如何在资源字典中使文本的一部分加粗

你可以用你的样式串inline document elements像<Bold>，<Italic>，<Underline>甚至<Run>。

special characters从字符串中逃脱。

使用Inlines附加属性，该属性将字符串转换为内联元素。

例

<TextBlock local:Inlines.Text="{StaticResource MyString}"/>

MyString的定义如下

<x:String x:Key="MyString">&lt;Bold&gt;This&lt;/Bold&gt; is a resource</x:String>

结果将是

内联附加属性的完整源代码

public class Inlines
{
    public static readonly DependencyProperty TextProperty = DependencyProperty.RegisterAttached("Text",
        typeof(string), typeof(Inlines), new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.AffectsMeasure, OnTextPropertyChanged));

    public static void SetText(DependencyObject @do, string value)
    {
        @do.SetValue(TextProperty, value);
    }

    public static string GetText(DependencyObject @do)
    {
        return (string)@do.GetValue(TextProperty);
    }

    private static void OnTextPropertyChanged(DependencyObject @do, DependencyPropertyChangedEventArgs e)
    {
        var textBlock = @do as TextBlock;

        if (textBlock == null)
        {
            throw new InvalidOperationException("This property may only be set on TextBox");
        }

        var value = GetText(@do);

        var text = "<Span xml:space=\"preserve\" xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\">" +
             $"{value ?? string.Empty}</Span>";

        textBlock.Inlines.Clear();

        using (var xmlReader = XmlReader.Create(new StringReader(text)))
        {
            var result = (Span)XamlReader.Load(xmlReader);
            textBlock.Inlines.Add(result);
        }
    }
}