Wpf 在代码隐藏中处理事件并调用视图模型'；在某个事件上的命令
以下是概述： 我使用一个自定义控件（CusCtrl）来显示任务栏图标，它还有一个弹出属性。因此，当您单击图标时，CUSCRL将显示弹出窗口 我正在使用UserControl设置弹出窗口的子项（比如说UC1） 我正在使用ViewModel设置CUSCRL的DataContext，因此甚至UC1也会绑定到相应的ViewModel（比如说VM1） 现在UC1有了一些元素-一个标签，单击标签我需要两件事：Wpf 在代码隐藏中处理事件并调用视图模型'；在某个事件上的命令,wpf,mvvm,routed-events,Wpf,Mvvm,Routed Events,以下是概述： 我使用一个自定义控件（CusCtrl）来显示任务栏图标，它还有一个弹出属性。因此，当您单击图标时，CUSCRL将显示弹出窗口 我正在使用UserControl设置弹出窗口的子项（比如说UC1） 我正在使用ViewModel设置CUSCRL的DataContext，因此甚至UC1也会绑定到相应的ViewModel（比如说VM1） 现在UC1有了一些元素-一个标签，单击标签我需要两件事： 在视图模型VM1上调用命令- 通过该命令，我需要将视图模型的一些属性作为参数传递，并打开一些窗口U
我是否认为这是正确的方法，或者有更好的更干净的方法来执行一些UI操作，并通过坚持使用MVVM关闭弹出窗口？下一个解决方案如何；尝试使用Popup.IsOpen属性（，下面是使用示例）。直接或通过CusCtrl用户控件的DependencyProperty将其绑定到UC1 DataContext（必须在控件中创建封装弹出窗口的属性）。就这样，您将能够在没有事件的情况下管理打开或关闭的弹出窗口 更新 试试下一个： 1.主要Xaml：
<Window x:Class="PopupIsOpenDataBindingHelpAttempt.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:popupIsOpenDataBindingHelpAttempt="clr-namespace:PopupIsOpenDataBindingHelpAttempt"
xmlns:system="clr-namespace:System;assembly=mscorlib"
Title="MainWindow" Height="350" Width="525">
<Window.DataContext>
<popupIsOpenDataBindingHelpAttempt:DemoMainViewModel/>
</Window.DataContext>
<Window.Resources>
<DataTemplate x:Key="PopupInnerControlDataTemplateKey" DataType="{x:Type popupIsOpenDataBindingHelpAttempt:TaskBarDemoViewModel}">
<Grid Width="150" Height="85">
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Text="{Binding TextString}"
Margin="5" Foreground="Red"
Width="150" TextWrapping="WrapWithOverflow"
VerticalAlignment="Stretch" HorizontalAlignment="Stretch"/>
<Button Grid.Row="1" Content="Press to close" Command="{Binding PopupInnerButtonCommand}"
VerticalAlignment="Stretch" HorizontalAlignment="Stretch"/>
</Grid>
</DataTemplate>
<Image x:Key="ImageControl" Source="Pic/2015_10_16_Bing_en-US.jpg" IsHitTestVisible="False"/>
</Window.Resources>
<Grid Width="75" Height="75" HorizontalAlignment="Center" VerticalAlignment="Center">
<popupIsOpenDataBindingHelpAttempt:TaskBarIconProjectDemo
ButtonContentProperty="{StaticResource ImageControl}"
ButtonCommandProperty="{Binding ShowPopupCommand}"
PopupIsOpenProperty="{Binding IsPopupOpen, UpdateSourceTrigger=PropertyChanged}"
PopupInnerContentControlDataContext="{Binding TaskBarDemoViewModel, UpdateSourceTrigger=PropertyChanged}"
PopupInnerContentControlContentTemplate="{StaticResource PopupInnerControlDataTemplateKey}"/>
</Grid>
public class DemoMainViewModel:BaseObservableObject
{
private bool _isOpen;
private TaskBarDemoViewModel _taskBarDemoViewModel;
private ICommand _showPopupCommnad;
public DemoMainViewModel()
{
TaskBarDemoViewModel = new TaskBarDemoViewModel(ClosePopup, "Here you can put your content. Go for it...");
}
private void ClosePopup()
{
IsPopupOpen = false;
}
public bool IsPopupOpen
{
get { return _isOpen; }
set
{
_isOpen = value;
OnPropertyChanged();
}
}
public TaskBarDemoViewModel TaskBarDemoViewModel
{
get { return _taskBarDemoViewModel; }
set
{
_taskBarDemoViewModel = value;
OnPropertyChanged();
}
}
public ICommand ShowPopupCommand
{
get { return _showPopupCommnad ?? (_showPopupCommnad = new RelayCommand(ShowPopup)); }
