本学期我一直在大学学习WPF,但仍有一些我不太了解的事情。我有以下代码:
$KCODE
和
<UserControl x:Class="Reversi.SquareControl"
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="48" d:DesignWidth="48">
<Button Command="{Binding Place}" CommandParameter="{Binding ????????}">
...
</Button>
我的问题是:我在 public partial class SquareControl : UserControl
{
public SquareControl(int x, int y)
{
InitializeComponent();
Coordinates = new Vector2D(x, y);
}
public Vector2D Coordinates
{
get { return (Vector2D) GetValue(CoordinateProperty); }
set { SetValue(CoordinateProperty, value); }
}
...
public static readonly DependencyProperty CoordinateProperty =
DependencyProperty.Register("Coordinates", typeof(Vector2D), typeof(SquareControl), new PropertyMetadata(new Vector2D(0, 0)));
}
绑定中如何将CommandParameter
传递给我的ViewModel中的ICommand?
答案 0 :(得分:2)
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mine="clr-namespace:WpfApplication2"
Title="MainWindow" Height="350" Width="525">
<Grid>
<mine:SquareControl Coordinates="{Binding VMCoordinates, Mode=TwoWay}"/>
</Grid>
</Window>
在这种情况下,命名空间&#39; mine&#39;是您的应用程序的命名空间。因此,在主窗口中,网格内的线条显示&#34;在我的视图中放置一个SquareControl实例,并将其名为Coordinates的DP绑定到VM上名为VMCoordinates&#34;
的属性&#39; Mode = TwoWay&#39;表示如果视图(用户)或VM更改数据,则将其传递给另一个。