Unloading a Page (ListView and custom Render function)

Question

Hey,

I'm trying to get a ListView with a multistage render function (like in the sample) working. The basics seem to work well enough, however the problem I have is that whenever I navigate back before all the Items are rendered, the renderer throws an exception (Unable to set property 'innerText' of undefined or null reference - fair enough as the element no longer exists).

How do I handle this type of unloading of a page?

Thanks for any help,

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Answer 1

I do not think there is any good way to communicate to the render function if you are in the process of rendering the page.  How about you put a try catch block around the processing and exit processing if you get this error?

-Jeff

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Jeff Sanders (MSFT)

Answer 2

Hi Jeff,

this seems to work for the render function. However I have now run into another issue that seems to persist across all apps that use the sample navigator.

When I navigate to a new page (with the navigator.navigate function) and then back very quickly (I used a macro) the app crashes to the terminate app handler and gives me no exception. This happens every time and even with just a basic new Project Grid App. 
So basically is there any way to know what is causing this crash?

Thanks,

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