WPF DataTrigger的使用方法
作者：互联网
效果如下
后台代码
1 using Microsoft.Toolkit.Mvvm.ComponentModel;
2 using System;
3 using System.Collections.Generic;
4 using System.Collections.ObjectModel;
5 using System.ComponentModel;
6 using System.Globalization;
7 using System.Linq;
8 using System.Text;
9 using System.Threading.Tasks;
10 using System.Windows.Data;
11
12 namespace MvvmToolkit学习
13 {
14 public enum EGender
15 {
16 [Description("男")]
17 Men,
18
19 [Description("女")]
20 Women,
21
22 [Description("其他")]
23 Other
24 }
25
26 public class DataTriggerViewModel : ObservableValidator
27 {
28 public DataTriggerViewModel()
29 {
30 var stu1 = new Student()
31 {
32 Id = 1,
33 Name = "黄蓉",
34 Age = 16,
35 Gender = EGender.Women,
36 Height = 1.6,
37 Description = "桃花岛主女儿"
38 };
39 var stu2 = new Student()
40 {
41 Id = 2,
42 Name = "郭靖",
43 Age = 18,
44 Height = 1.8,
45 Gender = EGender.Men,
46 Description = "金刀驸马",
47 };
48 var stu3 = new Student()
49 {
50 Id = 3,
51 Name = "欧阳克",
52 Age = 24,
53
54 Gender = EGender.Men,
55 Height = 1.8,
56 Description = "大坏蛋",
57 };
58 var stu4 = new Student()
59 {
60 Id = 4,
61 Name = "穆念慈",
62 Age = 18,
63 Height = 1.6,
64 Gender = EGender.Women,
65 Description = "美女"
66 };
67 var stu5 = new Student()
68 {
69 Id = 5,
70 Name = "杨康",
71 Age = 18,
72 Height = 1.7,
73 Gender = EGender.Men,
74 Description = "大坏蛋",
75 };
76 Students = new ObservableCollection<Student>();
77 Students.Add(stu1);
78 Students.Add(stu2);
79 Students.Add(stu3);
80 Students.Add(stu4);
81 Students.Add(stu5);
82 }
83
84 public ObservableCollection<Student> Students { get; set; }
85 }
86
87 public class HeightValueConverter : IValueConverter
88 {
89 public double Height { get; set; } = 1.5d;
90
91 public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
92 {
93 if (value == null)
94 {
95 return false;
96 }
97 var height = System.Convert.ToDouble(value);
98 return height >= Height;
99 }
100
101 public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
102 {
103 throw new NotImplementedException();
104 }
105 }
106
107 public class Student : ObservableObject
108 {
109 private int _age;
110 private string _description;
111 private EGender _gender;
112 private double _height;
113 private int _id;
114 private string _name;
115
116 public int Age
117 {
118 get => _age;
119 set => SetProperty(ref _age, value);
120 }
121
122 public string Description
123 {
124 get => _description;
125 set => SetProperty(ref _description, value);
126 }
127
128 public EGender Gender
129 {
130 get => _gender;
131 set => SetProperty(ref _gender, value);
132 }
133
134 public double Height
135 {
136 get => _height;
137 set => SetProperty(ref _height, value);
138 }
139
140 public int Id
141 {
142 get => _id;
143 set => SetProperty(ref _id, value);
144 }
145
146 public string Name
147 {
148 get => _name;
149 set => SetProperty(ref _name, value);
150 }
151 }
152 }
前台代码
1 <Window
2 x:Class="MvvmToolkit学习.DataTriggerView"
3 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
4 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
5 xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
6 xmlns:local="clr-namespace:MvvmToolkit学习"
7 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
8 xmlns:pu="clr-namespace:Panuon.UI.Silver;assembly=Panuon.UI.Silver"
9 Title="DataTriggerView"
