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changing forecolor on a rich text box

Posted on 2014-02-28
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Last Modified: 2014-03-03
hi - I want to update a rich text box with data that has some characters color changed from black to red. is this possible using a RTB? the application involves showing the user by a change in color that certain text values have changed from one pass of the data to the next pass.
if it's not possible with a RTB, is there another approach I can take?
what I'm doing now is below (it doesn't work):

for (int k = 1; k < tempReply[0] + 1; k++)
                        {
                            if (totalBytes++ < size)
                            {
                                if (oldVars[k] != tempReply[k + 1] && !firstTime)                               
                                    displayVars_TB.ForeColor =  Color.Red;                                                                
                                else
                                    displayVars_TB.ForeColor = Color.Black;

                                Application.DoEvents();
                                displayVars_TB.AppendText( tempReply[k].ToString("X2") + " ");
                                Application.DoEvents();
                            }
                            else
                                break;
                           
                        }

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thanks,
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Question by:jdcoburn
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2 Comments
 
LVL 86

Accepted Solution

by:
Mike Tomlinson earned 2000 total points
ID: 39895825
Sure it's possible.

Just move your SelectionStart() to the end of the RichTextBox, set the SelectionColor(), then call AppendText():
            for (int k = 1; k < tempReply[0] + 1; k++)
            {
                if (totalBytes++ < size)
                {
                    displayVars_TB.SelectionStart = displayVars_TB.TextLength;
                    if (oldVars[k] != tempReply[k + 1] && !firstTime)
                        displayVars_TB.SelectionColor = Color.Red;
                    else
                        displayVars_TB.SelectionColor = Color.Black;
                    displayVars_TB.AppendText(tempReply[k].ToString("X2") + " ");
                    Application.DoEvents();
                }
                else
                    break;
            }

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0
 

Author Closing Comment

by:jdcoburn
ID: 39902247
thank you, nicely done.
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