通过控制边框来移动图像

本文关键字：移动 图像 边框 控制 | 更新日期: 2023-09-27 18:16:24

嗨，我完全是新的WPF，我希望能够通过CS文件中的变量控制XAML中的任何边距值，我已经在stackoverflow上阅读了一些问题/答案，试图实现它，但它似乎不起作用。

这是我到目前为止所尝试的，但我无法让它工作，真的需要建议。

public partial class MainWindow : Window, INotifyPropertyChanged
{
   private Thickness _Margin = new Thickness(100, 20, 0, 0);
   public Thickness Margin
   {
       get { return _Margin; }
       set
       {
           _Margin = value;
           //Notify the binding that the value has changed.
           this.OnPropertyChanged("Margin");
       }
   }
    public MainWindow()
    {
        InitializeComponent();
        No.DataContext = _Margin;
    }
    protected void OnPropertyChanged(string strPropertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(strPropertyName));
    }
    public event PropertyChangedEventHandler PropertyChanged;
}
XAML: 

<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="350" Width="525">
<Grid Name="No">
    <Border BorderBrush="Silver" BorderThickness="1" Height="100" HorizontalAlignment="Left" Margin="{Binding _Margin}" Name="border1" VerticalAlignment="Top" Width="200" />
</Grid>
</Window>

通过控制边框来移动图像

您使用的属性名称"公共厚度边界"存在问题，它覆盖了窗口。属性，你应该重命名它。其次，您绑定的是成员值而不是属性值。

试试下面的代码(我添加了一个按钮来触发PropertyChanged事件，你应该用你想用的任何东西替换它):

public partial class MainWindow : Window, INotifyPropertyChanged
{
    private Thickness _margin = new Thickness(100, 20, 0, 0);
    public Thickness GridMargin
    {
        get { return _margin; }
        set
        {
            _margin = value;
            //Notify the binding that the value has changed.
            this.OnPropertyChanged("GridMargin");
        }
    }
    public MainWindow()
    {
        InitializeComponent();
        No.DataContext = this;
    }
    protected void OnPropertyChanged(string strPropertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(strPropertyName));
    }
    #region INotifyPropertyChanged Members
    public event PropertyChangedEventHandler PropertyChanged;
    #endregion
    private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
    {
        Random r = new Random();
        GridMargin = new Thickness(r.Next(0, 100));
    }
}
XAML: 

<Grid Name="No">
    <Border BorderBrush="Silver" BorderThickness="1" Height="100" HorizontalAlignment="Left" Margin="{Binding GridMargin}" Name="border1" VerticalAlignment="Top" Width="200" />
    <Button Content="Margin" HorizontalAlignment="Right" VerticalAlignment="Bottom" Click="ButtonBase_OnClick"></Button>
</Grid>

设置数据上下文的方式不一致。DataContext被设置为"MainWindow"的"_Margin"属性，但随后绑定也针对路径"_Margin"。你需要的是这个:

No.DataContext = this;
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