How to get the row of image in a DataGrid?

Question

I have images in one of the columns of my WPF DataGrid. I need to generate dynamic tooltips for them so I created a handler for the ToolTipOpening event. But the problem is that sender of this event is instance of Image class and it doesn't have any information about row where event happened while I need it to generate tooltips. I have CellContentTemplate for this column defined like this

<DataTemplate x:Key="SomeTemplate" x:Shared="true">
    <Image Name="SomeImage"
           Style="{StaticResource SomeStyle}"
           Width="16"
           Height="16"
           HorizontalAlignment="Center"
           VerticalAlignment="Center"
           Stretch="None"
           ToolTipOpening="SomeTooltipHandler"/>
</DataTemplate>

Any ideas how get a row number in my handler?

Answer 1

Since an Image is a DependencyObject, you can find its ancestor using the VisualTreeHelper.GetParent. So, to find the DataGrid for instance:

public static DataGrid FindDataGridAncestor(DependencyObject dependencyObject)
{
        DependencyObject target = dependencyObject;
        do
        {
            target = VisualTreeHelper.GetParent(target);
        }
        while (target != null && !(target is DataGrid));

        return target as DataGrid;
}

Usage:

DataGrid myGrid = FindDataGridAncestor(myImage);