DataGrid header alignment - wpf

Question

I populate a DataGrid control using DataSet in WPF(c#). I need a way align text of header to center.
Note: During running of my program, It is possible to DataGrid.ItemsSource updated.
It is not same as my previous questions...

Answer 1

<DataGrid ItemsSource="{Binding Items}"
AutoGenerateColumns="True">
<DataGrid.ColumnHeaderStyle>
<Style TargetType="DataGridColumnHeader">
<Style.Setters>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
</Style.Setters>
</Style>
</DataGrid.ColumnHeaderStyle>
</DataGrid>

Answer 2

You just have to style the HorizontalContentAlignment property of the DataGridColumnHeader type. So add to the resources:
<Style TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="HorizontalContentAlignment" Value="Center" />
</Style>
Addendum In general, you can see the control templates at this page on MSDN, which allows you to deduce how to apply the styles you need. In this case, the template for the control DataGridColumnHeader looks like this:
<Grid>
<Border x:Name="columnHeaderBorder" BorderThickness="1" Padding="3,0,3,0">
<!-- (ellided brushes for brevity) -->
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</Border>
<Thumb x:Name="PART_LeftHeaderGripper"
HorizontalAlignment="Left"
Style="{StaticResource ColumnHeaderGripperStyle}" />
<Thumb x:Name="PART_RightHeaderGripper"
HorizontalAlignment="Right"
Style="{StaticResource ColumnHeaderGripperStyle}" />
</Grid>
The ContentPresenter is where the header text is displayed -- you can see that has its HorizontalAlignment set to the control's HorizontalContentAlignment (TemplateBinding). Hence all that's needed is to set that style property on the control type DataGridColumnHeader.