HTML Editor Character color help

thanks a lot for all the help i appreciate it.

Hey David,

I'm glad you got it to work. To stop the flashing, add this namespace: "using System.Runtime.Interop;"
Next, Modify your code to look like this:

namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        [DllImport("user32.dll")]
        public static extern bool LockWindowUpdate(IntrPtr hWndLock);

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            try
            {
                LockWindowUpdate(richTextBox1.Handle);

                Regex tags = new Regex("]*>", RegexOptions.IgnoreCase);

                int selPos = richTextBox1.SelectionStart;
                int selLength = richTextBox1.SelectionLength;

                foreach (Match match in tags.Matches(richTextBox1.Text))
                {
                    richTextBox1.Select(match.Index, match.Length);
                    richTextBox1.SelectionColor = Color.Blue;
                    richTextBox1.SelectionStart = selPos;
                    richTextBox1.SelectionLength = selLength;
                    richTextBox1.SelectionColor = Color.Black;
                }
            }
            finally
            {
                 LockWindowUpdate(IntPtr.Zero);
            }
        }
    }
}

Hey,

I figured it out.  Could anyone please tell me how to stop the flickering?  I search for over an hour, but haven't found anything that I understand.

Here is my code so far:

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;
using System.IO;
using System.Text.RegularExpressions;


namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            Regex tags = new Regex("]*>", RegexOptions.IgnoreCase);

            int selPos = richTextBox1.SelectionStart;
            int selLength = richTextBox1.SelectionLength;

            foreach (Match match in tags.Matches(richTextBox1.Text))
            {
                richTextBox1.Select(match.Index, match.Length);
                richTextBox1.SelectionColor = Color.Blue;
                richTextBox1.SelectionStart = selPos;
                richTextBox1.SelectionLength = selLength;
                richTextBox1.SelectionColor = Color.Black;
            }
        }
    }
}

Yes, the foreach loop goes in the text-changed event for the rich text box. The regex can be placed at the top of the class or inside of the text-changed event.

You said you tried that, but it did not work. Could you be more specific? Was there an error? Did the text just not change color? Please post back and I'll try to help.

Hey guys, one more question.  Do I put the regex and foreach code in this section?

private void richTextBox1_TextChanged(object sender, EventArgs e)
        {

        }

I tried that and it didn't work.  Please let me know.

Try this:

Regex tags = new Regex("]*>"), RegexOptions.IgnoreCase;

int selPos = richTexBox1.SelectionStart;
int selLength = richTextBox1.SelectionLength;

foreach (Match match in tags.Matches(richTextBox1.Text))
{
    richTextBox1.Select(match.Index, match.Length);
    richTextBox1.SelectionColor = Color.Blue;
    richTextBox1.SelectionStart = selPos;
    richTextox1.SelectionLength = selLength;
    richTextBox1.SelectionColor = Color.Black;
}

This uses regex to find a matches (any code inside of a "<" and ">") and colors it. You may notice some flashing. To stop this you'll need to stop the rich text box from updating.

Hope this helps.

no help yet? sorry i'm really anxious