官方文档中对DataTrigger的介绍

Represents a trigger that applies property values or performs actions when the bound data meets a specified condition.

某词典的翻译:
当绑定的数据满足指定的条件时,应用(指定的)属性或执行操作的触发器

下面我演示一遍官方文档中的示例,根据官网的描述,建立实体类,然后编写前台代码

• 先来张效果图

  • 
  • 通过DataTrigger,将省份为江苏省的Item项的文字颜色设置成了红色;
  • 然后又通过MultoDataTrigger,将省份为江西省市为南昌的Item设置的背景设置成浅蓝色
  • 关键部分代码:

    <Page.Resources>
        <dataTrigger:Places x:Key="Places"/>
        <Style TargetType="ListBoxItem">
            <Style.Triggers>
                <DataTrigger Binding="{Binding Path=Province}" Value="江苏省">
                    <Setter Property="Foreground"  Value="Red"/>
                </DataTrigger>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding Path=Province}" Value="江西省"/>
                        <Condition Binding="{Binding Path=Name}" Value="南昌"/>
                    </MultiDataTrigger.Conditions>
                    <Setter Property="Background" Value="Cyan"/>
                </MultiDataTrigger>
            </Style.Triggers>
        </Style>
        <DataTemplate x:Key="PlaceTemplate" DataType="{x:Type dataTrigger:Place}">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Province,Mode=OneWay,StringFormat={}{0}- - &#160;&#160;}"/>
                <TextBlock Text="{Binding Name,Mode=OneWay}"/>
            </StackPanel>
        </DataTemplate>
    </Page.Resources>
    <Grid>
        <ListBox Margin="20 30" 
                 MaxWidth="300" MaxHeight="250"
                 ItemsSource="{StaticResource Places}"
                 ItemTemplate="{StaticResource PlaceTemplate}">
        </ListBox>
    </Grid>
    

• 新建一个测试项目:

  • 

• 添加两个类:

  • Place
  • Places

    namespace Demo.DataTrigger
    {
        public class Place
        {
            public string Name { get; set; }
            public string Province { get; set; }
    
            public Place(string name,string province)
            {
                Name = name;
                Province = province;
            }
        }
    }
    
    
    using System.Collections.ObjectModel;
    namespace Demo.DataTrigger
    {
        public class Places:ObservableCollection<Place>
        {
            public Places()
            {
                Add(new Place("南京", "江苏省"));
                Add(new Place("宁波", "浙江省"));
                Add(new Place("苏州", "江苏省"));
                Add(new Place("南通", "江苏省"));
                Add(new Place("深圳", "广州省"));
                Add(new Place("芜湖", "安徽省"));
                Add(new Place("东菀", "广东省"));
                Add(new Place("无锡", "江苏省"));
                Add(new Place("南昌", "江西省"));
            }
        }
    }
    

• xaml代码

  <Page.Resources>
      <dataTrigger:Places x:Key="Places"/>
      <Style TargetType="ListBoxItem">
          <Style.Triggers>
              <DataTrigger Binding="{Binding Path=Province}" Value="江苏省">
                  <Setter Property="Foreground"  Value="Red"/>
              </DataTrigger>
              <MultiDataTrigger>
                  <MultiDataTrigger.Conditions>
                      <Condition Binding="{Binding Path=Province}" Value="江西省"/>
                      <Condition Binding="{Binding Path=Name}" Value="南昌"/>
                  </MultiDataTrigger.Con