Question

如何将Visibility元素的Grid绑定到两个Checkbox元素。如果至少检查其中一个网格，我希望显示网格。 我不想使用转换器。

这就是我所拥有的：

  /// <summary>
  /// Identifies whether the tags will be copied from source to target host
  /// </summary>
  private bool pasteTags = true;
  public bool PasteTags
  {
     get { return pasteTags; }
     set
     {
        pasteTags = value;
        RaisePropertyChanged("PasteTags");
     }
  }


  /// <summary>
  /// Identifies whether the dimensions will be copied from source to target host
  /// </summary>
  private bool pasteDimensions = true;
  public bool PasteDimensions
  {
     get { return pasteDimensions; }
     set
     {
        pasteDimensions = value;
        RaisePropertyChanged("PasteDimensions");
     }
  }


  /// <summary>
  /// Identifies if the views data grid is displayed or not.
  /// </summary>      
  public System.Windows.Visibility IsViewGridVisible
  {
     get
     {
        if (pasteDimensions || pasteTags)
           return System.Windows.Visibility.Visible;

        return System.Windows.Visibility.Collapsed;
     }
  }

XAML：

<Grid Visibility="{Binding IsViewGridVisible}"> </Grid>

Answer 1

您唯一需要的是在RaisePropertyChanged("IsViewGridVisible");和PasteDimensions两个属性集中调用PasteTags。

public bool PasteDimensions
  {
     get { return pasteDimensions; }
     set
     {
        pasteDimensions = value;
        RaisePropertyChanged("PasteDimensions");
        RaisePropertyChanged("IsViewGridVisible");
     }
  }

这是必需的，因为IsViewGridVisible取决于这些属性的两个值，并且需要告知WPF有关更改（它无法以任何其他方式解决）。

Answer 2

您实际上并不需要IsViewGridVisible属性。

相反，您可以定义一个样式，在Visibility和MultiDataTrigger属性上按PasteTags设置网格的PasteDimensions：

<Grid>
    <Grid.Style>
        <Style TargetType="Grid">
            <Setter Property="Visibility" Value="Collapsed"/>
            <Style.Triggers>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding PasteTags}" Value="True"/>
                        <Condition Binding="{Binding PasteDimensions}" Value="True"/>
                    </MultiDataTrigger.Conditions>
                    <Setter Property="Visibility" Value="Visible"/>
                </MultiDataTrigger>
            </Style.Triggers>
        </Style>
    </Grid.Style>
</Grid>

如何绑定到WPF中的2个元素

2 个答案: