使用的DependencyProperty能见度绑定 [英] Visibility Binding using DependencyProperty
本文介绍了使用的DependencyProperty能见度绑定的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有以下一些简单的代码使用ToggleButton.IsChecked属性来设置TextBlock的可见性。它工作正常。由于这并不完全适合我的程序结构，我想另一个TextBlock的知名度绑定的本一个的DependencyProperty。它编译罚款，但它产生任何影响。我做错了什么，只是不知道是什么。
XAML
<窗口x：类=ToggleButtonTest.MainWindow
的xmlns =http://schemas.microsoft.com/winfx/2006/xaml/presentation
的xmlns：X =HTTP： //schemas.microsoft.com/winfx/2006/xaml
标题=主窗口WIDTH =200HEIGHT =100>
< Window.Resources>
< BooleanToVisibilityConverter X：键=BooleanToVisibilityConverter/>
< /Window.Resources>
<&StackPanel的GT;
<切换按钮X：NAME =切换按钮CONTENT =切换
=器isChecked真选中=toggleButton_Checked/>
< TextBlock的文本=一些文本
能见度={结合器isChecked，
的ElementName =切换按钮，
转换= {StaticResource的BooleanToVisibilityConverter}}/>
< TextBlock的文本=更多文本
能见度={结合ShowMoreText，
的ElementName =此，
转换= {StaticResource的BooleanToVisibilityConverter}}/>
< / StackPanel的>
< /窗GT;
C＃
使用System.Windows;
命名空间ToggleButtonTest
{
公共部分类主窗口：窗口
{
静态主窗口（）
{
FrameworkPropertyMetadata元=
新FrameworkPropertyMetadata（真，
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault）;
ShowMoreTextProperty =
DependencyProperty.Register（ShowMoreText，
typeof运算（布尔）的typeof（主窗口），元）;
}
公共主窗口（）
{
的InitializeComponent（）;
}
公共静态只读的DependencyProperty ShowMoreTextProperty;
公共BOOL ShowMoreText
{
得到
{
返回（布尔）的GetValue（ShowMoreTextProperty）;
}
组
{
的SetValue（ShowMoreTextProperty，值）;
}
}
私人无效toggleButton_Checked（对象发件人，RoutedEventArgs E）
{
ShowMoreText = toggleButton.IsChecked.Value;
}
}
}
编辑：
有过这个回答，我想我的张贴工作代码...
XAML
<窗口x：类=ToggleButtonTest.MainWindow
的xmlns =http://schemas.microsoft.com/winfx/2006/xaml /演示
的xmlns：X =http://schemas.microsoft.com/winfx/2006/xaml
标题=主窗口WIDTH =200HEIGHT =100
产品名称=thisWindow>
< Window.Resources>
< BooleanToVisibilityConverter X：键=BooleanToVisibilityConverter/>
< /Window.Resources>
<&StackPanel的GT;
<切换按钮X：NAME =切换按钮
含量=切换
=器isChecked{绑定路径= ShowMoreText，的ElementName = thisWindow}/>
< TextBlock的文本=更多文本
能见度={绑定路径= ShowMoreText，
的ElementName = thisWindow，
转换器= {StaticResource的BooleanToVisibilityConverter}}/>
< / StackPanel的>
< /窗GT;
C＃
使用System.Windows;
命名空间ToggleButtonTest
{
公共部分类主窗口：窗口
{
公共主窗口（）
{
的InitializeComponent（） ;
}
公共静态只读的DependencyProperty ShowMoreTextProperty =
DependencyProperty.Register（ShowMoreText的typeof（布尔），
typeof运算（主窗口），新FrameworkPropertyMetadata（真实的，
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault））;
公共BOOL ShowMoreText
{
得到
{
返回（布尔）的GetValue（ShowMoreTextProperty）;
}
组
{
的SetValue（ShowMoreTextProperty，值）;
}
}
}
}
解决方案
的ElementName 必须真正是一种元素名称。 这个不飞。幸运的是，你有类型的元素主窗口这里有一个 ShowMoreText 属性：根窗口元素。
输入窗口的名称，并用其作为的ElementName ，如下：
<窗口x：类=ToggleButtonTest.MainWindow
的xmlns =http://schemas.microsoft.com/winfx/2006/xaml/presentation
的xmlns：X =http://schemas.microsoft.com/winfx/2006/xaml
标题=主窗口WIDTH =200HEIGHT =100
X：NAME =thisWindow>
< Window.Resources>
< BooleanToVisibilityConverter X：键=BooleanToVisibilityConverter/>
< /Window.Resources>
<&StackPanel的GT;
<切换按钮X：NAME =切换按钮CONTENT =切换
=器isChecked真选中=toggleButton_Checked/>
< TextBlock的文本=一些文本
能见度={结合器isChecked，
的ElementName =切换按钮，
转换= {StaticResource的BooleanToVisibilityConverter}}/>
< TextBlock的文本=更多文本
能见度={结合ShowMoreText，
的ElementName = thisWindow，
转换= {StaticResource的BooleanToVisibilityConverter}}/>
< / StackPanel的>
< /窗GT;
请注意，您可以用做同样的的RelativeSource自，但我更喜欢上面的方法。
I've some simple code below that uses a ToggleButton.IsChecked property to set the Visibility of a TextBlock. It works fine. Since this doesn't quite fit in with my program's structure, I'm trying to bind the visibility of another TextBlock to a DependencyProperty of "this". It compiles fine, but it produces no effect. I'm doing something wrong, just not sure what.