10 Width="800"
11 Height="450"
12 d:DataContext="{d:DesignInstance Type=local:DataTriggerViewModel}"
13 mc:Ignorable="d">
14 <Window.Resources>
15 <local:HeightValueConverter x:Key="HeightConverter" Height="1.7" />
16 <Style x:Key="Normal" TargetType="TextBlock">
17 <Setter Property="VerticalAlignment" Value="Center" />
18 <Setter Property="HorizontalAlignment" Value="Left" />
19 <Setter Property="FontSize" Value="18" />
20 <Setter Property="Margin" Value="10,0" />
21 </Style>
22 <DataTemplate x:Key="StudentDatatemplate" DataType="{x:Type local:Student}">
23 <Grid
24 x:Name="BoundaryGrid"
25 Width="450"
26 Margin="5,10">
27 <Grid.ColumnDefinitions>
28 <ColumnDefinition Width="2*" />
29 <ColumnDefinition Width="6*" />
30 <ColumnDefinition Width="3*" />
31 <ColumnDefinition Width="4*" />
32 <ColumnDefinition Width="4*" />
33 <ColumnDefinition Width="8*" />
34 </Grid.ColumnDefinitions>
35 <TextBlock
36 x:Name="IdTextBlock"
37 Grid.Column="0"
38 Style="{StaticResource Normal}"
39 Text="{Binding Id}" />
40 <TextBlock
41 x:Name="NameTextBlock"
42 Grid.Column="1"
43 Style="{StaticResource Normal}"
44 Text="{Binding Name}" />
45 <ComboBox
46 Grid.Column="2"
47 pu:ComboBoxHelper.BindToEnum="{x:Static local:EGender.Men}"
48 SelectedValue="{Binding Gender}" />
49 <TextBlock
50 Grid.Column="3"
51 Style="{StaticResource Normal}"
52 Text="{Binding Age}" />
53 <TextBlock
54 x:Name="HeightTextBlock"
55 Grid.Column="4"
56 Style="{StaticResource Normal}"
57 Text="{Binding Height}" />
58 <TextBlock
59 Grid.Column="5"
60 Style="{StaticResource Normal}"
61 Text="{Binding Description}" />
62 </Grid>
63 <DataTemplate.Triggers>
64 <!-- 当Age=16时候，改变文本的Foreground -->
65 <DataTrigger Binding="{Binding Age}" Value="16">
66 <Setter TargetName="IdTextBlock" Property="TextBlock.Foreground" Value="Blue" />
67 </DataTrigger>
68 <!-- 设置性别的颜色 -->
69 <DataTrigger Binding="{Binding Gender}" Value="{x:Static local:EGender.Women}">
70 <Setter TargetName="NameTextBlock" Property="TextBlock.Background" Value="Pink" />
71 </DataTrigger>
72 <DataTrigger Binding="{Binding Gender}" Value="{x:Static local:EGender.Men}">
73 <Setter TargetName="NameTextBlock" Property="TextBlock.Background" Value="LightBlue" />
74 </DataTrigger>
75 <!-- 设置高度的颜色 当高度>1.7的时候设置背景色(使用转换器) -->
76 <DataTrigger Binding="{Binding Height, Converter={StaticResource HeightConverter}}" Value="True">
77 <Setter TargetName="HeightTextBlock" Property="TextBlock.Background" Value="Green" />
78 </DataTrigger>
79 <!-- 多条件触发，Men和Description为大坏蛋的时候 禁用控件同时设置背景颜色 -->
80 <MultiDataTrigger>
81 <MultiDataTrigger.Conditions>
82 <Condition Binding="{Binding Gender}" Value="{x:Static local:EGender.Men}" />
83 <Condition Binding="{Binding Description}" Value="大坏蛋" />
84 </MultiDataTrigger.Conditions>
85 <Setter TargetName="BoundaryGrid" Property="Grid.IsEnabled" Value="False" />
86 <Setter TargetName="BoundaryGrid" Property="Grid.Background" Value="Gray" />
87 </MultiDataTrigger>
88 </DataTemplate.Triggers>
89 </DataTemplate>
90 </Window.Resources>
91
92 <Grid>
93 <ListBox ItemTemplate="{StaticResource StudentDatatemplate}" ItemsSource="{Binding Students}" />
94 </Grid>
95 </Window>
标签：Description,DataTrigger,get,System,value,using,WPF,方法,public 来源： https://www.cnblogs.com/AtTheMoment/p/16403294.html