ES-975464 - Resolve the ReadMe file length issue in this sample repository

Author: SreemonPremkumarM

README.md

@@ -1,6 +1,46 @@
-# How to search and highlight item in TreeViewAdv?
-This example demonstrates how to search and highlighted the item of TreeViewAdv control in WPF platform.
+# How to search and highlight item in TreeViewAdv
+
+This example demonstrates how to search and highlighted the item of `TreeViewAdv` control in WPF platform.
 
 # About Sample
 
-This sample provides the demo on how to search and highlight the text in TreeViewAdv.
+This sample provides the demo on how to search and highlight the text in `TreeViewAdv`.
+
+To search and highlight the item in `TreeViewAdv`, Search method has been implemented which is used to compare the search text with model items. Highlighted the matched text in TextBlock inside the `TreeViewItemAdv`.
+
+``` c#
+if (mainitem != null && MatchSearchText(model.Header))
+{
+  //Function which is used to apply inline to the TextBlock
+  ApplyInline(mainitem, false);                      
+}
+```
+
+Options like Search, FindPrevious, Find Next, SearchType (Contains, EndsWith, StartsWith options) has been used to match search text using ApplyInline method and apply the SearchBrush for highlighting the search text.
+
+``` c#
+if (!string.IsNullOrEmpty(tempSearchText))
+            {
+                if (this.SearchType == SearchType.StartsWith)
+                {
+                    if (!(bool)CaseSensitiveSearchCheckBox.IsChecked)
+                        regex = new Regex("^(" + tempSearchText + ")", RegexOptions.IgnoreCase);
+                    else
+                        regex = new Regex("^(" + tempSearchText + ")", RegexOptions.None);
+                }
+                else if (this.SearchType == SearchType.EndsWith)
+                {
+                    if (!(bool)CaseSensitiveSearchCheckBox.IsChecked)
+                        regex = new Regex("(" + tempSearchText + ")$", RegexOptions.IgnoreCase);
+                    else
+                        regex = new Regex("(" + tempSearchText + ")$", RegexOptions.None);
+                }
+                else
+                {
+                    if (!(bool)CaseSensitiveSearchCheckBox.IsChecked)
+                        regex = new Regex("(" + tempSearchText + ")", RegexOptions.IgnoreCase);
+                    else
+                        regex = new Regex("(" + tempSearchText + ")", RegexOptions.None);
+                }   
+}
+```