XAML

<Window x:Class="Client_SCM.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Client_SCM"
        mc:Ignorable="d"
        Title="Swords Call Monitor 2.0" Height="350" Width="474">

    <Grid HorizontalAlignment="Stretch"
          VerticalAlignment="Stretch"
          Margin="5"
          ShowGridLines="True">
        <DataGrid x:Name="dataGrid"
                  HorizontalAlignment="Stretch"
                  VerticalAlignment="Stretch"
                  Margin="5"
                  AlternatingRowBackground="Aqua" Loaded="dataGrid_Loaded" AutoGenerateColumns="False">
            <DataGrid.CellStyle>
                <Style TargetType="DataGridCell">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding Path=LocCode}" Value="OK">
                            <Setter Property="DataGridCell.Background" Value="Red"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </DataGrid.CellStyle>
        </DataGrid>

    </Grid>


</Window>