How to get OCR to read the entire contents of a Print Preview? GetText reading first line only

I am trying to use OCR to get the contents of a print preview page of a WCF application. The Print preview is in a grid format. The GetText method reads the first line of the grid and does not continue further. 

I tried to get the picture object to the contents of the grid I want to verify. But in this case the GetText does not return anything.