AJAX UpdateProgress ASP.NET C# bootstrap masking

 https://www.aspsnippets.com/questions/269449/Hide-Ajax-UpdateProgress-loader-image-after-ResponseEnd-in-ASPNet/

https://www.aspsnippets.com/questions/758411/Hide-UpdateProgress-image-after-download-complete-ResponseEnd-using-C-and-VBNet-in-ASPNet/

https://stackoverflow.com/questions/22242871/load-mask-plugin-for-twitter-bootstrap

we have to use model div and body div etcx.

example

 <div class="modal-header">
        <h1>Processing...</h1>
    </div>
    <div class="modal-body">
        <div class="progress progress-striped active">
            <div class="bar" style="width: 100%;"></div>
        </div>
    </div>