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POHow can I optimize this or is there a better way to do it?(HTML Syntax Highlighter)
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  1. POHow can I optimize this or is there a better way to do it?(HTML Syntax Highlighter)
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    copied!<p>I have made a HTML syntax highlighter in C# and it works great, but there's one problem. First off It runs pretty fast because it syntax highlights line by line, but when I paste more than one line of code or open a file I have to highlight the whole file which can take up to a minute for a file with only 150 lines of code. I tried just highlighting visible lines in the richtextbox but then when I try to scroll I can't it to highlight the new visible text. Here is my code:(note: I need to use regex so I can get the stuff in between &lt; &amp; > characters)</p> <p>Highlight Whole File:</p> <pre><code> public void AllMarkup() { int selectionstart = richTextBox1.SelectionStart; Regex rex = new Regex("&lt;html&gt;|&lt;/html&gt;|&lt;head.*?&gt;|&lt;/head&gt;|&lt;body.*?&gt;|&lt;/body&gt;|&lt;div.*?&gt;|&lt;/div&gt;|&lt;span.*?&gt;|&lt;/span&gt;|&lt;title.*?&gt;|&lt;/title&gt;|&lt;style.*?&gt;|&lt;/style&gt;|&lt;script.*?&gt;|&lt;/script&gt;|&lt;link.*?/&gt;|&lt;meta.*?/&gt;|&lt;base.*?/&gt;|&lt;center.*?&gt;|&lt;/center&gt;|&lt;a.*?&gt;|&lt;/a&gt;"); foreach (Match m in rex.Matches(richTextBox1.Text)) { richTextBox1.Select(m.Index, m.Value.Length); richTextBox1.SelectionColor = Color.Blue; richTextBox1.Select(selectionstart, -1); richTextBox1.SelectionColor = Color.Black; } richTextBox1.SelectionStart = selectionstart; } private void pasteToolStripMenuItem_Click(object sender, EventArgs e) { try { LockWindowUpdate(richTextBox1.Handle);//Stops text from flashing flashing richTextBox1.Paste(); AllMarkup(); }finally { LockWindowUpdate(IntPtr.Zero); } } </code></pre> <p>I want to know if there's a better way to highlight this and make it faster or if someone can help me make it highlight only the visible text.</p> <p>Please help. :) Thanks, Tanner.</p>
 

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