ClearRenderedFoundText Method

using Leadtools; 
using Leadtools.Controls; 
using Leadtools.Document; 
using Leadtools.Document.Viewer; 
using Leadtools.Codecs; 
using Leadtools.Caching; 
using Leadtools.Annotations.Engine; 
using Leadtools.Ocr; 
 
 
var text = _documentViewer.Text; 
 
// Make sure we get the page text if necessary 
text.AutoGetText = true; 
 
// We will find all matches of "LEAD", ignoring the case 
var options = new DocumentViewerFindText(); 
 
// The text 
options.Text = "LEAD"; 
// Ignore case 
options.MatchCase = false; 
// Any word that contains the phrase 
options.WholeWordsOnly = false; 
 
// Find all results in the bounds, not just the first 
options.FindAll = true; 
 
// Highlight the results in the View 
options.RenderResults = true; 
// Optionally change the highlight color 
//DocumentViewerText.FoundTextBrush = new SolidBrush(Color.FromArgb(52, Color.Brown)); 
 
// Set the bounds 
bool isFindingNext = true; 
// We set the bounds as the whole document, but below we can specify to start wherever text is selected 
// or at the current page 
var topOfFirstPage = DocumentViewerTextPosition.CreateBeginOfPage(1); 
var bottomOfLastPage = DocumentViewerTextPosition.CreateEndOfPage(_documentViewer.PageCount); 
if (isFindingNext) 
{ 
   // Make the beginning bound "higher up" the page so we search "down" the page. 
   options.BeginPosition = topOfFirstPage; 
   options.EndPosition = bottomOfLastPage; 
} 
else 
{ 
   // Make the beginning bound "lower down" the page so we search "up" the page. 
   options.BeginPosition = bottomOfLastPage; 
   options.EndPosition = topOfFirstPage; 
} 
 
// Select the first result in the View (automatically scrolls View also) 
options.SelectFirstResult = true; 
 
if (text.HasAnySelectedText) 
{ 
   // Setting this value to AfterSelection allows us to search forward from the selection, so multiple 
   // uses of this same options object will cycle us through all the matches! 
   // (If no selected text actually exists, search will default to beginPosition.) 
   options.Start = DocumentViewerFindTextStart.AfterSelection; 
} 
else 
{ 
   // We could start at the begin position, but it makes more UI sense to start from the user's current page. 
   // Search will loop back around to the begin position - this just changes the starting point and order of results. 
   options.Start = DocumentViewerFindTextStart.ManualPosition; 
   if (isFindingNext) 
      options.ManualStartPosition = DocumentViewerTextPosition.CreateBeginOfPage(_documentViewer.CurrentPageNumber); 
   else 
      options.ManualStartPosition = DocumentViewerTextPosition.CreateEndOfPage(_documentViewer.CurrentPageNumber); 
} 
 
// If we were just looking for the first match, we could use "Loop" to loop around 
// if we found nothing between the start position and the end bound. 
//options.Loop = true; 
 
// You will likely want to clear the previous highlighted results 
// on the screen so only our new results will show. 
text.ClearRenderedFoundText(); 
 
// Search 
var results = text.Find(options); 
int resultsCount = results != null ? results.Count : 0; 
 
if (resultsCount > 0) 
   Console.WriteLine(string.Format("Found {0} results", resultsCount)); 
else 
   Console.WriteLine("No matches found.");