Xaml MVVM将cutom属性绑定到视图模型
我是MVVVM的新手,所以如果这是一个愚蠢的问题,请原谅我。我正在使用这个例子,并包括在那个里的图书馆,以获得由用户指示的图像像素的颜色。它看起来很漂亮,并以矩形选定颜色显示,但我需要将selecteed值绑定到viewmodel 以下是我的xaml代码:Xaml MVVM将cutom属性绑定到视图模型,xaml,mvvm,dependency-properties,Xaml,Mvvm,Dependency Properties,我是MVVVM的新手,所以如果这是一个愚蠢的问题,请原谅我。我正在使用这个例子,并包括在那个里的图书馆,以获得由用户指示的图像像素的颜色。它看起来很漂亮,并以矩形选定颜色显示,但我需要将selecteed值绑定到viewmodel 以下是我的xaml代码: <Window x:Class="MovieEditor.View.PixelSelector" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentat
<Window x:Class="MovieEditor.View.PixelSelector"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ctrls="clr-namespace:ColorPickerControls;assembly=ColorPickerControls"
xmlns:local="clr-namespace:MovieEditor.MVVMCommon"
Title="FilterDesigner" Height="550" Width="550"
Icon="..\Resources\Images\icon.ico"
xmlns:VM="clr-namespace:MovieEditor.ViewModel">
<Window.DataContext>
<VM:PixelSelectorVM/>
</Window.DataContext>
<Window.Resources>
<local:ColorToBrushConverter x:Key="ColorToBrushConverter"/>
</Window.Resources>
<Grid Background="#FF191919" >
<DockPanel>
<Grid Margin="10,10,10,1">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="Auto" MinHeight="38"/>
</Grid.RowDefinitions>
<Border BorderBrush="White" BorderThickness="5" Margin="0,39,0,11">
<ctrls:ImageColorPicker Binding.XmlNamespaceManager="{Binding p PixelSelectorVM.MyImageColorPicker, UpdateSourceTrigger=PropertyChanged}"
x:Name="image" Source ="{Binding Frame}" Margin="0,36,0,0"
/>
</Border>
<Border Width="77"
HorizontalAlignment="Center"
BorderBrush="White" BorderThickness="1" Margin="263,2,182,435">
<Rectangle Fill="{Binding ElementName=image, Path=SelectedColor,
Converter={StaticResource ColorToBrushConverter}}" RenderTransformOrigin="0.549,0.429" Margin="1"/>
</Border>
<Button Content="Save" Command="{Binding Save}" Margin="165,0,0,4" Grid.Row="1" HorizontalAlignment="Left" Width="60"/>
<Label Content="Selected pixel color:" HorizontalAlignment="Left" Height="18" Margin="140,11,0,0" VerticalAlignment="Top" Width="110"/>
<Button Content="Cancel" Command="{Binding Cancel}" Margin="0,1,165,4" HorizontalAlignment="Right" Width="60" RenderTransformOrigin="0.5,0.5" Grid.Row="1">
</Button>
</Grid>
</DockPanel>
</Grid>
</Window>
</code>
请向我建议解决方案如何将所选颜色传递到视图模型您应该能够将ImageColorPicker的SelectedColor绑定到ViewModel的属性 因此,在XAML中添加绑定:
SelectedColor="{Binding MySelectedColor, Mode=TwoWay}"
并在VM中添加MySelectedColor属性:
private Color selectedColor;
public Color MySelectedColor
{
get
{
return this.selectedColor;
}
set
{
this.selectedColor = value;
OnPropertyChanged("MySelectedColor");
}
}
当控件的SelectedColor更改时,它应该自动更新VM中的MySelectedColor。这并不容易,因为SelectedColor是一个只读的依赖属性
private Color selectedColor;
public Color MySelectedColor
{
get
{
return this.selectedColor;
}
set
{
this.selectedColor = value;
OnPropertyChanged("MySelectedColor");
}
}