I have a DataGrid and I would like to be able to display data from what ever cell the mouse is over using the ToolTip service. Can someone tell me what I am doing wrong. Thanks a lot.

Here is my DataGrid:

<DataGrid Name="dgData" CanUserAddRows="False"

                        Style="{DynamicResource DataGridRow}"

                        AutoGenerateColumns="False"

                        CanUserReorderColumns="False"

                        EnableColumnVirtualization="True" />

And here is what I have tried, but my app wont load the DataGrid when I add this.

<Style TargetType="{x:Type DataGrid}">

    <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Mode=Self}, Path=Value}" />

</Style>