WPF Style Trigger for DataGridRow Background Color Trumped by AlternatingRowBackground Brush

Question

I have a WPF DataGrid which has an AlternatingRowBackground brush. It\'s configured to color every other row. I\'d like to do something on mouse over that highlights the c

Answer 1

There's two ways to do this, neither is particularly obvious. Since DataGridRow transfers (in code) the background property from the parent DataGrid to a local value in the row, as you noted it will take precedence over the value set by your trigger.

The first (and simplest) way is to not use the AlternatingRowBackground or RowBackground but instead use triggers to alternate the background color as Val suggested. His example is not complete though and will not work as-is. The correct style and usage would be as follows. Note that you need to set the AlternationCount on DataGrid or else the rows will never get alternating indexes.

The second option is to use the VisualStateManager. This gives you far more control over the different visual states but it is more verbose. Fortunately it's quite easy to copy the default control template using Blend. Most of the following is unchanged except the Storyboard in the MouseOver state and I've set a background on the selectiveScrollingGrid.

Sorry for the wrap, but like I said, it's a bit more verbose.