UpdateProgress div positioning - css

Question

I'm trying to show a div on top of my grid view when the grid is loading.
This is how I placed my UpdateProgress, UpdatePanel and GridView:
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdtPnlRefList" >
<ProgressTemplate>
<div style="position: fixed; text-align: center; height: 100%; width: 100%; top: 0; right: 0; left: 0; z-index: 9999999; background-color: #000000; opacity: 0.7;">
<span style="border-width: 0px; position: fixed; padding: 50px; background-color: #FFFFFF; font-size: 36px; left: 40%; top: 40%;">Loading ...</span>
</div>
</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="UpdtPnlRefList" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:GridView>
......
</asp:GridView>
...
I've used the ProgressTemplate code from another question which I've lost track to, however this code greys out the whole page, but i need to only grey out my grid.
Is that possible?

Answer 1

I've achieved this in the past by using the Ajax Control Toolkit's UpdatePanelAnimationExtender control.
<ajaxToolkit:UpdatePanelAnimationExtender ID="UpdatePanelAnimationExtender1" runat="server" TargetControlID="YourUpdatePanel">
<Animations>
<OnUpdating>
<Sequence>
<ScriptAction Script="UpdatePanel_OnUpdating(updatePanelClientID, divToOverlayClientID);" />
<Parallel duration="0">
<FadeOut minimumOpacity=".5" />
</Parallel>
</Sequence>
</OnUpdating>
<OnUpdated>
<Sequence>
<Parallel duration="0" >
<FadeIn minimumOpacity=".5" />
<ScriptAction Script="UpdatePanel_OnUpdated(divToOverlayClientID);" />
</Parallel>
</Sequence>
</OnUpdated>
</Animations>
Ensure that you set the two required ClientIDs on load, like so:
<script type="text/javascript">
var updatePanelClientID = '<%=YourUpdatePanel.ClientID %>';
var divToOverlayClientID = '<%=divUpdateProgress.ClientID %>';
</script>
My div comprises this:
<div id="divUpdateProgress" runat="server" align="center" style="display: none; height: 40px; width: 200px; text-align: center; vertical-align: middle;">
<asp:Image ID="imgProgress" runat="server" ImageUrl="~/images/common/waitspin.gif" />
</div>
The final piece of the puzzle is the pair of JS functions called by the UpdatePanelAnimationExtender. They look like this:
function UpdatePanel_OnUpdating(updatePanelClientID, divClientID) {
// Displays a div over an updating UpdatePanel
// Get the update progress div
var divUpdateProgress = $get(divClientID);
// Make it visible
divUpdateProgress.style.display = '';
// Get the UpdatePanel element
var pnlUpdatePanel = $get(updatePanelClientID);
// Get the bounds of both the UpdatePanel and the progress div
var pnlUpdatePanelBounds = Sys.UI.DomElement.getBounds(pnlUpdatePanel);
var divUpdateProgressBounds = Sys.UI.DomElement.getBounds(divUpdateProgress);
// Work out where to position the element (the centre of the UpdatePanel)
var x = pnlUpdatePanelBounds.x + Math.round(pnlUpdatePanelBounds.width / 2) - Math.round(divUpdateProgressBounds.width / 2);
var y = pnlUpdatePanelBounds.y + Math.round(pnlUpdatePanelBounds.height / 2) - Math.round(divUpdateProgressBounds.height / 2);
// Set the progress element to this position
Sys.UI.DomElement.setLocation(divUpdateProgress, x, y);
}
function UpdatePanel_OnUpdated(divClientID) {
// Related to UpdatePanel_OnUpdating, above. Hides the div once the UpdatePanel has been updated
$get(divClientID).style.display = 'none';
}
This code was originally written almost 10 years ago, but I've just successfully reused it in a legacy project.

Answer 2

<asp:GridView>
<div style="position: relative;">
Code goes here
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdtPnlRefList" >
<ProgressTemplate>
<div style="position: absolute; display: table; width: 100%; text-align: center; top: 0; right: 0; left: 0; bottom: 0; z-index: 9999999; background-color: rgba(255,255,255,0.7);">
<span style="border-width: 0px; padding: 50px; font-size: 36px; display: table-cell"; vertical-align: middle;>Loading ...</span>
</div>
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</asp:GridView>
place the <ProgressTemplate></ProgressTemplate> inside the <asp:GridView></asp:GridView> tags.
and give the <div> a position: relative; and the div inside the <ProgressTemplate></ProgressTemplate> a position: absolute;
.
Don't use opacity as it applies for the whole tag and everything inside. Unless that's exactly what you want.
I have used an rgba(255,255,255,0.7); which will only decrease the opacity of the background color to 70%.
I have vertically centered the <span>Loading ...</span> by adding display: table-cell"; vertical-align: middle; and adding display: table; to the parent tag.
It would be advisable to use a separate stylesheet for all this. =)
Hopefully this helps.
Its a wonderful day to CODE =)