Mars200/FrameworkLocal/UICore/DeviceControl/EventLogComboView.xaml

<UserControl x:Class="MECF.Framework.UI.Core.DeviceControl.EventLogComboView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:MECF.Framework.UI.Core.DeviceControl"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <UserControl.Resources>
        <local:DateTimeToTextConverter x:Key="dateTimeToTextConverter"/>
        <local:CollectionLastIndexConverter x:Key="collectionLastIndexConverter" />

    </UserControl.Resources>
    <ComboBox ItemsSource="{Binding EventLogList}" 
              SelectedIndex="{Binding EventLogList.Count,Mode=OneWay,Converter={StaticResource collectionLastIndexConverter}}" 
              VerticalContentAlignment="Center" FontSize="20" Height="35"   >
        <ComboBox.ItemTemplate>
            <DataTemplate>
                <ContentControl>
                    <ContentControl.Style>
                        <Style TargetType="ContentControl">
                            <Setter Property="Background" Value="#F0F0F0"/>
                            <Style.Triggers>
                                <DataTrigger Binding="{Binding Level}" Value="Alarm">
                                    <Setter Property="Foreground" Value="Red"/>
                                </DataTrigger>
                                <DataTrigger Binding="{Binding Level}" Value="Warning">
                                    <Setter Property="Foreground" Value="#FF8C00"/>
                                </DataTrigger>
                                <DataTrigger Binding="{Binding Level}" Value="Information">
                                    <Setter Property="Foreground" Value="Black"/>
                                </DataTrigger>
                            </Style.Triggers>
                        </Style>
                    </ContentControl.Style>
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="130"/>
                            <ColumnDefinition Width="120"/>
                            <ColumnDefinition Width="60"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>
                        <TextBlock Margin="8,0,0,0" Grid.Column="0" Text="{Binding OccuringTime, Converter={StaticResource dateTimeToTextConverter}}" />
                        <TextBlock Grid.Column="2" Text="{Binding Id}" Margin="8,0,0,0"/>
                        <TextBlock Grid.Column="1" Text="{Binding Source}" Margin="8,0,0,0" />
                        <TextBlock Grid.Column="3" Text="{Binding Description}" Margin="8,0,0,0"/>
                    </Grid>
                </ContentControl>
            </DataTemplate>
        </ComboBox.ItemTemplate>
    </ComboBox>
</UserControl>