MVVM_UI和逻辑分离（事件利用命令替换），命令代替事件，命令传递事件参数，附完整demo
近期公司重构了些界面，因为换肤和界面定制的缘故，需要把样式和逻辑分开；所以记录下关键的操作；主要是利用命令代替事件，利用命令传递事件的参数...
先大致看下效果：
主要是利用 Prism 库，可直接利用 nuget 添加
下面是详细代码：
1 <Window x:Class="Demo_MVVM.MainWindow" 2 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 3 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 4 xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 5 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 6 xmlns:local="clr-namespace:Demo_MVVM" 7 xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" 8 xmlns:prism="http://www.codeplex.com/prism" 9 mc:Ignorable="d" 10 Title="MainWindow" 11 WindowStartupLocation="CenterScreen" 12 Height="350" 13 Width="400" 14 DataContext="{DynamicResource vm}" 15 > 16 <Window.Resources> 17 <local:ReverseBool x:Key="ReverseBool" /> 18 19 <DataTemplate x:Key="Template1"> 20 <TextBlock Text="{Binding IsTemplate1,StringFormat=我是模板1：{0}}"/> 21 </DataTemplate> 22 23 <DataTemplate x:Key="Template2"> 24 <TextBlock Text="{Binding IsTemplate1,StringFormat=我是模板2：{0}}"/> 25 </DataTemplate> 26 27 <local:MainWindowViewModel x:Key="vm"/> 28 </Window.Resources> 29 <Grid> 30 <StackPanel> 31 <TextBlock Text="采用mvvm，UI和逻辑分离" /> 32 <StackPanel Orientation="Horizontal"> 33 <RadioButton Content="模板1" IsChecked="{Binding IsTemplate1}" GroupName="mb" /> 34 <RadioButton Content="模板2" IsChecked="{Binding IsTemplate1,Converter={StaticResource ReverseBool}}" GroupName="mb" /> 35 </StackPanel> 36 <ContentControl Content="{Binding}"> 37 <ContentControl.Style> 38 <Style TargetType="ContentControl"> 39 <Setter Property="ContentTemplate" Value="{StaticResource Template1}" /> 40 <Style.Triggers> 41 <DataTrigger Binding="{Binding IsTemplate1}" Value="false"> 42 <Setter Property="ContentTemplate" Value="{StaticResource Template2}" /> 43 </DataTrigger> 44 </Style.Triggers> 45 </Style> 46 </ContentControl.Style> 47 </ContentControl> 48 49 <TextBox Text="这里面实现了鼠标滚动获取滚动向量" Height="100" > 50 <i:Interaction.Triggers> 51 <i:EventTrigger EventName="PreviewMouseWheel"> 52 <prism:InvokeCommandAction Command="{Binding MouseWheelCommand}"/> 53 </i:EventTrigger> 54 </i:Interaction.Triggers> 55 </TextBox> 56 </StackPanel> 57 <i:Interaction.Triggers> 58 <i:EventTrigger EventName="Loaded"> 59 <prism:InvokeCommandAction Command="{Binding InitCommand}"/> 60 </i:EventTrigger> 61 </i:Interaction.Triggers> 62 </Grid> 63 </Window>
1 using Prism.Commands; 2 using System; 3 using System.Collections.Generic; 4 using System.ComponentModel; 5 using System.Linq; 6 using System.Text; 7 using System.Threading.Tasks; 8 using System.Windows; 9 using System.Windows.Input; 10 11 namespace Demo_MVVM 12 { 13 class MainWindowViewModel : INotifyPropertyChanged 14 { 15 private bool isTemplate1 = true; 16 17 public event PropertyChangedEventHandler PropertyChanged; 18 19 public ICommand InitCommand { get; private set; } 20 public DelegateCommand<object> MouseWheelCommand { get; set; } 21 22 public bool IsTemplate1 23 { 24 get => isTemplate1; 25 set 26 { 27 isTemplate1 = value; 28 PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsTemplate1))); 29 } 30 } 31 32 33 public MainWindowViewModel() 34 { 35 InitCommand = new DelegateCommand(Init); 36 MouseWheelCommand = new DelegateCommand<object>(MouseWheel); 37 } 38 39 void Init() 40 { 41 MessageBox.Show("初始化完成！"); 42 } 43 44 void MouseWheel(object obj) 45 { 46 if (obj is MouseWheelEventArgs eventArgs) 47 { 48 MessageBox.Show("滚动了：" + eventArgs.Delta); 49 } 50 } 51 } 52 }
有需要完整demo的，包含所需要的库，请移步下载
