Thanks Ludek..,
Dialog box is appearing but not every time report loads. Only on specific moments like refreshing( viewer default refresh button) and while navigating through pages. I have a drop down and a button on same page., user selects some name from drop down and clicks on 'show report' button. now it's showing blank page while report is loading instead of progress bar where it takes around 20 seconds of time to display filtered data.
i can notice the difference after adding below lines of code to web.config. the default text has changed and could see difference by increasing or decreasing delay time but only on refreshing and navigating. I need a progress bar when i click on my button. is there a way to do this..!!
<crystalReportViewer>
<add key="processingIndicatorText" value="Thank you for waiting."/>
<add key="processingIndicatorDelay" value="2"/>
</crystalReportViewer>