在WPF中重用Bindings的任何方法？

Question

我在WPF应用程序中已经到了这一点,我的控件上的所有绑定都变得非常重复,而且有点过于冗长.此外,如果我想更改此绑定,我将不得不在各个地方而不是一个地方更改它.

是否有任何方法可以在资源中编写绑定的源部分,然后通过使用更紧凑的语法引用它来重用它.我四处寻找这些功能,但我还没找到.

我现在在做什么

<StackPanel>
    <ToggleButton x:Name="someToggleButton" />
    <Button Visibility="{Binding ElementName=someToggleButton, Path=IsChecked, Converter={StaticResource BoolToVisibilityConverter}}" />
    <Grid Visibility="{Binding ElementName=someToggleButton, Path=IsChecked, Converter={StaticResource BoolToVisibilityConverter}}" />
    <TextBox Visibility="{Binding ElementName=someToggleButton, Path=IsChecked, Converter={StaticResource BoolToVisibilityConverter}}" />
    <CheckBox Visibility="{Binding ElementName=someToggleButton, Path=IsChecked, Converter={StaticResource BoolToVisibilityConverter}}" />
</StackPanel>

我想做什么(伪代码)

<StackPanel>
    <StackPanel.Resources>
        <Variable x:Name="someToggleButtonIsChecked" 
                  Type="{x:Type Visibility}"  
                  Value="{Binding ElementName=someToggleButton, Path=IsChecked, Converter={StaticResource BoolToVisibilityConverter}}" />
    </StackPanel.Resources>

    <ToggleButton x:Name="someToggleButton" />
    <Button Visibility="{VariableBinding someToggleButtonIsChecked}" />
    <Grid Visibility="{VariableBinding someToggleButtonIsChecked}" />
    <TextBox Visibility="{VariableBinding someToggleButtonIsChecked}" />
    <CheckBox Visibility="{VariableBinding someToggleButtonIsChecked}" />
</StackPanel>

是否有类似的类似功能或技术允许我声明绑定源一次然后重用它？

Answer 1

您可以将someToggleButton的IsChecked属性绑定到视图模型（DataContext）上的属性并使用它。它看起来像这样：

<StackPanel>  
<ToggleButton x:Name="someToggleButton" IsChecked="{Binding ToggleVisibility, Mode=TwoWay, Converter={StaticResource BoolToVisibilityConverter}}"   /> 
<Button Visibility="{Binding ToggleVisibility}" /> 
<Grid Visibility="{Binding ToggleVisibility}" /> 
<TextBox Visibility="{Binding ToggleVisibility}" /> 
<CheckBox Visibility="{Binding ToggleVisibility}" /> 
</StackPanel> 

这需要您的Window具有名为of 类型的DataContext属性ToggleVisibilityVisibility。

编辑：

为了进一步说明，您的视图模型可能如下所示：

public class SomeViewModel : INotifyPropertyChanged
{

    private Visibility toggleVisibility;

    public SomeViewModel()
    {
        this.toggleVisibility = Visibility.Visible;
    }

    public Visibility ToggleVisibility
    {
        get
        {
            return this.toggleVisibility;
        }
        set
        {
            this.toggleVisibility = value;
            RaisePropertyChanged("ToggleVisibility");
        }
    }

    private void RaisePropertyChanged(string propertyName)
    {
        if (this.PropertyChanged != null)
            this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }

    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;

    #endregion
}

然后你可以将它的一个实例设置为DataContexton theWindow甚至只是 on theStackPanel