How to make search text in richtextbox function, like texteditors search function, on windows forms

Question

0.00/5 (No votes)

See more:

my solution find and scroll to that found text but it doesn't selects all searched words
these select just a word

What I have tried:

C#

richTextBox1.Focus();
int start = richTextBox1.Text.IndexOf(textBox1.Text[0]);
int end = textBox1.Text.Length;
richTextBox1.Select(start, end);

Posted 23-Apr-19 3:16am

Member 14145167

Updated 23-Apr-19 3:53am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2019-04-23T03:54:00

String.IndexOf finds only the first occurrence in the string, so you need to repeat teh search using the overloaded methods.

public static class MyExtensions
    {
    public static List<int> AllIndexesOf(this string s, string lookFor)
        {
        List<int> indexes = new List<int>();
        int index = s.IndexOf(lookFor);
        int len = lookFor.Length;
        while (index >= 0)
            {
            indexes.Add(index);
            index = s.IndexOf(lookFor, index + len);
            }
        return indexes;
        }
    }

Will find them all:

List<int> x = "abcdabceab".AllIndexesOf("abc");

will return a List of two indexes.

But ... you can't select more than one text area - you will have to manually (and temporarily) highlight them yourself, or provide a "find next" function as some text editors do.