}
private void ShowPopup()
{
IsPopupOpen = true;
}
}
public class TaskBarDemoViewModel:BaseObservableObject
{
private readonly Action _closePopupCommand;
private ICommand _command;
private string _textString;
public TaskBarDemoViewModel(Action closePopupCommand, string content)
{
_closePopupCommand = closePopupCommand;
TextString = content;
}
public ICommand PopupInnerButtonCommand
{
get { return _command ?? (_command = new RelayCommand(TargetMethod)); }
}
private void TargetMethod()
{
//add your logic here
if(_closePopupCommand == null) return;
_closePopupCommand();
}
public string TextString
{
get { return _textString; }
set
{
_textString = value;
OnPropertyChanged();
}
}
}
#FFD5E0EE
#FFEAF1F8
#FFF4C661
#FFF4C87
#FFD06D
#FFFF0DF
关于，下一个解决方案是什么；尝试使用Popup.IsOpen属性（，下面是使用示例）。直接或通过CusCtrl用户控件的DependencyProperty将其绑定到UC1 DataContext（必须在控件中创建封装弹出窗口的属性）。就这样，您将能够在没有事件的情况下管理打开或关闭的弹出窗口 更新 试试下一个： 1.主要Xaml：
<Window x:Class="PopupIsOpenDataBindingHelpAttempt.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:popupIsOpenDataBindingHelpAttempt="clr-namespace:PopupIsOpenDataBindingHelpAttempt"
xmlns:system="clr-namespace:System;assembly=mscorlib"
Title="MainWindow" Height="350" Width="525">
<Window.DataContext>
<popupIsOpenDataBindingHelpAttempt:DemoMainViewModel/>
</Window.DataContext>
<Window.Resources>
<DataTemplate x:Key="PopupInnerControlDataTemplateKey" DataType="{x:Type popupIsOpenDataBindingHelpAttempt:TaskBarDemoViewModel}">
<Grid Width="150" Height="85">
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Text="{Binding TextString}"
Margin="5" Foreground="Red"
Width="150" TextWrapping="WrapWithOverflow"
VerticalAlignment="Stretch" HorizontalAlignment="Stretch"/>
<Button Grid.Row="1" Content="Press to close" Command="{Binding PopupInnerButtonCommand}"
VerticalAlignment="Stretch" HorizontalAlignment="Stretch"/>
</Grid>
</DataTemplate>
<Image x:Key="ImageControl" Source="Pic/2015_10_16_Bing_en-US.jpg" IsHitTestVisible="False"/>
</Window.Resources>
<Grid Width="75" Height="75" HorizontalAlignment="Center" VerticalAlignment="Center">
<popupIsOpenDataBindingHelpAttempt:TaskBarIconProjectDemo
ButtonContentProperty="{StaticResource ImageControl}"
ButtonCommandProperty="{Binding ShowPopupCommand}"
PopupIsOpenProperty="{Binding IsPopupOpen, UpdateSourceTrigger=PropertyChanged}"
PopupInnerContentControlDataContext="{Binding TaskBarDemoViewModel, UpdateSourceTrigger=PropertyChanged}"
PopupInnerContentControlContentTemplate="{StaticResource PopupInnerControlDataTemplateKey}"/>
</Grid>
public class DemoMainViewModel:BaseObservableObject
{
private bool _isOpen;
private TaskBarDemoViewModel _taskBarDemoViewModel;
private ICommand _showPopupCommnad;
public DemoMainViewModel()
{
TaskBarDemoViewModel = new TaskBarDemoViewModel(ClosePopup, "Here you can put your content. Go for it...");
}
private void ClosePopup()
{
IsPopupOpen = false;
}
public bool IsPopupOpen
{
get { return _isOpen; }
set
{
_isOpen = value;
OnPropertyChanged();
}
}
public TaskBarDemoViewModel TaskBarDemoViewModel
{
get { return _taskBarDemoViewModel; }
set
{
_taskBarDemoViewModel = value;
OnPropertyChanged();
