WPF - MVVM Light, how to bind/set Content of a ContentControl
I'm fairly new to WPF, and I want to create an MVVM based application that use a main window as the shell, have some menu items and when I click those, the Content
property of a ContentControl
changes.
I added MVVM Light via Nuget, and I now have a ViewModel
folder with a ViewModelLocator
and the MainViewModel
.
My MainWindow.xaml looks like this:
<Window
x:Class="WpfMvvmApp.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="470" Width="900" IsTabStop="False" AllowsTransparency="True" Background="{x:Null}" BorderBrush="#FF3F3F3F" PreviewMouseMove="HandlePreviewMouseMove"
SnapsToDevicePixels="True" TextOptions.TextFormattingMode="Display" TextOptions.TextRenderingMode="ClearType" ResizeMode="NoResize" WindowStyle="None" WindowStartupLocation="CenterOwner"
DataContext="{Binding Main, Source={StaticResource Locator}}">
<Grid>
<Border x:Name="m_edgeBorder" x:FieldModifier="private" Margin="10" Background="White" IsHitTestVisible="False" IsEnabled="False">
<Border.Effect>
<DropShadowEffect Opacity="0.999" BlurRadius="16" ShadowDepth="0" />
</Border.Effect>
</Border>
<Grid x:Name="m_contentGrid" x:FieldModifier="private" Background="White" Margin="13">
<Rectangle Height="28" VerticalAlignment="Top" Fill="White" PreviewMouseDown="HandleHeaderPreviewMouseDown" />
<Button HorizontalAlignment="Right" Margin="500,6,8,0" VerticalAlignment="To开发者_如何学JAVAp" Style="{StaticResource ChromeButtonStyle}" Click="HandleCloseClick">
<TextBlock TextWrapping="Wrap" Text="r" FontFamily="Webdings" Foreground="#FF919191" FontSize="13.333" />
</Button>
</Grid>
<ContentControl x:Name="ActiveItem" Content="{Binding CurrentViewModel , Mode=OneWay}" Background="Transparent" HorizontalAlignment="Stretch" IsTabStop="False" Focusable="False" HorizontalContentAlignment="Center"
VerticalContentAlignment="Center" VerticalAlignment="Bottom" Margin="13,0,12,13" MaxHeight="375" />
</Grid>
</Window>
Say I have a NetworkView.xaml file, and its view model called NetworkViewModel.
What is the intended use of MVVM Light, to bind the Content
property of the ContentControl
? I assume you have to set the CurrentViewModel
property of the MainViewModel
class, but I don't know how the wiring to the view happens, or how I can control it.
Can someone give an example?
You have it correct, the only thing I see missing is a DataTemplate telling the application how to display a NetworkViewModel.
<DataTemplate DataType="{x:Type local:NetworkViewModel}">
<local:NetworkView />
</DataTemplate>
This would tell WPF that whenever it tries to display a NetworkViewModel
, it should use the NetworkView
control
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