RTF

Omar Mardini

HI all:

i've tried to make a simple notepad in c# but i want to know how can i find a word in the text (i'm using Rich text box)

pleas help me???

3 Replies

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Alan18y ago
To find embedded words as well as complete words, just remove the two word boundary metacharacters \b from the regular expression:

Regex r = new Regex( word , RegexOptions.IgnoreCase);
Omar Mardini18y ago
Thanks Alan it works but if u can post how can i find a part of word and mark the word wich i found

thanks
Alan18y ago
To find only complete words (as opposed to words embedded in other words) regular expressions are your best option. Here's some code which looks for all occurrences (ignoring case) within the RTB of a word entered in an (ordinary) textbox and then emboldens them:

using System.Text.RegularExpressions;

.......

string word = textBox1.Text; // say

Regex r = new Regex(@"\b" + word + @"\b", RegexOptions.IgnoreCase);

MatchCollection mc = r.Matches(richTextBox1.Text);

foreach (Match m in mc)

{

richTextBox1.SelectionStart = m.Index;

richTextBox1.SelectionLength = word.Length;

richTextBox1.SelectionFont = new Font(richTextBox1.Font, FontStyle.Bold);

richTextBox1.SelectionLength = 0;

}