您应该使用 RegEx 之类的东西或使用html agility pack之类的库来解析字符串。这个扩展方法应该可以工作,让你只需调用richTextBlock.SetLinkedText(htmlFragment);
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
public static class RichTextBlockExtensions
{
public static void SetLinkedText(this RichTextBlock richTextBlock, string htmlFragment)
{
var regEx = new Regex(
@"\<a\s(href\=""|[^\>]+?\shref\="")(?<link>[^""]+)"".*?\>(?<text>.*?)(\<\/a\>|$)",
RegexOptions.IgnoreCase | RegexOptions.Multiline);
richTextBlock.Blocks.Clear();
int nextOffset = 0;
foreach (Match match in regEx.Matches(htmlFragment))
{
if (match.Index > nextOffset)
{
richTextBlock.AppendText(htmlFragment.Substring(nextOffset, match.Index - nextOffset));
nextOffset = match.Index + match.Length;
richTextBlock.AppendLink(match.Groups["text"].Value, new Uri(match.Groups["link"].Value));
}
Debug.WriteLine(match.Groups["text"] + ":" + match.Groups["link"]);
}
if (nextOffset < htmlFragment.Length)
{
richTextBlock.AppendText(htmlFragment.Substring(nextOffset));
}
}
public static void AppendText(this RichTextBlock richTextBlock, string text)
{
Paragraph paragraph;
if (richTextBlock.Blocks.Count == 0 ||
(paragraph = richTextBlock.Blocks[richTextBlock.Blocks.Count - 1] as Paragraph) == null)
{
paragraph = new Paragraph();
richTextBlock.Blocks.Add(paragraph);
}
paragraph.Inlines.Add(new Run { Text = text });
}
public static void AppendLink(this RichTextBlock richTextBlock, string text, Uri uri)
{
Paragraph paragraph;
if (richTextBlock.Blocks.Count == 0 ||
(paragraph = richTextBlock.Blocks[richTextBlock.Blocks.Count - 1] as Paragraph) == null)
{
paragraph = new Paragraph();
richTextBlock.Blocks.Add(paragraph);
}
var run = new Run { Text = text };
var link = new Hyperlink { NavigateUri = uri };
link.Inlines.Add(run);
paragraph.Inlines.Add(link);
}
}
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
this.richTextBlock.SetLinkedText(
"Download it directly to the <a href=\"http://itunes.apple.com/fi/app/goalapp/id502461189?ls=1&mt=8\">iTunes Store</a> or <a href=\"https://market.android.com/details?id=com.strikersoft.meramal.se\">Android Market</a>. The application is launched for Swedish app store.");
}
}