WPF TextBlock highlight certan parts based on search condition

Hello,

I have TextBlock that has Inlines dynamicly added to it (basically bunch of Run objects that are either italic or bold).

In my application I have search function.

I want to be able to highlight TextBlock's text that is in being searched for.

By highlighting I mean changing certain parts of TextBlock text's color (keeping in mind that it may highlight several different Run objects at a time).

I have tried this example http://blogs.microsoft.co.il/blogs/tamir/archive/2008/05/12/search-and-highlight-any-text-on-wpf-rendered-page.aspx

But it seams very unstable :(

Is there easy way to solve this problem?

From stackoverflow

• Ended up writing following code

  At moment has few bugs, but solves the problem

              if (Main.IsFullTextSearch)
          {
              for (int i = 0; i < runs.Count; i++)
              {
                  if (runs[i] is Run)
                  {
                      Run originalRun = (Run)runs[i];
  
                      if (Main.SearchCondition != null && originalRun.Text.ToLower().Contains(Main.SearchCondition.ToLower()))
                      {
                          int pos = originalRun.Text.ToLower().IndexOf(Main.SearchCondition.ToLower());
  
                          if (pos > 0)
                          {
                              Run preRun = CloneRun(originalRun);
                              Run postRun = CloneRun(originalRun);
  
                              preRun.Text = originalRun.Text.Substring(0, pos);
                              postRun.Text = originalRun.Text.Substring(pos + Main.SearchCondition.Length);
  
                              if (i - 1 < 0)
                                  runs.Insert(0, preRun);
                              else
                                  runs.Insert(i - 1, preRun);
  
                              runs.Insert(i + 1, new Run(" "));
                              runs.Insert(i + 2, postRun);
  
                              originalRun.Text = originalRun.Text.Substring(pos, Main.SearchCondition.Length);
  
                              SolidColorBrush brush = new SolidColorBrush(Colors.Yellow);
                              originalRun.Background = brush;
  
                              i = i + 3;
                          }
                      }
                  }
              }
          }
  

• Can you please provide the full code. Because i am not getting any CloneRun method. Thanks in advance.