I have a WPF page with quite a few objects. At the bottom of all these items, I have a label that needs to have textwrapping in the content. That answer is simple, with the use of a Textblock this should be a cinch. However, even though I use those items, I still can't get th e text to wrap. So I'm assuming that there must be other settings in the other objects that I need to check/modify. In pseudo code, my XAML looks like
<Page>
<Stackpanel vertical>
<Border>
<Stackpanel vertical>
<label></label>
<Stackpanel horizontal>
<label></label>
</stackpanel>
<label>
<textblock TextWrapping="Wrap">
</label>
</border>
</stackpanel>
</page>
What am I missing here? Should I be checking other elements? I have already made sure that none of the nesting elements have any height specified - they are all set to auto.
I'm going to go ahead and post this as an answer in case someone else gets stuck on this.
When you set the Width and Height properties of the TextBlock control, it will first horizontally increase in size to accommodate as much text as it can before wrapping the text (if the TextWrapping property is set to Wrap). Once it decides it needs to wrap the text, if the Height is set to Auto, the text box will resize vertically to accommodate the text (until it hits the bottom of whatever UI container you put it in). If you do not want the text box to resize past a certain point, you will need to set values for the MaxWidth and MaxHeight properties. This will force the TextBlock to wrap at a certain width.
With my XamlPadX, this wraps:
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="300">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Vertical">
<Label>L1</Label>
<StackPanel Orientation="Horizontal">
<Label>L2</Label>
</StackPanel>
<Label>
<TextBlock TextWrapping="Wrap">
This text wraps.
This text wraps.
This text wraps.
This text wraps.
This text wraps.
This text wraps.
This text wraps.
</TextBlock>
</Label>
</StackPanel>
</StackPanel>
</Page>
So the problem must be somewhere else.
Related
I got a weird problem on my xaml, in a stackPanel.
My stackPanel contains a textbox, and a button.
This should be on the same line (if possible, depending on the text width).
The problem is :
if the stackPanel have Orientation="Vertical", the button will go to the line bellow the text.
if the stackPanel have Orientation="Horizontal" , the line will not doing any break line, so all the line will go out of my grid.
<StackPanel Name="spRemplir"
Grid.Row="2"
Grid.ColumnSpan="6"
Width="560"
Margin="5,5,5,5"
Orientation="Horizontal"
VerticalAlignment="Center">
<TextBlock FontWeight="Bold"
Text={Binding Text}
TextWrapping="Wrap"/>
<Button Name="btRemplir"
Margin="5,0,0,0"
Width="150"
Content="Remplir"/>
</StackPanel>
How can I obtain a stackPanel, that will break lines if necessary, and have a text and a button on the same line?
Update with Wrapanel thanks to Eli Arbel :
<toolkit:WrapPanel Name="spRemplir"
Grid.Row="2"
Grid.ColumnSpan="6"
Margin="5,5,5,5"
Width="560"
Orientation="Horizontal">
<TextBlock FontWeight="Bold"
Text={Binding Text}
TextWrapping="Wrap"/>
<Button Name="btRemplir"
Content="Remplir"/>
</toolkit:WrapPanel>
But, the button still on the next line, while there is enough space after the text on the same line.
Itried removing the Width on the panel, but then, there is no more wrapping...
I don't understand. Even if there is stackPanel on the same Grid, they should not disturb the wrap panel right?
Thank you.
You can try a WrapPanel from the Silverlight Toolkit. Note this panel will not allow you to stretch the items to the container width.
You should also look into removing the fixed Width of the panel.
Try using a Grid instead of a StackPanel. The problem with StackPanel is that they do not report up the Visual Tree that they are out of room. This is not a bug, it's just the way they are and it's appropriate when you need it. But I avoid them except on the innermost elements. But don't have StackPanels in StackPanels as you will lose TextWrapping/Scrolling and just have elements fall of the right or bottom of the page.
Second, make sure that your outer container is Set so that the width is Constrained. For example, in your layout root, give it one Column, and set the Width for * which means = "The available space, but not more"
Once you have your outer container constrained, then your TextBlock will wrap properly.
Greg
Consider using a WrapPanel instead stack panel: http://wpftutorial.net/WrapPanel.html
I found this question while trying to figure out how to make a TextBlock wrap, when that TextBlock is the template for each item in an ItemsControl.
My original template:
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<TextBlock Padding="2" x:Name="SummaryRow" Text="{Binding}" TextWrapping="Wrap" />
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
In order to make the text actually wrap, I had to surround the TextBlock with a Border. I'm sure other containers would have worked as well.
