面对同样的问题并且未能找到“5 分钟准备就绪”的解决方案，我开发了自己的 RichTextBox 扩展来突出显示 XML。
由于时间压力，我开发得很快，没有时间修改它——所以请随时改进它。
只需复制并粘贴扩展代码以与您的 RichTextBox 一起使用或复制整个应用程序代码，包括同步和异步使用
扩展方法
// Use for asynchronous highlight
public delegate void VoidActionOnRichTextBox(RichTextBox richTextBox);
// Extension Class
public static class RichTextBoxExtensions
{
public static void HighlightXml(this RichTextBox richTextBox)
{
new StandardHighlight().HighlightXml(richTextBox);
}
public async static void HighlightXmlAsync(this RichTextBox richTextBox)
{
var helper = new StandardHighlight();
var win = new MainWindow();
await Task.Factory.StartNew(() =>
{
richTextBox.Dispatcher.BeginInvoke(new VoidActionOnRichTextBox(helper.HighlightXml), richTextBox);
});
}
}
// You can extent it with more highlight methods
public class StandardHighlight
{
public void HighlightXml(RichTextBox richTextBox)
{
// Collect Text-Box Information
var textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd).Text;
XDocument xDocument;
try
{
xDocument = XDocument.Parse(textRange);
}
catch
{
return;
}
var documentLines = xDocument.ToString().Split(new[] { Environment.NewLine }, StringSplitOptions.None);
// Get the Longest Line Length
int? maxVal = null;
for (int i = 0; i < documentLines.Length; i++)
{
int thisNum = documentLines[i].Length;
if (!maxVal.HasValue || thisNum > maxVal.Value) { maxVal = thisNum; }
}
// Set Text-Box Width & Clear the Current Content
if (maxVal != null) richTextBox.Document.PageWidth = (double)maxVal * 5.5;
richTextBox.Document.Blocks.Clear();
#region *** Process Lines ***
foreach (var documentLine in documentLines)
{
// Parse XML Node Components
var indentSpace = Regex.Match(documentLine, @"\s+").Value;
var xmlTags = Regex.Matches(documentLine, @"(<[^/].+?)(?=[\s])|(<[^/].+?>)|(</.+?>)");
if (documentLine.Contains("<!--")) xmlTags = Regex.Matches(documentLine, @"(<[^/].+?>)"); // Parse comments
var nodeAttributes = Regex.Matches(documentLine, @"(?<=\s)(.+?)(?=\s)");
// Process XML Node
var nodeAttributesCollection = new List<Run>();
if (nodeAttributes.Count > 0)
{
for (int i = 0; i < nodeAttributes.Count; i++)
{
if (!(nodeAttributes[i].Value.Length < 2) && !(documentLine.Contains("<!--")))
{
var attributeName = $"{Regex.Match(nodeAttributes[i].Value, @"(.+?=)").Value}";
if (i == 0) attributeName = $" {Regex.Match(nodeAttributes[i].Value, @"(.+?=)").Value}";
var attributeValue = $"{Regex.Match(nodeAttributes[i].Value, @"(?<=(.+?=))"".+?""").Value} ";
if (i == nodeAttributes.Count - 1) attributeValue = attributeValue.Trim();
nodeAttributesCollection.Add(new Run { Foreground = new SolidColorBrush(Colors.Green), Text = $"{attributeName}" });
nodeAttributesCollection.Add(new Run { Foreground = new SolidColorBrush(Colors.Brown), Text = $"{attributeValue}" });
}
}
}
// Initialize IndentSpace
Run run = null;
if (indentSpace.Length > 1) run = new Run { Text = indentSpace };
// Initialize Open Tag
var tagText = xmlTags[0].Value.Substring(1, xmlTags[0].Value.Length - 2);
var tagTextBrush = new SolidColorBrush(Colors.Blue);
var tagBorderBruh = new SolidColorBrush(Colors.Red);
if (tagText.StartsWith("!--"))
{
tagTextBrush = new SolidColorBrush(Colors.DarkSlateGray);
tagBorderBruh = new SolidColorBrush(Colors.DarkSlateGray);
}
var openTag = new Run
{
Foreground = tagTextBrush,
Text = tagText
};
// Initialize Content Tag
var content = new Run
{
Foreground = new SolidColorBrush(Colors.Black),
};
// Initialize Paragraph
var paragraph = new Paragraph();
paragraph.Margin = new Thickness(0);
if (run != null) paragraph.Inlines.Add(run); // Add indent space if exist
// Process Open Tag
paragraph.Inlines.Add(new Run { Foreground = tagBorderBruh, Text = "<" });
paragraph.Inlines.Add(openTag);
// Process Open Tag Attributes
if (nodeAttributesCollection.Count > 0)
{
nodeAttributesCollection.ForEach(attribute => { paragraph.Inlines.Add(attribute); });
nodeAttributesCollection.Clear();
}
paragraph.Inlines.Add(new Run { Foreground = tagBorderBruh, Text = ">" });
// Process Closing Tag
if (xmlTags.Count > 1)
{
Run closingTag = new Run();
content.Text = documentLine.Replace(xmlTags[0].Value, "").Replace(xmlTags[1].Value, "").Trim();
closingTag = new Run
{
Foreground = new SolidColorBrush(Colors.Blue),
Text = xmlTags[1].Value.Substring(1, xmlTags[1].Value.Length - 2)
};
paragraph.Inlines.Add(content);
paragraph.Inlines.Add(new Run { Foreground = new SolidColorBrush(Colors.Red), Text = "<" });
paragraph.Inlines.Add(closingTag);
paragraph.Inlines.Add(new Run { Foreground = new SolidColorBrush(Colors.Red), Text = ">" });
}
richTextBox.Document.Blocks.Add(paragraph);
}
#endregion
}
}