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POHow do I make my richTextBox search case-insensitive?
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  1. POHow do I make my richTextBox search case-insensitive?
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    copied!<p>I am making a word processor. The word processor has a facility which allows the user to search the richTextBox for text.</p> <p>Currently, my "find" code consists of:</p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Basic_Word_Processor { public partial class Find : Form { public Find() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { int index = 0; string temp = Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.Text; Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.Text = ""; Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.Text = temp; while (index &lt; Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.Text.LastIndexOf(textBox1.Text)) { Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.Find(textBox1.Text, index, Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.TextLength, RichTextBoxFinds.None); Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.SelectionBackColor = Color.Yellow; index = Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.Text.IndexOf(textBox1.Text, index) +1; { } } } private void Find_FormClosing(object sender, FormClosingEventArgs e) { Basic_Word_Processor.Instance.richTextBoxPrintCtrl1.SelectionBackColor = Color.White; } } } </code></pre> <p>However, if the richTextBox contains the word "TEST", and the user searched for "test", no results would be found.</p> <p>I asked the same question on the MSDN forum, but I was told to convert the textBox and richTextBox ToLower, which worked, but it made the text in the richTextBox lower case. I do not want it to change the actual text in the richTextBox.</p> <p>Any suggestions? </p> <p><strong>EDIT</strong> </p> <p>The textBox is on the Find form and the richTextBox is on the Basic_Word_Processor form.</p>
 

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