Validating Strings in Visual Basic 

This section discusses how to validate strings in Visual Basic.

In This Section

• Constructing a Validation Function in Visual Basic
  Discusses the properties of validation functions, and describes how to create and use validation functions.

• How to: Validate File Names and Paths in Visual Basic
  How to determine whether a string represents a file name or path.

• How to: Validate Strings That Represent Dates or Times (Visual Basic)
  How to determine whether a string represents a valid date.

• How to: Validate Strings That Represent E-Mail Addresses (Visual Basic)
  How to determine whether a string represents a valid e-mail address.

• How to: Validate Text for Display in a Web Browser in Visual Basic
  Demonstrates how to ensure that a browser will correctly display text.

• Using Regular Expressions with the MaskedTextBox Control in Visual Basic
  Demonstrates how to convert simple regular expressions to work with the MaskedTextBox control.

• Regular Expressions vs. the Like Operator
  Compares and contrasts the Like operator and regular expressions.

• Walkthrough: Validate That Passwords Are Complex (Visual Basic)
  How to determine whether a string has the characteristics of a strong password.

See Also

Other Resources

Strings in Visual Basic
Parsing Strings in Visual Basic
Search and Replace for Strings in Visual Basic
MaskedTextBox Control (Windows Forms)