我最近试图制作一个使用我的UserControls填充的网格。
我遇到的唯一问题是,我无法使用WPF绑定(bind)的东西将用户控件链接到我的网格,这使我很难将它们很好地放置在网格中。
我的问题:如何将ViewModel中的属性(存储在ViewModel拥有对象的Block类中)绑定(bind)到UserControl Block,允许它使用这些变量(X和Y,即网格的行和列,位置)?
这是我的用户控件的代码:
namespace Mortal_Pets.Views
public partial class BlockView : UserControl
{
public BlockView()
{
InitializeComponent();
DataContext = new BlockViewModel();
}
}
<UserControl x:Class="Mortal_Pets.Views.BlockView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="30" d:DesignWidth="30">
<Canvas Background="{Binding Block.Color}" Grid.Row="{Binding Path=Block.XPosition}" Grid.Column="{Binding Path=Block.YPosition}">
</Canvas>
这是UserControl的ViewModel和Model类:
class BlockViewModel
{
public Block Block { get; set; }
public BlockViewModel()
{
Block = new Block();
Block.XPosition = 5; //Does Not Work, But this is how i'd like to have it
Block.YPosition = 5; //Does Not Work, But this is how i'd like to have it
Block.Color = new SolidColorBrush(Colors.Black);
}
}
class Block
{
public int XPosition { get; set; }
public int YPosition { get; set; }
public Brush Color { get; set; }
public Block()
{
}
}
然后跟进我们的窗口:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = new MainViewModel();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
BlockView view = new BlockView();
view.SetValue(Grid.ColumnProperty, 5); //This does work, but is ugly and not really usefull for what i intend to do with it
view.SetValue(Grid.RowProperty, 5); //This does work, but is ugly and not really usefull for what i intend to do with it
BoardGrid.Children.Add(view); //This does work, but is ugly and not really usefull for what i intend to do with it
}
}
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Mortal_Pets.Views" x:Class="Mortal_Pets.Views.MainWindow"
Title="MainWindow" Height="700" Width="600"
Loaded="Window_Loaded">
<Grid x:Name="BoardGrid" Margin="10,50,10,10" Width="500" Height="500">
<Grid.RowDefinitions>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
</Grid.ColumnDefinitions>
<Label x:Name="ComboCounter" Content="{Binding Game.ComboCounter}" HorizontalAlignment="Left" Margin="-2,-61,0,0" VerticalAlignment="Top" Width="95" Grid.ColumnSpan="4"/>
</Grid>
提前致谢,
尼克·范德·迈伊
最佳答案
根据发现的here和here使其工作。它不是很漂亮,但这似乎是它将起作用的唯一方法。
您没有共享MainViewModel
(我想是因为您提供的快速示例没有必要)。但是由于我需要它进行绑定(bind),并且您很可能会使用它,因此这里是我的快速版本:
class MainViewModel
{
public List<BlockViewModel> Blocks { get; set; }
public MainViewModel()
{
Blocks = new List<BlockViewModel> { new BlockViewModel() };
}
}
您需要将网格包裹在
ItemsControl
中,并使用ItemContainerStyle
绑定(bind)Grid.Column
和Grid.Row
:<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="700" Width="600"
xmlns:local="clr-namespace:WpfApplication1">
<ItemsControl ItemsSource="{Binding Path=Blocks}">
<ItemsControl.ItemContainerStyle>
<Style>
<Setter Property="Grid.Row" Value="{Binding Block.YPosition}" />
<Setter Property="Grid.Column" Value="{Binding Block.XPosition}" />
</Style>
</ItemsControl.ItemContainerStyle>
<ItemsControl.ItemTemplate>
<DataTemplate>
<local:BlockView/>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid Margin="10,50,10,10" Width="500" Height="500" ShowGridLines="True">
<Grid.RowDefinitions>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
<RowDefinition Height="25"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
<ColumnDefinition Width="25"/>
</Grid.ColumnDefinitions>
</Grid>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</Window>
BlockView
现在看起来像这样:<UserControl x:Class="WpfApplication1.BlockView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d" d:DesignHeight="30" d:DesignWidth="30">
<Canvas Background="{Binding Block.Color}">
</Canvas>
</UserControl>