XAML
<Window x:Class="ToggleButtonTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Width="200" Height="100">
<Window.Resources>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</Window.Resources>
<StackPanel>
<ToggleButton x:Name="toggleButton" Content="Toggle"
IsChecked="True" Checked="toggleButton_Checked"/>
<TextBlock Text="Some Text"
Visibility="{Binding IsChecked,
ElementName=toggleButton,
Converter={StaticResource BooleanToVisibilityConverter}}"/>
<TextBlock Text="More Text"
Visibility="{Binding ShowMoreText,
ElementName=this,
Converter={StaticResource BooleanToVisibilityConverter}}"/>
</StackPanel>
</Window>
C#
using System.Windows;
namespace ToggleButtonTest
{
public partial class MainWindow : Window
{
static MainWindow()
{
FrameworkPropertyMetadata meta =
new FrameworkPropertyMetadata(true,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault);
ShowMoreTextProperty =
DependencyProperty.Register("ShowMoreText",
typeof(bool), typeof(MainWindow), meta);
}
public MainWindow()
{
InitializeComponent();
}
public static readonly DependencyProperty ShowMoreTextProperty;
public bool ShowMoreText
{
get
{
return (bool)GetValue(ShowMoreTextProperty);
}
set
{
SetValue(ShowMoreTextProperty, value);
}
}
private void toggleButton_Checked(object sender, RoutedEventArgs e)
{
ShowMoreText = toggleButton.IsChecked.Value;
}
}
}
Edit:
Having had this answered, I want to post my working code...
XAML
<Window x:Class="ToggleButtonTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Width="200" Height="100"
Name="thisWindow">
<Window.Resources>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</Window.Resources>
<StackPanel>
<ToggleButton x:Name="toggleButton"
Content="Toggle"
IsChecked="{Binding Path=ShowMoreText, ElementName=thisWindow}"/>
<TextBlock Text="More Text"
Visibility="{Binding Path=ShowMoreText,
ElementName=thisWindow,
Converter={StaticResource BooleanToVisibilityConverter}}"/>
</StackPanel>
</Window>
C#
using System.Windows;
namespace ToggleButtonTest
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
public static readonly DependencyProperty ShowMoreTextProperty =
DependencyProperty.Register("ShowMoreText", typeof(bool),
typeof(MainWindow), new FrameworkPropertyMetadata(true,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));
public bool ShowMoreText
{
get
{
return (bool)GetValue(ShowMoreTextProperty);
}
set
{
SetValue(ShowMoreTextProperty, value);
}
}
}
}
解决方案
ElementName must really be an element name. this doesn't fly. Fortunately, you do have an element of type MainWindow here with a ShowMoreText property: the root Window element.
Give the Window a name and use that as ElementName, as below:
<Window x:Class="ToggleButtonTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Width="200" Height="100"
x:Name="thisWindow">
<Window.Resources>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</Window.Resources>
<StackPanel>
<ToggleButton x:Name="toggleButton" Content="Toggle"
IsChecked="True" Checked="toggleButton_Checked"/>
<TextBlock Text="Some Text"
Visibility="{Binding IsChecked,
ElementName=toggleButton,
Converter={StaticResource BooleanToVisibilityConverter}}"/>
<TextBlock Text="More Text"
Visibility="{Binding ShowMoreText,
ElementName=thisWindow,
Converter={StaticResource BooleanToVisibilityConverter}}"/>
</StackPanel>
</Window>
Note that you can do the same using RelativeSource Self, but I prefer the method above.
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