Question

I’m embedding a Report into an iframe (the report is fetched with .NET ReportingServices)

I’d like to launch a Javascript function once the report is loaded.

I tried:

window.addEventListener("load", ...)

But as the report result is loaded with Javascript, window.load is triggered before the report is effectively loaded.

Are there some Javascript functions exposed that would allow me to handle the report load? Like:

the_report.loaded(function () {
  alert(document.height);
});

By the way the aim is to get the final rendered document height.

Answer 1

Javascript support is minimal at best. Sadly these controls are still behind with the times on most fronts. You can find what is exposed and documented here:

http://msdn.microsoft.com/en-us/library/dd756405(VS.100).aspx

Luckily for you there is a get_isLoading() function you can call:

http://msdn.microsoft.com/en-us/library/dd756413(v=vs.100).aspx

Try something like this:

(function() {

    var onLoad = function() {
       // Do something...
    };
    var viewerReference = $find("ReportViewer1");

    setTimeout(function() {
        var loading = viewerReference.get_isLoading();

        if (!loading) onLoad(); 
    },100);

})();