Vertical alignment of DatagridCell

Setting DataGrid RowHeight and the following DatagridCell style is making only the row bigger and not the cell from the image inserted. Please help me to correct this.

 <Style TargetType="DataGridCell">
            <Setter Property="VerticalAlignment"
                    Value="Center" />
 </Style>

 <DataGrid x:Name="TestGrid"
                  CanUserAddRows="False"
                  AutoGenerateColumns="False"
                  RowHeight="30">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Name"
                                    Width="100"
                                    Binding="{Binding Name}" />
                <DataGridTextColumn Header="Age"
                                    Width="100"
                                    Binding="{Binding Age}" />
                <DataGridTextColumn Header="Location"
                                    Width="100"
                                    Binding="{Binding Location}" />
            </DataGrid.Columns>
        </DataGrid>

Regards,

Ramakrishna

Ramakrishna