在 RichTextBox 中格式化单词

问题描述

我正在使用以下代码查找以@"开头的每一行并将其设置为粗体:

I am using the following code to find each line that starts with "@" and format it by making it bold:

foreach (var line in tweetText.Document.Blocks)
        {
            var text = new TextRange(line.ContentStart,
                           line.ContentEnd).Text;
            line.FontWeight = text.StartsWith("@") ?
                           FontWeights.Bold : FontWeights.Normal;
        }

但是，我想使用代码来查找每个单词而不是以@"开头的行，因此我可以格式化如下段落:

However, I would like to use the code to find each word instead of line beginning with "@" so I could format a paragraph like:

废话废话 @username废话废话 @anotherusername

推荐答案

这可能需要一些优化，因为我做得很快，但这应该可以帮助你开始

This could probably use some optimization as I did it quick, but this should get you started

private void RichTextBox_TextChanged(object sender, TextChangedEventArgs e)
{    
     tweetText.TextChanged -= RichTextBox_TextChanged;
     int pos = tweetText.CaretPosition.GetOffsetToPosition(tweetText.Document.ContentEnd);

     foreach (Paragraph line in tweetText.Document.Blocks.ToList())
     {
        string text = new TextRange(line.ContentStart,line.ContentEnd).Text;

        line.Inlines.Clear();

        string[] wordSplit = text.Split(new char[] { ' ' });
        int count = 1;

        foreach (string word in wordSplit)
        {
            if (word.StartsWith("@"))
            {
                Run run = new Run(word);
                run.FontWeight = FontWeights.Bold;
                line.Inlines.Add(run);
            }
            else
            {
                line.Inlines.Add(word);
            }

            if (count++ != wordSplit.Length)
            {
                 line.Inlines.Add(" ");
            }
        }
     }

     tweetText.CaretPosition = tweetText.Document.ContentEnd.GetPositionAtOffset(-pos);
     tweetText.TextChanged += RichTextBox_TextChanged;
}

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