在這種情況下，我會創造一個附加屬性，如類型的Visibility並會在Style做出TemplateBinding，是這樣的：
<ControlTemplate TargetType="{x:Type TabItem}">
...
<Button Grid.Column="1"
x:Name="CloseButton"
Visibility="{TemplateBinding local:MyClass.ButtonVisibility}"
...
</Button>
併爲<ItemContainerStyle>TabItem會寫這個（或其他地方）：
<Style TargetType="TabItem" BasedOn="{StaticResource SubStudioTabItem}">
<Setter Property="local:MyClass.ButtonVisibility" Value="{Binding Path=Display, Converter={StaticResource BooleanToVisibiltyConverter}}"/>
</Style>
Edit:
我創建了一個實現此方法的項目。在該項目試圖遵循MVVM模式。該項目的結構：
開始按順序在文件夾AttachedProperties有一個附加屬性，它負責Button的外觀。
的ButtonVisibility.cs代碼：
using System;
using System.Windows;
public class ButtonVisibilityPro : DependencyObject
{
public static readonly DependencyProperty ButtonVisibilityProperty;
public static void SetButtonVisibility(DependencyObject DepObject, Visibility value)
{
DepObject.SetValue(ButtonVisibilityProperty, value);
}
public static Visibility GetButtonVisibility(DependencyObject DepObject)
{
return (Visibility)DepObject.GetValue(ButtonVisibilityProperty);
}
static ButtonVisibilityPro()
{
PropertyMetadata MyPropertyMetadata = new PropertyMetadata(Visibility.Collapsed);
ButtonVisibilityProperty = DependencyProperty.RegisterAttached("ButtonVisibility",
typeof(Visibility),
typeof(ButtonVisibilityPro),
MyPropertyMetadata);
}
}
數據模型是ButtonModel，其中所述布爾屬性是ButtonDisplay。該類繼承自ViewModelBase，該類實現INotifyPropertyChanged。
ButtonModel.cs
using System;
using ButtonVisibilityHelp.ViewModels;
namespace ButtonVisibilityHelp.Models
{
public class ButtonModel : ViewModelBase
{
private bool _buttonDisplay = false;
public bool ButtonDisplay
{
get
{
return _buttonDisplay;
}
set
{
_buttonDisplay = value;
NotifyPropertyChanged("ButtonDisplay");
}
}
}
}
ViewModelBase.cs
using System;
using System.ComponentModel;
namespace ButtonVisibilityHelp.ViewModels
{
public class ViewModelBase : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void NotifyPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
ButtonViewModel.cs
using System;
using System.Windows.Input;
using System.Windows;
using ButtonVisibilityHelp.Models;
using ButtonVisibilityHelp.Workers;
namespace ButtonVisibilityHelp.ViewModels
{
public class ButtonViewModel : ViewModelBase
{
private ButtonModel _buttonModel;
private ICommand _hideButtonCommand = null;
private ICommand _showButtonCommand = null;
public ButtonModel ButtonModel
{
get
{
return _buttonModel;
}
set
{
_buttonModel = value;
NotifyPropertyChanged("ButtonModel");
}
}
public ICommand HideButtonCommand
{
get
{
if (_hideButtonCommand == null)
{
_hideButtonCommand = new RelayCommand(param => this.HideButton(), null);
}
return _hideButtonCommand;
}
}
public ICommand ShowButtonCommand
{
get
{
if (_showButtonCommand == null)
{
_showButtonCommand = new RelayCommand(param => this.ShowButton(), null);
}
return _showButtonCommand;
}
}
public ButtonViewModel()
{
ButtonModel = new ButtonModel();
}
private void HideButton()
{
ButtonModel.ButtonDisplay = false;
}
private void ShowButton()
{
ButtonModel.ButtonDisplay = true;
}
}
}
RelayCommand.cs
using System;
using System.Windows.Input;
namespace ButtonVisibilityHelp.Workers
{
public class RelayCommand : ICommand
{
private readonly Action<object> _execute;
private readonly Predicate<object> _canExecute;
public RelayCommand(Action<object> execute) : this(execute, null)
{
}
public RelayCommand(Action<object> execute, Predicate<object> canExecute)
{
if (execute == null)
{