}
}
public ICommand ShowPopupCommand
{
get { return _showPopupCommnad ?? (_showPopupCommnad = new RelayCommand(ShowPopup)); }
}
private void ShowPopup()
{
IsPopupOpen = true;
}
}
public class TaskBarDemoViewModel:BaseObservableObject
{
private readonly Action _closePopupCommand;
private ICommand _command;
private string _textString;
public TaskBarDemoViewModel(Action closePopupCommand, string content)
{
_closePopupCommand = closePopupCommand;
TextString = content;
}
public ICommand PopupInnerButtonCommand
{
get { return _command ?? (_command = new RelayCommand(TargetMethod)); }
}
private void TargetMethod()
{
//add your logic here
if(_closePopupCommand == null) return;
_closePopupCommand();
}
public string TextString
{
get { return _textString; }
set
{
_textString = value;
OnPropertyChanged();
}
}
}
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#FFEAF1F8
#FFF4C661
#FFF4C87
#FFD06D
#FFFF0DF
<Color x:Key="ButtonLowerPartKey">#FFD5E0EE</Color>
<Color x:Key="ButtonUpperPartKey">#FFEAF1F8</Color>
<Color x:Key="PressedColorButtonLowerPartKey">#FFF4C661</Color>
<Color x:Key="PressedButtonUpperPartKey">#FFF4CC87</Color>
<Color x:Key="HooveredButtonLowerPartKey">#FFFFD06D</Color>
<Color x:Key="HooveredButtonUpperPartKey">#FFFFF0DF</Color>
<Style x:Key="SpecialButtonStyle" TargetType="Button" BasedOn="{StaticResource {x:Type Button}}">
<Setter Property="Padding" Value="5">
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid x:Name="Grid">
<Ellipse x:Name="ButtonControlBorder" Stroke="{TemplateBinding BorderBrush}"
StrokeThickness="{TemplateBinding BorderThickness}"
Width="{TemplateBinding Width}" Height="{TemplateBinding Height}">
<Ellipse.Fill>
<LinearGradientBrush x:Name="BrushKey" MappingMode="RelativeToBoundingBox" SpreadMethod="Repeat" StartPoint="0.5,0" EndPoint="0.5,1">
<LinearGradientBrush.GradientStops>
<GradientStop Offset="0.5" Color="{StaticResource ButtonUpperPartKey}" />
<GradientStop Offset="0.5" Color="{StaticResource ButtonUpperPartKey}" />
<GradientStop Offset="0.5" Color="{StaticResource ButtonLowerPartKey}" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Ellipse.Fill>
</Ellipse>
<Ellipse x:Name="Pressed" Width="{TemplateBinding Width}" Height="{TemplateBinding Height}" Opacity="0">
<Ellipse.Fill>
<LinearGradientBrush x:Name="PressedBrushKey" MappingMode="RelativeToBoundingBox" SpreadMethod="Repeat" StartPoint="0.5,0" EndPoint="0.5,1">
<LinearGradientBrush.GradientStops>
<GradientStop Offset="0.5" Color="{StaticResource PressedButtonUpperPartKey}" />
<GradientStop Offset="0.5" Color="{StaticResource PressedButtonUpperPartKey}" />
<GradientStop Offset="0.5" Color="{StaticResource PressedColorButtonLowerPartKey}" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Ellipse.Fill>
</Ellipse>
<Ellipse x:Name="InnerPressed"
Width="{Binding ElementName=Pressed, Path=Width}" Height="{Binding ElementName=Pressed, Path=Height}"
Stroke="DarkOrange" Opacity="0" StrokeThickness="1" SnapsToDevicePixels="True" Fill="Transparent"/>
<ContentPresenter Content="{TemplateBinding Button.Content}" HorizontalAlignment="Center" VerticalAlignment="Center">
