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asid72 Frequent Visitor
Frequent Visitor

Refresh Direct Query Report on TV without showing it refresh

We have Power BI Report we want to display on our TV and have it auto refresh periodically. I know current solution is to use the google chrome extension to refresh the browser when using direct query report. I was trying to implement similar method using JavaScript and iframe. The solution works, but I want a want to have the report refresh without having the user see the report refresh. My workaround was to JavaScript load my report and then load a new report hidden in the background. Then, once the hidden report is fully rendered, the script would hide the old report and make the new report visible. This would happen every 15 seconds. Unfortunately, the report is not fully loaded/rendered once the swap happens.  Anyone have any suggestions or advice in fixing this?

 

Here is the script I have been using:

<html>
<iframe id="xIfrWidget0" width="100%" height="100%" style="display:none"></iframe>
<iframe id="xIfrWidget1" width="100%" height="100%" style="display:none"></iframe>

<script type="text/javascript">
var ifrNo = 0;
var ifrHidden;
var ifr;

function swap() 
{

ifr = document.getElementById('xIfrWidget' + ifrNo);
ifrNo = 1 - ifrNo;
ifrHidden = document.getElementById('xIfrWidget' + ifrNo);

ifr.onload = null;

ifrHidden.onload = function() {

ifr.style.display = 'none';
ifrHidden.style.display = 'block';


}
// Put in your Power BI Report Link
ifrHidden.src="https://app.powerbi.com/reportEmbed?reportId=..."; 
}

setInterval(function () 
{
swap();
}, 15000)
</script>
</html>

 

The solution is from: http://codecorner.galanter.net/2016/05/05/flicker-free-iframe-refresh/

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