Murach's Visual Basic 2005
How to handle exceptions and validate data

First, this chapter shows you how to use structured exception handling so you can create bulletproof applications. Then, it shows you the best ways to validate the data that the user enters so exceptions are avoided. Frankly, this is the best material on data validation that we've ever seen.

Chapter 7 How to handle exceptions and validate data
An introduction to data validation and exception handling 186
How to use the IsNumeric function for data validation 186
How to display a dialog box for error messages 188
How exception handling works 190
How to use structured exception handling 192
How to catch an exception 192
How to use the properties and methods of an exception 194
How to catch specific types of exceptions 196
How to throw an exception 198
The Future Value application with exception handling 200
How to validate data 202
How to validate a single entry 202
How to use generic procedures to validate an entry 204
How to validate multiple entries 206
The Future Value application with data validation 208
The dialog boxes 208
The code 208
Two other ways to validate data 212
How to use the Validating event 212
How to use the masked text box 214


© Copyright 1998-2008 Mike Murach & Associates, Inc.  All rights reserved.

Murach's VB 2005

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