Adjust listview rowheight based on a condition

Hi,

Is it possible to adjust the row height of a listview based on a condition?
My Condition: If the value of {Binding isMediaUrlNull} is true set the height as 250 else 500.
Either in xaml or in class I need to add this condition. For avoiding the blank space between the items I am applying this.

Please suggest a solution for this
Thanks in advance