使用inline属性
后台：
public static string GetInlineText(DependencyObject obj)
{
return (string)obj.GetValue(InlineTextProperty);
}
public static void SetInlineText(DependencyObject obj, string value)
{
obj.SetValue(InlineTextProperty, value);
}
public static readonly DependencyProperty InlineTextProperty = DependencyProperty.RegisterAttached(
"InlineText",
typeof(string),
typeof(InlineTextBehaviour),
new PropertyMetadata(null, InlineTextChanged)
);
static void InlineTextChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var textBlock = sender as TextBlock;
if (textBlock != null)
{
textBlock.Inlines.Clear();
textBlock.Inlines.Add(FormatText(e.NewValue as string ?? ""));
}
}
static Dictionary<string, Func<string, Run>> keywords = new Dictionary<string, Func<string, Run>>()
{
{"你好", s => new Run(s){Foreground = Brushes.Red}},
{"朋友", s => new Run(s){Foreground = Brushes.Blue, FontSize = 28}},
};
static Inline FormatText(string text)
{
Span span = new Span();
int startIndex = 0;
while (true)
{
var hit = keywords.Keys.Select(k => new { word = k, index = text.IndexOf(k, startIndex) }).OrderBy(x => (uint)x.index).FirstOrDefault();
if(hit.index < 0)
{
span.Inlines.Add(new Run(text.Substring(startIndex)));
break;
}
span.Inlines.Add(new Run(text.Substring(startIndex, hit.index - startIndex)));
span.Inlines.Add(keywords[hit.word](hit.word));
startIndex = hit.index + hit.word.Length;
}
return span;
}
前台：
<TextBlock loc:InlineTextBehaviour.InlineText="你好，1111朋友" />