Maintain Browser Scroll Position on Partial PostBack using UpdatePanel ASP.Net

Hi nauna,

The code is working correctly.

Check the below example.

HTML

<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel runat="server">
    <ContentTemplate>
        <asp:Label ID="lblTime" Text="text" runat="server" />
        <asp:Timer ID="timer" runat="server" Interval="1000">
        </asp:Timer>
    </ContentTemplate>
</asp:UpdatePanel>
<hr />
<div id="dvScroll" style="overflow-y: scroll; height: 260px; width: 200px">
    1. This is a sample text<br />
    2. This is a sample text<br />
    3. This is a sample text<br />
    4. This is a sample text<br />
    5. This is a sample text<br />
    6. This is a sample text<br />
    7. This is a sample text<br />
    8. This is a sample text<br />
    9. This is a sample text<br />
    10. This is a sample text<br />
    11. This is a sample text<br />
    12. This is a sample text<br />
    13. This is a sample text<br />
    14. This is a sample text<br />
    15. This is a sample text<br />
    16. This is a sample text<br />
    17. This is a sample text<br />
    18. This is a sample text<br />
    19. This is a sample text<br />
    20. This is a sample text<br />
    21. This is a sample text<br />
    22. This is a sample text<br />
    23. This is a sample text<br />
    24. This is a sample text<br />
    25. This is a sample text<br />
</div>

C#

protected void Page_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    dt.Columns.Add("EndDate", typeof(DateTime));
    dt.Rows.Add("2018-09-28 17:00:34.943");
    DateTime startDate = DateTime.Now;
    DateTime endDate = Convert.ToDateTime(dt.Rows[0]["EndDate"].ToString());
    lblTime.Text = CalculateTimeDifference(startDate, endDate);
}

public string CalculateTimeDifference(DateTime startDate, DateTime endDate)
{
    int days = 0; int hours = 0; int mins = 0; int secs = 0;
    string final = string.Empty;
    if (endDate > startDate)
    {
        days = (endDate - startDate).Days;
        hours = (endDate - startDate).Hours;
        mins = (endDate - startDate).Minutes;
        secs = (endDate - startDate).Seconds;
        final = string.Format("{0} days {1} hours {2} mins {3} secs", days, hours, mins, secs.ToString().PadLeft(2, '0'));
    }
    return final;
}

Screenshot