I am sorry to hear that the project from the other forum thread was not relevant in your situation. As advised in the thread itself, this implementation is kind of a hack and was designed to work in just one certain scenario.
After some further investigation from our side, what I can suggest for you is to use the GridViewVirtualizingPanel in order to get the page height. Please refer to the following code snippet:
var viewportHeight =
Eventually, you can use it in order to get the number of the visible rows as well:
var visibleRows = viewportHeight /
Please, update me if this information was of help.
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