You can achieve it by using UpdateProgress inside a UpdatePanel.
Sample designer code
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<%=DateTime.Now.ToString() %> <br />
<asp:Button ID="Button1" runat="server" Text="Refresh Panel" OnClick="Button_Click" />
<asp:UpdateProgress ID="UpdateProgress1" AssociatedUpdatePanelID="UpdatePanel1" runat="server">
<ProgressTemplate>
UpdatePanel1 updating...
</ProgressTemplate>
</asp:UpdateProgress>
</ContentTemplate>
</asp:UpdatePanel>
</div>
Refer the
below MSDN link you will get more idea in Update progress
MSDN Link[
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Thanks,
-RG