最近我一直在尝试制作一个网格，使用我的 UserControls 来填充它。 我遇到的唯一问题是我无法使用 WPF 绑定(bind)将用户控件链接到我的网格，这让我很难将它们很好地放置在网格中。 我的问题:如何将我的 ViewModel 中的属性(存储在 Block 类中，我的 ViewModel 有一个对象)绑定(bind)到我的 UserControl Block，允许它使用这些变量(X 和 Y，它们是网格的行和列，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()
{
}
}
然后我们有我的窗口:
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·范德梅杰
最佳答案
根据发现的知识让它工作 here和 here .它并不漂亮，但这似乎是唯一可行的方法。
您没有共享 MainViewModel(我猜是因为您提供的快速示例没有必要)。但是由于我需要它来进行绑定(bind)并且您很可能会使用它，所以这是我的快速版本:
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>
关于c# - WPF 和 MVVM : How use attached properties in my UserControl，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18980848/