Difference between Label and TextBlock
According to the Windows Applications Development with Microsoft .NET 4 70-511 Training 开发者_运维知识库Kit
What is the difference between the Label
control and TextBlock
control since both are content controls and just displaying text?
TextBlock is not a control
Even though TextBlock
lives in the System.Windows.Controls namespace, it is not a control. It derives directly from FrameworkElement
. Label, on the other hand, derives from ContentControl
. This means that Label
can:
- Be given a custom control template (via the
Template
property). - Display data other than just a string (via the
Content
property). - Apply a
DataTemplate
to its content (via theContentTemplate
property). Do whatever else a
ContentControl
can do that aFrameworkElement
cannot.Label
text is grayed out when disabledLabel
supports access keysLabel
is much heavier thanTextBlock
Source
Some more interesting reads below
- http://www.wpfwiki.com/WPF%20Q4.1.ashx
- What is the difference between the WPF TextBlock element and Label control?
Labels usually support single line text output while the TextBlock is intended for multiline text display.
For example in wpf TextBlock has a property TextWrapping
which enables multiline input; Label does not have this.
Label
is ContentControl
which means that you can set anything as a content for it. Absolutely anything including strings, numbers, dates, other controls, images, shapes, etc. TextBlock
can handle only strings
.
Although TextBlock and Label are both used to display text, they are quite different under the covers.
=> Label inherits from ContentControl, a base class that enables the display of almost any UI imaginable.
=> TextBlock, on the other hand, inherits directly from FrameworkElement, thus missing out on the behavior that is common to all elements inheriting from Control. The shallow inheritance hierarchy of TextBlock makes the control lighter weight than Label and better suited for simpler, noninteractive scenarios.
PS: However, if you want access keys to work or want a more flexible or graphical design, you’ll need to use Label.
Probably the most annoying feature of TextBlock
is the implicit style lookup behavior, which is scoped to only to the closest DataTemplate
. This is a default behavior for non Control
xaml elements.
<StackPanel Orientation="Vertical">
<StackPanel.Resources>
<Style TargetType="TextBlock">
<Setter Property="Foreground" Value="Red"/>
</Style>
<Style TargetType="Label">
<Setter Property="Foreground" Value="Red"/>
</Style>
</StackPanel.Resources>
<ContentControl Content="Test">
<ContentControl.ContentTemplate>
<DataTemplate>
<TextBlock Text="{Binding}"/>
</DataTemplate>
</ContentControl.ContentTemplate>
</ContentControl>
<ContentControl Content="Test">
<ContentControl.ContentTemplate>
<DataTemplate>
<Label Content="{Binding}"/>
</DataTemplate>
</ContentControl.ContentTemplate>
</ContentControl>
</StackPanel>
Yields a result of:
You can read more about it here.
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