartupScript(this.GetType(), "message", script, true);
}

VB.Net

Protected Sub OnScroll(sender As Object, e As EventArgs)
    Dim script As String = "window.onload = function() { ScrollPanelBottom(); };"
    ClientScript.RegisterStartupScript(Me.GetType(), "message", script, True)
End Sub

Screenshot