How to use Ajax Update Progress

Step 1

Drag and drop the script manager from the ToolBox under the body and the form tag.

<asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>

Step 2

Drag and drop the updatepanel from toolbox  

  <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate
<asp:Button ID="Button1" runat="server" Text="Submit" onclick="Button1_Click"
                        style="height: 26px" />               
        </ContentTemplate>
        </asp:UpdatePanel>

Step 3

Drag and drop the update progress from the toolbox. Remember one thing that the update progress is outside the update panel on the same page 

   <asp:UpdateProgress ID="UpdateProgress1" runat="server"
        AssociatedUpdatePanelID="UpdatePanel1" DisplayAfter="0">
    <ProgressTemplate>
        <div style="background-color: Gray; filter:alpha(opacity=60); opacity:0.60; width: 100%; top: 0px; left: 0px; position: fixed; height: 100%;">
        </div>
          <div style="margin:auto;
              font-family:Trebuchet MS;
              filter: alpha(opacity=100);
              opacity: 1;
              font-size:small;
              vertical-align: middle;
              top: 45%;
              position: fixed;
              right: 45%;
              color: #275721;
              text-align: center;
              background-color: White;
              height: 120px;">
                <table style=" background-color: White; font-family: Sans-Serif; text-align: center; border: solid 1px #275721; color: #275721; width: inherit; height: inherit; padding: 15px;">
                <tr>
                <td style=" text-align: inherit;"><img src="Images/ajax-loader.gif" alt="Loading"  /></td>
                </tr>
                </table>
        </div>
    </ProgressTemplate>
</asp:UpdateProgress>

Step 4

Goto the Code behind the file and write this code. Wait for 2 Second and after that get the Message:

protected void Button1_Click(object sender, EventArgs e)
{

   System.Threading.Thread.Sleep(2000);  //wait 2 second
   Response.Write("Welcome User");
}