Change the Background Color of Entire Column of WPF DataGrid at RunTime

The only way I got it to work is by setting the columns by myself, (by not using AutoGenerate). So first thing to do is define the columns:

<DataGrid x:Name="Frid" ItemsSource="{Binding Path=.}">        <DataGrid.Columns>            <DataGridTextColumn Header="First Name"                                 Binding="{Binding Path=FirstName}">            </DataGridTextColumn>            <DataGridTextColumn Header="Last Name"                                 Binding="{Binding Path=LastName}">            </DataGridTextColumn>        </DataGrid.Columns>    </DataGrid> 

Then you need to set each column CellStyle and bind the Background to a static resource that you can declare at Window.Resources:

<Window x:Class="WpfApplication1.MainWindow" ...><Window.Resources>    <SolidColorBrush x:Key="clBr" Color="White" /></Window.Resources>...

Columns:

                <DataGridTextColumn Header="First Name"                                     Binding="{Binding Path=FirstName}">                <DataGridTextColumn.CellStyle>                    <Style TargetType="DataGridCell">                        <Setter Property="Background"                                 Value="{StaticResource clBr}" />                    </Style>                </DataGridTextColumn.CellStyle>            </DataGridTextColumn>

then you can just manipulate the static resource by either code or xaml manipulation.

Hope it helps.

A bit old, but here is how you can do this programmatically (for AutoGen columns):

private void dgvMailingList_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e){    e.Column.CellStyle = new Style(typeof(DataGridCell));    e.Column.CellStyle.Setters.Add(new Setter(DataGridCell.BackgroundProperty,  new SolidColorBrush(Colors.LightBlue)));}

The same approach can be applied to non-AutoGen columns too.