c# - 如何在一行的 PropertyChanges 上调用 StyleSelector

Question

我有带数据网格的 RowStyleSelector。它在窗口加载时被正确调用。在我调用 PropertyChange 时更改行时它不会被调用。

<DataGrid Grid.Row="2" ColumnWidth="*"  ItemsSource="{Binding TraceItemCollectionViewSource , Mode=TwoWay , UpdateSourceTrigger=PropertyChanged}" EnableRowVirtualization="false"  RowStyleSelector="{StaticResource TraceRowStyleSelector}" IsReadOnly="True" Name="TraceDataGrid" Margin="5,5,5,5" Padding="5,5,5,5" AutoGenerateColumns="False">

这是我的模型:

public class TraceDataItem :  ObservableObject
{

    private string _newReelId;
    public string NewReelId
    {
        get { return _newReelId; }
        set
        {
            if (value != _newReelId)
            {
                _newReelId = value;
                RaisePropertyChanged("NewReelId");
            }
        } 
    }


}

如何在调用 PropertyChanged("NewReelId") 时调用 RowStyleSelector。

谢谢。

Answer 1

StyleSelector 不监听 PropertyChange 通知。但是，您可以改用基于 bool 属性的 DataTrigger:

bool _reelIdChanged;
public bool ReelIdChanged 
{
    get { return _reelIdChanged; }
    set
    {
        _reelIdChanged = value;
        RaisePropertyChanged("ReelIdChanged");
    }
}

private string _newReelId;
public string NewReelId
{
    get { return _newReelId; }
    set
    {
        if (value != _newReelId)
        {
            _newReelId = value;
            ReelIdChanged = true;
            RaisePropertyChanged("NewReelId");
        }
        else
            ReelIdChanged = false;
    } 
}

XAML:

<Window.Resources>
    <Style TargetType="DataGridRow" x:Key="TraceRowStyle">
        <Setter Property="Background" Value="{DynamicResource DataBackground}" />
        <Style.Triggers>
            <DataTrigger Binding="{Binding Path=ReelIdChanged }" Value="True">
                <Setter Property="Background" Value="Red" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</Window.Resources>

...

    <DataGrid Grid.Row="0" 
              ColumnWidth="*"  
              ItemsSource="{Binding TraceItemCollectionViewSource  , Mode=TwoWay , UpdateSourceTrigger=PropertyChanged}" 
              EnableRowVirtualization="false"  
              RowStyle="{StaticResource TraceRowStyle}" 
              IsReadOnly="True"
              Name="TraceDataGrid" 
              Margin="5,5,5,5" 
              Padding="5,5,5,5" 
              AutoGenerateColumns="False"/>