Solved

RichTextBox Control  population

Posted on 2014-03-24
3
294 Views
Last Modified: 2014-03-25
How do you place a null  into a RichTextBox control?
0
Comment
Question by:metro156
  • 2
3 Comments
 
LVL 40
ID: 39952235
Define what you see as a null. A database null or a code null? A null character or a completely empty RichTextBox? And what language are you using, VB or C#?

If you mean to empty the RTB, then the following should do it:

RichTextBox1.Text = Nothing ' VB
RichTextBox1.Text = null; // C#

But depending on the use, since Text is a string, and since a string can both be empty and have a value of String.Empty, it might not be considered as null, depending on how you use it.

Please, give more information about what you mean by "a  null  into a RichTextBox control", as well as how you intend to use this value, and we should be able to give you a more precise answer.
0
 

Author Comment

by:metro156
ID: 39952855
I need to put a null value into a column of a sql server database table via the RichTextBox.


Using C#.
0
 
LVL 40

Accepted Solution

by:
Jacques Bourgeois (James Burger) earned 500 total points
ID: 39953166
How do you send your update to the server?

To send a null value to the server, you need to use DBNull.Value, which cannot be stored in a RichTextBox because it cannot be converted to a String.

Thus the null cannot come directly from the control. You will have to detect the fact that the control is empty and send a DBNull.Value instead to the database.

An alternative is not to accept null in the database, and consider an empty string as your null value for that field.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

If you have ever found yourself doing a repetitive action with the mouse and keyboard, and if you have even a little programming experience, there is a good chance that you can use a text editor to whip together a sort of macro to automate the proce…
Entering time in Microsoft Access can be difficult. An input mask often bothers users more than helping them and won't catch all typing errors. This article shows how to create a textbox for 24-hour time input with full validation politely catching …
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

792 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question