Text vertical alignment in WPF TextBlock

问题:

How do I assign vertical center alignment to the text inside a TextBlock? I found TextAlignment property but it is for horizontal text alignment. How do I do it for vertical text alignment?

回答1:

A Textblock itself can't do vertical alignment

The best way to do this that I've found is to put the textblock inside a border, so the border does the alignment for you.

<Border BorderBrush="{x:Null}" Height="50">
    <TextBlock TextWrapping="Wrap" Text="Some Text" VerticalAlignment="Center"/>
</Border>

Note: This is functionally equivalent to using a grid, it just depends how you want the controls to fit in with the rest of your layout as to which one is more suitable

回答2:

While Orion Edwards Answer works for any situation, it may be a pain to add the border and set the properties of the border every time you want to do this. Another quick way is to set the padding of the text block:

<TextBlock Height="22" Padding="3" />

回答3:

The TextBlock doesn't support vertical text alignment.

I work around this by wrapping the text block with a Grid and setting HorizontalAlignment="Stretch" and VerticalAlignment="Center".

Like this:

    <Grid>
        <TextBlock 
            HorizontalAlignment="Stretch"
            VerticalAlignment="Center"
            Text="Your text" />
    </Grid>

回答4:

You can use label instead of textblock.

<Label Content="Hello, World!">
    <Label.LayoutTransform>
        <RotateTransform Angle="270"/>
    </Label.LayoutTransform>
</Label>

回答5:

For me, VerticalAlignment="Center" fixes this problem.
This could be because the TextBlockis wrapped in a grid, but then so is practically everything in wpf.

回答6:

If you can do without the text wrapping, I think that replacing the TextBlock with a Label is the most succinct way to do this. Otherwise follow one of the other valid answers.

<Label Content="Some Text" VerticalAlignment="Center"/>

回答7:

I've found that modifying the textbox style (ie: controltemplate) and then modifying the PART_ContentHost vertical alignment to Center will do the trick

回答8:

Just for giggles, give this XAML a whirl. It isn't perfect as it is not an 'alignment' but it allows you to adjust text alignment within a paragraph.

<TextBlock>
    <TextBlock BaselineOffset="30">One</TextBlock>
    <TextBlock BaselineOffset="20">Two</TextBlock>  
    <Run>Three</Run>            
    <Run BaselineAlignment="Subscript">Four</Run>   
</TextBlock>

回答9:

If you can overlook the height of TextBlock, it's better for you to use this:

<TextBlock Height="{Binding}" Text="Your text"
TextWrapping="Wrap" VerticalAlignment="Center" Width="28"/>

回答10:

In my case, I did this to make the TextBlock display nicer.

<Border BorderThickness="3" BorderBrush="Yellow" CornerRadius="10" Padding="2"
    HorizontalAlignment="Center" VerticalAlignment="Center" Height="30" Width="150">
        <TextBlock FontSize="20" Height="23" HorizontalAlignment="Left" Margin="0,0,0,-5" Text="" VerticalAlignment="Top" Width="141" Background="White" />
</Border>

The trick to make the text further from the bottom is to set

Margin="0,0,0,-5"

回答11:

You can see my blog post. You can set custom height of Textblock from codebehind. For setting custom height you need to set it inside in a border or stackpanel

http://ciintelligence.blogspot.com/2011/02/wpf-textblock-vertical-alignment-with.html

回答12:

I found I had to do it slightly different. My problem was that if I changed the font size, the text would move up in the TextBox instead of stay on the bottom with the rest of TextBoxes on the line. By changing the vert alignment from top to bottom I was able to change the font programmatically from size 20 to size 14 & back, keeping text's gravity on the bottom and keeping things neat. Here's how:

回答13:

To expand on the answer provided by @Orion Edwards, this is how you would do fully from code-behind (no styles set). Basically create a custom class that inherits from Border which has its Child set to a TextBox. The example below assumes that you only want a single line and that the border is a child of a Canvas. Also assumes you would need to adjust the MaxLength property of the TextBox based on the width of the Border. The example below also sets the cursor of the Border to mimic a Textbox by setting it to the type 'IBeam'. A margin of '3' is set so that the TextBox isn't absolutely aligned to the left of the border.

