Wpf Textbox Scroll
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How to Add Scrollbars to a WPF TextBox
A WPF TextBox is a user interface element that allows users to enter and edit text. Sometimes, the text may be too long to fit in the available space of the TextBox, and you may want to add scrollbars to allow users to scroll through the text. In this article, we will show you how to add horizontal and vertical scrollbars to a WPF TextBox using XAML.
The HorizontalScrollBarVisibility and VerticalScrollBarVisibility properties are used to set horizontal and vertical scroll bars of a TextBox, which is of type ScrollBarVisibility enumeration[^2^]. The ScrollBarVisibility enumeration has four values â Disabled, Auto, Hidden, and Visible. The default value for both properties is Hidden, which means that the scrollbars are not visible unless the text exceeds the visible area of the TextBox.
To add scrollbars to a WPF TextBox, you can set the HorizontalScrollBarVisibility and VerticalScrollBarVisibility properties to Auto or Visible in XAML. For example:
<TextBox Name=\"TextBox\"
Width=\"300\" Height=\"150\"
HorizontalScrollBarVisibility=\"Visible\"
VerticalScrollBarVisibility=\"Visible\"
TextWrapping=\"Wrap\" >
</TextBox>
This will create a TextBox with both horizontal and vertical scrollbars that are always visible, regardless of the text length. The TextWrapping property is set to Wrap, which means that the text will wrap to the next line when it reaches the edge of the TextBox.
If you want the scrollbars to appear only when needed, you can set the HorizontalScrollBarVisibility and VerticalScrollBarVisibility properties to Auto instead of Visible. For example:
<TextBox Name=\"TextBox\"
Width=\"300\" Height=\"150\"
HorizontalScrollBarVisibility=\"Auto\"
VerticalScrollBarVisibility=\"Auto\"
TextWrapping=\"Wrap\" >
</TextBox>
This will create a TextBox with both horizontal and vertical scrollbars that are automatically shown or hidden depending on the text length. The TextWrapping property is still set to Wrap.
If you want to make the TextBox behave like a console window, where the new lines are added at the bottom and the text automatically scrolls to the end, you can use a custom style that flips the ScrollViewer and the TextBox vertically[^1^]. For example:
<Style x:Key=\"ConsoleTextBox\" TargetType=\"{x:Type TextBox}\">
<Setter Property=\"IsReadOnly\" Value=\"True\"/>
<Setter Property=\"Template\">
<Setter.Value>
<ControlTemplate TargetType=\"TextBox\">
<ScrollViewer RenderTransformOrigin=\"0.5,0.5\" VerticalScrollBarVisibility=\"Auto\">
<ScrollViewer.RenderTransform>
<ScaleTransform ScaleY=\"-1\"/>
</ScrollViewer.RenderTransform>
<TextBox Text=\"{TemplateBinding Text}\" RenderTransformOrigin=\"0.5,0.5\">
<TextBox.RenderTransform>
<ScaleTransform ScaleY=\"-1\"/>
</TextBox.RenderTransform>
</TextBox>
</ScrollViewer>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
This style can be included in your App.xaml or via ResourceDictionary and set as the Style of the TextBox. For example:
<TextBox Style=\"{StaticResource ConsoleTextBox}\"/>
This will create a TextBox with a vertical scrollbar that is automatically shown or hidden depending on the text length. The text will be added at the bottom and scrolled to the end automatically. However, this style has some drawbacks, such as inverted mouse scrolling and no line breaks when copying the text.
In conclusion, adding scrollbars to a WPF TextBox is easy using XAML. You can use the HorizontalScrollBarVisibility and VerticalScrollBarVisibility properties to control the visibility of the scrollbars, and use a custom style to make the TextBox behave like aa16f39245