throw new ArgumentNullException("execute");
}
_execute = execute;
_canExecute = canExecute;
}
public bool CanExecute(object parameter)
{
return _canExecute == null ? true : _canExecute(parameter);
}
public event EventHandler CanExecuteChanged
{
add
{
CommandManager.RequerySuggested += value;
}
remove
{
CommandManager.RequerySuggested -= value;
}
}
public void Execute(object parameter)
{
_execute(parameter);
}
}
}
下面是一塊XAML代碼是在TabItem樣式：
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid Background="{TemplateBinding Background}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="20"/>
</Grid.ColumnDefinitions>
<Border Grid.Column="0" SnapsToDevicePixels="True" Name="Border" Margin="0,0,2,0" Padding="2" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="0">
<ContentPresenter Name="ContentSite"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
Margin="5,5,5,5"
VerticalAlignment="Center"
RecognizesAccessKey="True"
ContentSource="Header" />
</Border>
<!-- Here TemplateBinding for Visibility -->
<Button Name="CloseButton" Style="{StaticResource CloseButton}"
Visibility="{TemplateBinding AttachedProperties:ButtonVisibilityPro.ButtonVisibility}"
Grid.Column="1" Width="14" Height="14" HorizontalAlignment="Center" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="TabStripPlacement" Value="Bottom">
<Setter TargetName="Border" Property="CornerRadius" Value="0,0,0,0" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
XAML的MainWindow：
<Window x:Class="ButtonVisibilityHelp.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ViewModels="clr-namespace:ButtonVisibilityHelp.ViewModels"
xmlns:AttachedProperties="clr-namespace:ButtonVisibilityHelp.AttachedProperties"
WindowStartupLocation="CenterScreen"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<ViewModels:ButtonViewModel x:Key="MyButtonViewModel" />
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
</Window.Resources>
<Grid DataContext="{Binding Source={StaticResource MyButtonViewModel}}">
<TabControl>
<TabControl.ItemContainerStyle>
<Style TargetType="{x:Type TabItem}" BasedOn="{StaticResource {x:Type TabItem}}">
<Setter Property="AttachedProperties:ButtonVisibilityPro.ButtonVisibility" Value="{Binding Path=ButtonModel.ButtonDisplay, Converter={StaticResource BooleanToVisibilityConverter}}" />
</Style>
</TabControl.ItemContainerStyle>
<TabItem Header="Test1">
<StackPanel>
<TextBlock Text="{Binding ButtonModel.ButtonDisplay, StringFormat=ButtonDisplay: {0}, Mode=TwoWay}" HorizontalAlignment="Right" />
<Button Name="ShowInTest1" Command="{Binding ShowButtonCommand}" Width="100" Height="30" Content="Show me" HorizontalAlignment="Right" />
<Button Name="HideInTest1" Command="{Binding HideButtonCommand}" Width="100" Height="30" Content="Hide me" HorizontalAlignment="Right" />
</StackPanel>
</TabItem>
<TabItem Header="Test2">
<StackPanel>
<TextBlock Text="{Binding ButtonModel.ButtonDisplay, StringFormat=ButtonDisplay: {0}, Mode=TwoWay}" HorizontalAlignment="Right" />
<Button Name="ShowInTest2" Command="{Binding ShowButtonCommand}" Width="100" Height="30" Content="Show me" HorizontalAlignment="Right" />
<Button Name="HideInTest2" Command="{Binding HideButtonCommand}" Width="100" Height="30" Content="Hide me" HorizontalAlignment="Right" />
</StackPanel>
</TabItem>
</TabControl>
</Grid>
</Window>
Output
告訴我：
隱藏我：
完整的代碼示例可在此link。
我有困難這個例子。你能讓它更完整嗎？ – MoonKnight
@ Killercam：是的，就像時間一樣，我會做的。我很抱歉，那立刻沒有提供完整的代碼。 –
非常感謝您的時間... – MoonKnight