double __dX = 20;
double __dY = 180;
double __dW = 500;
double __dH = 40;
int __iMaxLen = 100;

this.m_Z3r0_TextBox_Description = new CZ3r0_TextBox(__dX, __dY, __dW, __dH, __iMaxLen, TextAlignment.Left);
this.Children.Add(this.m_Z3r0_TextBox_Description);

Class:

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Controls.Primitives;


namespace ifn0tz3r0Exp
{
    class CZ3r0_TextBox : Border
    {
        private TextBox m_TextBox;

        private SolidColorBrush m_Brush_Green = new SolidColorBrush(Colors.MediumSpringGreen);
        private SolidColorBrush m_Brush_Black = new SolidColorBrush(Colors.Black);
        private SolidColorBrush m_Brush_Transparent = new SolidColorBrush(Colors.Transparent);

        public CZ3r0_TextBox(double _dX, double _dY, double _dW, double _dH, int _iMaxLen, TextAlignment _Align)
        {

            /////////////////////////////////////////////////////////////
            //TEXTBOX
            this.m_TextBox = new TextBox();
            this.m_TextBox.Text = "This is a vertically centered one-line textbox embedded in a border...";
            Canvas.SetLeft(this, _dX);
            Canvas.SetTop(this, _dY);
            this.m_TextBox.FontFamily = new FontFamily("Consolas");
            this.m_TextBox.FontSize = 11;
            this.m_TextBox.Background = this.m_Brush_Black;
            this.m_TextBox.Foreground = this.m_Brush_Green;
            this.m_TextBox.BorderBrush = this.m_Brush_Transparent;
            this.m_TextBox.BorderThickness = new Thickness(0.0);
            this.m_TextBox.Width = _dW;
            this.m_TextBox.MaxLength = _iMaxLen;
            this.m_TextBox.TextAlignment = _Align;
            this.m_TextBox.VerticalAlignment = System.Windows.VerticalAlignment.Center;
            this.m_TextBox.FocusVisualStyle = null;
            this.m_TextBox.Margin = new Thickness(3.0);
            this.m_TextBox.CaretBrush = this.m_Brush_Green;
            this.m_TextBox.SelectionBrush = this.m_Brush_Green;
            this.m_TextBox.SelectionOpacity = 0.3;

            this.m_TextBox.GotFocus += this.CZ3r0_TextBox_GotFocus;
            this.m_TextBox.LostFocus += this.CZ3r0_TextBox_LostFocus;
            /////////////////////////////////////////////////////////////
            //BORDER

            this.BorderBrush = this.m_Brush_Transparent;
            this.BorderThickness = new Thickness(1.0);
            this.Background = this.m_Brush_Black;            
            this.Height = _dH;
            this.Child = this.m_TextBox;
            this.FocusVisualStyle = null;
            this.MouseDown += this.CZ3r0_TextBox_MouseDown;
            this.Cursor = Cursors.IBeam;
            /////////////////////////////////////////////////////////////
        }
        private void CZ3r0_TextBox_MouseDown(object _Sender, MouseEventArgs e)
        {
            this.m_TextBox.Focus();
        }
        private void CZ3r0_TextBox_GotFocus(object _Sender, RoutedEventArgs e)
        {
            this.BorderBrush = this.m_Brush_Green;
        }
        private void CZ3r0_TextBox_LostFocus(object _Sender, RoutedEventArgs e)
        {
            this.BorderBrush = this.m_Brush_Transparent;
        }
    }
}

回答14:

I think is better to use a Label(or TextBlock) into a Label, you can't attach a mouse event directly in the border control, finally it is attached in the TextBlock, this is my recomendation:

<Label 
    Height="32"
    VerticalContentAlignment="Center"
    HorizontalContentAlignment="Stretch"
    MouseLeftButtonUp="MenuItem_MouseLeftButtonUp">
    <TextBlock Padding="32 0 10 0">
        Label with click event
    </TextBlock>
</Label>

回答15:

  <TextBox AcceptsReturn="True" 
           TextWrapping="Wrap"  
           VerticalContentAlignment="Top" >
  </TextBox>

回答16:

TextBlock doesn't support vertical alignment of its content. If you must use TextBlock then you have to align it with respect to its parent.

However if you can use Label instead (and they do have very similar functionality) then you can position the text content:

<Label VerticalContentAlignment="Center" HorizontalContentAlignment="Center">
   I am centred text!
</Label>

The Label will stretch to fill its bounds by default, meaning the label's text will be centred.