contentsRichTextBox not recognized

Mark P. · May 9th, 2011, 01:36 PM

I downloaded the code for Ex6-5 so I could work through the Tryit for Chapter 7. When I try and replace the MessageBox.Show("Undo"); line with contentsRichTextBox.Undo(); on Step by Step 2., I get an error that says the new entry does not exist. Any idea what might be going on? All I get from IntelliSense for content is ContentAlignment, and ContentsResized.

Rod Stephens · May 9th, 2011, 02:17 PM

Sorry about that. I think the control was named rchDocument in Exercise 6-5. We renamed a bunch of controls to give them a more consistent naming format and that one must have been missed.

The best solution is to use the Forms editor to rename the RichTextBox control from rchDocument to contentsRichTextBox. (Alternatively you could change the name in the code, but it would be better to rename the control.)

Let me know if you have more trouble with it.

Mark P. · May 9th, 2011, 02:22 PM

Rod, so would the syntax you are suggesting be contentsrchDocument.Undo();?

Rod Stephens · May 9th, 2011, 02:54 PM

Hi Mark,

If the control is named rchDocument (which I think it is), then the syntax would be:

rchDocument.Undo();

If you change the control's name to contentsRichTextBox, then the code would be:

contentsRichTextBox.Undo();

Basically it's whatever the control's name is followed by ".Undo();"

When you start typing "contents," IntelliSense should list the control.

If you can't remember the control's name (for example, in a larger program that you haven't looked at for a while), try typing "RichTextBox" and see if IntelliSense can list it for you.

Keep me posted.

Mark P. · May 9th, 2011, 03:01 PM

Rod, just changing the line to match rchDocument worked, thanks for you help, and congrats. on writing a very useful book also.

Rod Stephens · May 9th, 2011, 03:02 PM

Glad I could help. Sorry to have confused the issue to begin with.

Let me know if you have other problems with the book.