c# - 以编程方式更改单个 ListViewItem 布局

Question

我有ListView一个GridView在里面：

<ListView x:Name="listViewPersons" ItemsSource="{Binding Path=Persons, Mode=OneWay}" IsSynchronizedWithCurrentItem="True" 
                  Height="Auto" HorizontalAlignment="Stretch" Margin="4,4,4,4" Grid.Row="4" VerticalAlignment="Stretch" Width="Auto">
            <ListView.View>
                <GridView x:Name="gridViewPersons">
                    <GridViewColumn Header="Enabled">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <StackPanel>
                                    <CheckBox HorizontalAlignment="Center" IsChecked="true" />
                                </StackPanel>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                    <GridViewColumn Header="Name"  DisplayMemberBinding="{Binding Path=Name}" Width="142" />
                    <GridViewColumn Header="Age"  DisplayMemberBinding="{Binding Path=Age}" Width="142" />
                    <GridViewColumn Header="Gender"  DisplayMemberBinding="{Binding Path=Gender}" Width="142" />
                </GridView>
            </ListView.View>
        </ListView>

我希望能够以编程方式将每个ListViewItems（或网格中的行）背景或前景更改为我想要的任何颜色，例如

listViewPersons.Items[0].Background = Brush.Red;
listViewPersons.Items[1].Background = Brush.Blue;
listViewPersons.Items[2].Background = Brush.Green

我知道前面的代码行不起作用，但它几乎解释了我想要实现的目标。有什么帮助吗？

谢谢！

score 2 · Accepted Answer

这种方法怎么样：

将 ForegroundColor 和 Background 颜色绑定到 Persons 中的属性。让我们将此属性称为 PersonStatus，并将其类型设置为状态枚举，仅用于此示例。

确保此 Persons 实现INotifyPropertyChanged，并且此属性的设置器引发ProperyChanged事件。该属性将如下所示：

public Status PersonStatus
{
    get
    {
        return status;
    }
    set
    {
        if (value != status)
        {
            status= value;
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs("PersonStatus"));
        }
    }
}

创建一个IValueConverter，它采用 Status 类型并返回 Brushes.Black、Brushes.Red 等。像这样：

public class StatusToColorConverter : IValueConverter 
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        if (targetType != typeof(Status))
            throw new InvalidOperationException("targetType must be Status");

        Status status = (Status)value;

        switch (status)
        {
            case Status.New:
                return Brushes.Black;
            case Status.Professional:
                return Brushes.Blue;
            case Status.Delete:
                return Brushes.Red;
            default:
                return Brushes.Black;
        }
    }

    public object ConvertBack(object value, Type targetType, object parameter,  System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    } 
}

c# - 以编程方式更改单个 ListViewItem 布局

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