WPF/XAML: How to make all text upper case in TextBlock? - wpf

Question

I want all characters in a TextBlock to be displayed in uppercase
<TextBlock Name="tbAbc"
FontSize="12"
TextAlignment="Center"
Text="Channel Name"
Foreground="{DynamicResource {x:Static r:RibbonSkinResources.RibbonGroupLabelFontColorBrushKey}}" />
The strings are taken through Binding. I don't want to make the strings uppercase in the dictionary itself.

Answer 1

Or use
Typography.Capitals="AllSmallCaps"
in your TextBlock definition.
See here: MSDN - Typography.Capitals
EDIT:
This does not work in Windows Phone 8.1, only in Windows 8.1 ...

Answer 2

Implement a custom converter.
using System.Globalization;
using System.Windows.Data;
// ...
public class StringToUpperConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value != null && value is string )
{
return ((string)value).ToUpper();
}
return value;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return null;
}
}
Then include that in your XAML as a resource:
<local:StringToUpperConverter x:Key="StringToUpperConverter"/>
And add it to your binding:
Converter={StaticResource StringToUpperConverter}

Answer 3

You can use an attached property like this:
public static class TextBlock
{
public static readonly DependencyProperty CharacterCasingProperty = DependencyProperty.RegisterAttached(
"CharacterCasing",
typeof(CharacterCasing),
typeof(TextBlock),
new FrameworkPropertyMetadata(
CharacterCasing.Normal,
FrameworkPropertyMetadataOptions.Inherits | FrameworkPropertyMetadataOptions.NotDataBindable,
OnCharacterCasingChanged));
private static readonly DependencyProperty TextProxyProperty = DependencyProperty.RegisterAttached(
"TextProxy",
typeof(string),
typeof(TextBlock),
new PropertyMetadata(default(string), OnTextProxyChanged));
private static readonly PropertyPath TextPropertyPath = new PropertyPath("Text");
public static void SetCharacterCasing(DependencyObject element, CharacterCasing value)
{
element.SetValue(CharacterCasingProperty, value);
}
public static CharacterCasing GetCharacterCasing(DependencyObject element)
{
return (CharacterCasing)element.GetValue(CharacterCasingProperty);
}
private static void OnCharacterCasingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is System.Windows.Controls.TextBlock textBlock)
{
if (BindingOperations.GetBinding(textBlock, TextProxyProperty) == null)
{
BindingOperations.SetBinding(
textBlock,
TextProxyProperty,
new Binding
{
Path = TextPropertyPath,
RelativeSource = RelativeSource.Self,
Mode = BindingMode.OneWay,
});
}
}
}
private static void OnTextProxyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
d.SetCurrentValue(System.Windows.Controls.TextBlock.TextProperty, Format((string)e.NewValue, GetCharacterCasing(d)));
string Format(string text, CharacterCasing casing)
{
if (string.IsNullOrEmpty(text))
{
return text;
}
switch (casing)
{
case CharacterCasing.Normal:
return text;
case CharacterCasing.Lower:
return text.ToLower();
case CharacterCasing.Upper:
return text.ToUpper();
default:
throw new ArgumentOutOfRangeException(nameof(casing), casing, null);
}
}
}
}
Then usage in xaml will look like:
<StackPanel>
<TextBox x:Name="TextBox" Text="abc" />
<TextBlock local:TextBlock.CharacterCasing="Upper" Text="abc" />
<TextBlock local:TextBlock.CharacterCasing="Upper" Text="{Binding ElementName=TextBox, Path=Text}" />
<Button local:TextBlock.CharacterCasing="Upper" Content="abc" />
<Button local:TextBlock.CharacterCasing="Upper" Content="{Binding ElementName=TextBox, Path=Text}" />
</StackPanel>

Answer 4

If it's not a big deal you could use TextBox instead of TextBlock like this:
<TextBox CharacterCasing="Upper" IsReadOnly="True" />

Answer 5

While there's already a great answer here that uses a converter, I'm providing an alternative implementation that simplifies the conversion to a single line (thanks to null coalescing), as well as making it a subclass of MarkupExtension so it's easier to use in XAML.
Here's the converter...
using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Markup;
namespace IntuoSoft.Wpf.Converters {
[ValueConversion(typeof(string), typeof(string))]
public class CapitalizationConverter : MarkupExtension, IValueConverter {
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
=> (value as string)?.ToUpper() ?? value; // If it's a string, call ToUpper(), otherwise, pass it through as-is.
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
=> throw new NotSupportedException();
public override object ProvideValue(IServiceProvider serviceProvider) => this;
}
}
And here's how you use it (Note: This assumes the above namespace is prefixed with is in your XAML):
<TextBlock Text={Binding SomeValue, Converter={is:CapitalizationConverter}}" />
Because it's a MarkupExtension subclass, you can simply use it right where/when it's needed. No need to define it in the resources first.

Answer 6

I use a character casing value converter:
class CharacterCasingConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var s = value as string;
if (s == null)
return value;
CharacterCasing casing;
if (!Enum.TryParse(parameter as string, out casing))
casing = CharacterCasing.Upper;
switch (casing)
{
case CharacterCasing.Lower:
return s.ToLower(culture);
case CharacterCasing.Upper:
return s.ToUpper(culture);
default:
return s;
}
}
object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
}