Why is this? (btw I should mention that the ItemsControl is in a ScrollViewer)
For the text to be wrapped you need to restrict the size of the textBlock so as to wrap the text once it exceeds that restricted limit. But since your textBlock have scrollViewer outside, it has no restiction on its size and hence no wrap. You need to set the HorizontalScrollBarVisbility to Collapsed or Hidden to restrict the size and hence wrapping of text.
I'm presenting text in a wpf TextBlock control (.Net 3.5). The content of the textblock varies depending on what the user selects in a list box. The text wraps, so I don't need an horizontal scroll bar. However, there is often more text than the amount the window can display, so I need a vertical scroll bar.
As I started searching I quickly found that the answer is to wrap the TextBlock in a ScrollViewer. However, It Does Not Work (TM) and I'm hoping someone can help me work out why.
This is the structure of the UI code:
<Window x:Class=..>
<StackPanel>
<ListBox HorizontalAlignment="Stretch"
VerticalAlignment="Top" Height="200"
SelectionChanged="listbox_changed" SelectionMode="Single">
</ListBox>
<Button Click="Select_clicked">Select</Button>
<ScrollViewer VerticalScrollBarVisibility="Auto">
<TextBlock Name="textblock" TextWrapping="Wrap"/>
</ScrollViewer>
</StackPanel>
</Window>
When the user selects an item in the list box, some text associated with this item is presented in the TextBlock. I would have thought that the code as it stands should have been all that's required, but it never provides me with a scroll bar.
Searching and experimenting have given me two clues: the root of the problem might be related to me updating the content of the TextBlock dynamically, and that the TextBlock does not resize itself based on the new content. I found a posting that seemed relevant that said that by setting the Height of the TextBlock to its ActualHeight (after having changed its content), it would work. But it didn't (I can see no effect of this).
Second, if I set the height (during design time) of the ScrollViewer, then I do get a vertical scroll bar. For instance, if I set it to 300 in the xaml above, the result is almost good in that the window as first opened contains a TextBlock with a vertical scroll bar when (and only when) I need it. But if I make the window larger (resizing it with the mouse during runtime), the ScrollViewer does not exploit the new window size and instead keeps its height as per the xaml which of course won't do.
Hopefully, I've just overlooked something obvious..
Thanks!
Because your ScrollViewer is in a StackPanel it will be given as much vertical space as it needs to display it's content.
You would need to use a parent panel that restricts the vertical space, like DockPanel or Grid.
<DockPanel>
<ListBox DockPanel.Dock="Top" HorizontalAlignment="Stretch"
VerticalAlignment="Top" Height="200"
SelectionChanged="listbox_changed" SelectionMode="Single">
</ListBox>
<Button DockPanel.Dock="Top" Click="Select_clicked">Select</Button>
<ScrollViewer VerticalScrollBarVisibility="Auto">
<TextBlock Name="textblock" TextWrapping="Wrap"/>
</ScrollViewer>
</DockPanel>
I have looked at several code snippets where people suggest that the AcceptsReturn property of a textbox in Silverlight will enable multiple lines.
My problem however is when I add a textbox with said property and explicity set the height or allow it to fill the container, the text sits vertically in the middle of the textbox.
<Grid x:Name="LayoutRoot" >
<TextBox TextWrapping="Wrap" Text="TextBox" AcceptsReturn="True"/>
</Grid>
I need the text to anchor to the top of the textbox.
Ensure there is not an implicit style for the text box which is overriding the default expected behavior in this case. IN my case I was using the Cosmopolitan Theme from Microsoft and it had an implicit style for TextBox elements that did not produce the proper behavior.
In the resources from that theme if you look at the DefaultTextBoxStyle in the CoreStyles.xaml file, at line 448 you will find the ScrollViewer with a VerticalAlignment set to Center. Adjusting this to top solved my problem.
Try this:
<Grid x:Name="LayoutRoot">
<TextBox VerticalAlignment="Stretch" VerticalContentAlignment="Top"
TextWrapping="Wrap" Text="TextBox" AcceptsReturn="True"/>
</Grid>
The text is at the top of the box, and the the box stretches to fill the whole page.
In WPF, if i put any controls in grid, if i resize the grid, it automatically resizes all the controls in it.But in label or textblock or any other text elements, all the control sizes will change but font size remains same, it will not change.
If font has to change as per grid size, What should be done?
You can achieve this by using a ViewBox. It will transform (not resize) your font (well, the control) depending on the control size.
Look at this here for more information;
<Viewbox Stretch="Uniform">
<TextBlock Text="Test" />
</Viewbox>
The following lines also give the expected result.
<Viewbox>
<TextBlock TextWrapping="Wrap" Text="Some Text" />
</Viewbox>