blocks|key|996048|text|您需要在按钮上将ToolTipService.ShowOnDisabled设置为True，以便在禁用按钮时工具提示可见。您可以在按钮上绑定ToolTipService.IsEnabled以启用和禁用工具提示。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|996049|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.controls.tooltipservice.showondisabled.aspx|1|http://msdn.microsoft.com/en-us/library/system.windows.controls.tooltipservice.isenabled.aspx^0|8|T|0|1X|O|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

<p>You will need to set <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.tooltipservice.showondisabled.aspx" rel="noreferrer">ToolTipService.ShowOnDisabled</a> to True on the Button in order to have the Tooltip visible at all when the Button is disabled.  You can bind <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.tooltipservice.isenabled.aspx" rel="noreferrer">ToolTipService.IsEnabled</a> on the Button to enable and disable the Tooltip.  </p>


blocks|key|996107|text|这是Button的完整XAML+(基于@Quartermeister的回答)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|996108|<Button+
++x:Name="btnAdd"+
++Content="Add"+
++ToolTipService.ShowOnDisabled="True"+
++ToolTipService.IsEnabled="{Binding+ElementName=btnAdd,+Path=IsEnabled,+Converter={StaticResource+boolToOppositeBoolConverter}}"+
++ToolTip="Appointments+cannot+be+added+whilst+the+event+has+outstanding+changes."/>|code-block|syntax|javascript|996109|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>This is the full XAML of the Button (based on the answer of @Quartermeister)</p>

<pre><code>&lt;Button 
  x:Name="btnAdd" 
  Content="Add" 
  ToolTipService.ShowOnDisabled="True" 
  ToolTipService.IsEnabled="{Binding ElementName=btnAdd, Path=IsEnabled, Converter={StaticResource boolToOppositeBoolConverter}}" 
  ToolTip="Appointments cannot be added whilst the event has outstanding changes."/&gt;
</code></pre>


blocks|key|996172|text|对大卫·沃德提出的答案进行了略微修改。下面是完整的代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|996173|向资源添加一个值转换器，如下所示|996174|<Window.Resources>
++++<Converters:NegateConverter+x:Key="negateConverter"/>
</Window.Resources>|code-block|syntax|javascript|996175|然后定义以下xaml|996176|<Button+
++x:Name="btnAdd"+
++Content="Add"+
++ToolTipService.ShowOnDisabled="True"+
++ToolTipService.IsEnabled="{Binding+RelativeSource={RelativeSource+self},+Path=IsEnabled,+Converter={StaticResource+negateConverter}}"+
++ToolTip="Hi+guys+this+is+the+tool+tip"/>|996177|值转换器如下所示|996178|[ValueConversion(typeof(bool),+typeof(bool))]
++public+class+NegateConverter+:+IValueConverter
++{
++++public+object+Convert(object+value,+Type+targetType,+object+parameter,+System.Globalization.CultureInfo+culture)
++++{
+++++return++!((bool)value);
++++}

++++public+object+ConvertBack(object+value,+Type+targetType,+object+parameter,+System.Globalization.CultureInfo+culture)
++++{
++++++throw+new+NotImplementedException();
++++}
++}|996179|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

<p>A slightly modified answer for what David Ward has proposed. Here is the full code</p>

<p>Add a value converter to resouces like this</p>

<pre><code>&lt;Window.Resources&gt;
    &lt;Converters:NegateConverter x:Key="negateConverter"/&gt;
&lt;/Window.Resources&gt;
</code></pre>

<p>Then define following xaml</p>

<pre><code>&lt;Button 
  x:Name="btnAdd" 
  Content="Add" 
  ToolTipService.ShowOnDisabled="True" 
  ToolTipService.IsEnabled="{Binding RelativeSource={RelativeSource self}, Path=IsEnabled, Converter={StaticResource negateConverter}}" 
  ToolTip="Hi guys this is the tool tip"/&gt;
</code></pre>

<p>The value converter looks like this</p>

<pre><code>[ValueConversion(typeof(bool), typeof(bool))]
  public class NegateConverter : IValueConverter
  {
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
     return  !((bool)value);
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
      throw new NotImplementedException();
    }
  }
</code></pre>


blocks|key|996281|text|您也可以使用简单的触发器来完成此操作。只需将以下代码段放入窗口即可。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|996282|<StackPanel+Orientation="Vertical"+HorizontalAlignment="Center"+VerticalAlignment="Center">
++++<CheckBox+Name="chkDisabler"+Content="Enable+/+disable+button"+Margin="10"+/>
++++<Button+Content="Hit+me"+Width="200"+Height="100"+IsEnabled="{Binding+ElementName=chkDisabler,+Path=IsChecked}">
++++++++<Button.Style>
++++++++++++<Style+TargetType="{x:Type+Button}">
++++++++++++++++<Setter+Property="ToolTipService.ShowOnDisabled"+Value="true"+/>
++++++++++++++++<Setter+Property="ToolTip"+Value="{x:Null}"+/>
++++++++++++++++<Style.Triggers>
++++++++++++++++++++<Trigger+Property="IsEnabled"+Value="False">
++++++++++++++++++++++++<Setter+Property="ToolTip"+Value="Hi,+there!+I'm+disabled!"+/>
++++++++++++++++++++</Trigger>
++++++++++++++++</Style.Triggers>
++++++++++++</Style>
++++++++</Button.Style>
++++</Button>
</StackPanel>|code-block|syntax|javascript|996283|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>You can do it using a simple trigger also. Just place the following piece of code into a Window.</p>

<pre><code>&lt;StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center"&gt;
    &lt;CheckBox Name="chkDisabler" Content="Enable / disable button" Margin="10" /&gt;
    &lt;Button Content="Hit me" Width="200" Height="100" IsEnabled="{Binding ElementName=chkDisabler, Path=IsChecked}"&gt;
        &lt;Button.Style&gt;
            &lt;Style TargetType="{x:Type Button}"&gt;
                &lt;Setter Property="ToolTipService.ShowOnDisabled" Value="true" /&gt;
                &lt;Setter Property="ToolTip" Value="{x:Null}" /&gt;
                &lt;Style.Triggers&gt;
                    &lt;Trigger Property="IsEnabled" Value="False"&gt;
                        &lt;Setter Property="ToolTip" Value="Hi, there! I'm disabled!" /&gt;
                    &lt;/Trigger&gt;
                &lt;/Style.Triggers&gt;
            &lt;/Style&gt;
        &lt;/Button.Style&gt;
    &lt;/Button&gt;
&lt;/StackPanel&gt;
</code></pre>


<p>How can I ensure that a button's Tooltip is only visible when the button is disabled?</p>

<p>What can I bind the tooltip's visibility to?</p>


WPF Tooltip Visibility

如何确保按钮的工具提示仅在按钮被禁用时可见？我可以将工具提示的可见性绑定到什么？

问WPF工具提示可见性
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