How do you find at what line a word is located in a textbox?

Question

I'm currently working on a notepad that has a find option. When you type in a word it'll find it and highlight it. I got it working but I've reached a wall that I can't seem to pass with the method i'm currently using to do it. I'm currently splitting all the words in the textbox with ' ' and adding up the length of the words untill I find the inputted search term so I can see where exactly the found word was, so I can highlight it.

The problem I have now though, is that since i'm using split(' ') to get each word in the textbox, whenever the user adds a new line the split's return array will be "wordOnFirstLine\r\nwordOnSecondLine". So they will be counted as one word. What's another way I can find a word in the textbox and see where exactly it's located so I can highlight it?

Answer 1

Try splitting the string as

string splitstring = stringToSplit.Split(new char[] { ' ', '\n', '\r' });

It'll give you an empty string in between all the '\n' and '\r' characters, but that fix may be closest to what you're currently doing.

Answer 2

I believe you're looking for the GetLineFromCharIndex(int) method. Passing in the index of the first character in your word should return its line number.