<ContentPresenter.OpacityMask>
<VisualBrush Visual="{Binding ElementName=ButtonControlBorder}" />
</ContentPresenter.OpacityMask>
</ContentPresenter>
<Grid.Triggers>
<EventTrigger RoutedEvent="Mouse.MouseEnter">
<BeginStoryboard x:Name="MouseEnterStoryboard">
<Storyboard>
<ColorAnimation Storyboard.TargetName="BrushKey" Storyboard.TargetProperty="GradientStops[0].Color" From="{StaticResource ButtonUpperPartKey}" To="{StaticResource HooveredButtonUpperPartKey}" Duration="0:0:0.3" AutoReverse="False" />
<ColorAnimation Storyboard.TargetName="BrushKey" Storyboard.TargetProperty="GradientStops[2].Color" From="{StaticResource ButtonLowerPartKey}" To="{StaticResource HooveredButtonLowerPartKey}" Duration="0:0:0.3" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="Mouse.MouseLeave">
<BeginStoryboard>
<Storyboard>
<ColorAnimation Storyboard.TargetName="BrushKey" Storyboard.TargetProperty="GradientStops[0].Color" From="{StaticResource HooveredButtonUpperPartKey}" To="{StaticResource ButtonUpperPartKey}" Duration="0:0:1" AutoReverse="False" />
<ColorAnimation Storyboard.TargetName="BrushKey" Storyboard.TargetProperty="GradientStops[2].Color" From="{StaticResource HooveredButtonLowerPartKey}" To="{StaticResource ButtonLowerPartKey}" Duration="0:0:1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Grid.Triggers>
</Grid>
<ControlTemplate.Resources>
<Storyboard x:Key="MouseUpTimeLine">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="Pressed" Storyboard.TargetProperty="Opacity">
<SplineDoubleKeyFrame KeyTime="00:00:00.25" Value="0" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="MouseDownTimeLine">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="Pressed" Storyboard.TargetProperty="Opacity">
<SplineDoubleKeyFrame KeyTime="00:00:00.05" Value="0.8" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="InnerPressedMouseUpTimeLine">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="InnerPressed" Storyboard.TargetProperty="Opacity">
<SplineDoubleKeyFrame KeyTime="00:00:00.25" Value="0" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="InnerPressedMouseDownTimeLine">
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="InnerPressed" Storyboard.TargetProperty="Opacity">
<SplineDoubleKeyFrame KeyTime="00:00:00.05" Value="1" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</ControlTemplate.Resources>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" SourceName="Grid" Value="True">
<Setter Property="Stroke" TargetName="ButtonControlBorder">
<Setter.Value>
<SolidColorBrush Color="{StaticResource HooveredButtonLowerPartKey}">
</SolidColorBrush>
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="ButtonBase.IsPressed" Value="True">
<Trigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource MouseDownTimeLine}" />
<BeginStoryboard Storyboard="{StaticResource InnerPressedMouseDownTimeLine}">
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard Storyboard="{StaticResource MouseUpTimeLine}" />
<BeginStoryboard Storyboard="{StaticResource InnerPressedMouseUpTimeLine}">
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>