Programmatically assigning a color to a row in DataGrid

You can handle the DataGrid's LoadingRow event to detect when a row is being added. In the event handler you can get a reference to the DataRow that was added to the DataTable that is acting as your ItemsSource. Then you can update the DataGridRow's color however you like.

void dataGrid_LoadingRow(object sender, Microsoft.Windows.Controls.DataGridRowEventArgs e){    // Get the DataRow corresponding to the DataGridRow that is loading.    DataRowView item = e.Row.Item as DataRowView;    if (item != null)    {        DataRow row = item.Row;            // Access cell values values if needed...            // var colValue = row["ColumnName1]";            // var colValue2 = row["ColumName2]";        // Set the background color of the DataGrid row based on whatever data you like from         // the row.        e.Row.Background = new SolidColorBrush(Colors.BlanchedAlmond);    }           }

To sign up for the event in XAML:

<toolkit:DataGrid x:Name="dataGrid"    ...    LoadingRow="dataGrid_LoadingRow">

Or in C#:

this.dataGrid.LoadingRow += new EventHandler<Microsoft.Windows.Controls.DataGridRowEventArgs>(dataGrid_LoadingRow);

U can try this

In the XAML

<Window.Resources><Style TargetType="{x:Type DataGridRow}">    <Style.Setters>        <Setter Property="Background" Value="{Binding Path=StatusColor}"></Setter>    </Style.Setters>            </Style></Window.Resources>

In the datagrid

<DataGrid AutoGenerateColumns="False" CanUserAddRows="False" Name="dtgTestColor" ItemsSource="{Binding}" ><DataGrid.Columns>                                <DataGridTextColumn Header="Valor" Binding="{Binding Path=Valor}"/></DataGrid.Columns></DataGrid>

In the code i have a class with

public class ColorRenglon{    public string Valor { get; set; }    public string StatusColor { get; set; }}

When set the DataContext

dtgTestColor.DataContext = ColorRenglon;dtgTestColor.Items.Refresh();

If u not set the color of the row the default value is Grey

u can try this sample with this sample

List<ColorRenglon> test = new List<ColorRenglon>();ColorRenglon cambiandoColor = new ColorRenglon();cambiandoColor.Valor = "Aqui va un color"; cambiandoColor.StatusColor = "Red";test.Add(cambiandoColor);cambiandoColor = new ColorRenglon();cambiandoColor.Valor = "Aqui va otro color"; cambiandoColor.StatusColor = "PaleGreen";test.Add(cambiandoColor);

IMPORTANT : be sure to always assign defaults for rows that aren't being colored by a condition - or any other style.

See my answer to C# Silverlight Datagrid - Row Color Change.

PS. I am in Silverlight and haven't confirmed this behavior in WPF