WPF:我如何在ListView中应用自定义格式?

My ListView is petty simple:

我的列表很简单:

<ListView ItemsSource="{Binding Path=ActiveCounters}">
    <ListView.View>
        <GridView>
            <GridViewColumn  Header="Name" DisplayMemberBinding="{Binding Path=Name}" />
            <GridViewColumn  Header="Value"  DisplayMemberBinding="{Binding Path=Value}" />
            <GridViewColumn  Header="As Of Date"  DisplayMemberBinding="{Binding Path=AsOfDate}" />
            <GridViewColumn  Header="Duration"  DisplayMemberBinding="{Binding Path=Duration}" />
            <GridViewColumn  Header="Last Modified Date"  DisplayMemberBinding="{Binding Path=Timestamp}" />
        </GridView>
    </ListView.View>
</ListView>
<List