How to extract last word in richtextbox in c#

Question

I am working with windows form. In my project i need to color the last word of rich text box. When someone write on the given text box of the application i need the last word that is just written on the richtextbox to be colored red or whatever.

I found a way to extract the last word from the following link

http://msdn.microsoft.com/en-us/library/system.windows.documents.textselection.select%28v=vs.95%29.aspx

But i need more handy code to extract the last word if its possible. Please help.

Sugden

The code you supplied seems very straightforward. – Levesque

Have you tried that code? Looks good. What needs to be better about it? – Illiquid

Answer 1

Here is the sample code

*> char[] arr = new char[50];

      int i = 0;
    private void richTextBox1_KeyUp(object sender, KeyEventArgs e)
     {
    if (e.KeyCode == Keys.Space)            {
        string str = new string(arr); 
        MessageBox.Show(str);
        Array.Clear(arr, 0, arr.Length);
        i = 0;
    }
    else if (e.KeyCode == Keys.Back)
       {
        i--;
        if (i < 0)
        {
            i = 0;
        }
        arr[i] = ' ';


    }

    else
    {
        arr[i] = (char)e.KeyValue;

        i++;
    }
    }*

This is how you will be able to extract the latest word. Now color yourself the word you like.

Novocaine

Answer 2

Well, if you really are just looking to get the last word, you could do something like this...Assuming of course, that you make a string equal to the text of your rich text box.

string str="hello, how are you doing?";
if (str.Length >0)
{
    int index=str.LastIndexOf(" ") + 1;
    str = str.Substring(index));
}

Then just return the string, and do what you need to do with it.

Reliable

This won't help him color that word, and also won't work if the last word is in a paragraph of its own. – Levesque

how does this have anything to do with a rich text box in c# – Plasmosome

Answer 3

As I remember rich text box can render text as HTML.
Just wrap your last word in font tag and that's it.

Masonmasonic

extract the last word is the question, not how to color a word – Plasmosome