Regular Expression Examples

This section contains code examples that illustrate the use of regular expressions in common applications.

In This Section

• Scanning for HREFS
  Provides an example that searches an input string and prints out all the href="..." values and their locations in the string.
• Changing Date Formats
  Provides an example that replaces dates of the form mm/dd/yy with dates of the form dd-mm-yy.
• Extracting URL Information
  Provides an example that extracts a protocol and port number from a string containing a URL. For example, "https://www.contoso.com:8080/letters/readme.html" returns "http:8080".
• Cleaning an Input String
  provides an example that strips invalid non-alphanumeric characters from a string.
• Confirming Valid E-Mail Format
  Provides an example that you can use to verify that a string is in valid e-mail format.

Related Sections

• Regular Expressions as a Language
  Provides an overview of the programming-language aspect of regular expressions.
• Regular Expression Classes
  Describes the regular expression classes contained in the System.Text.RegularExpression namespace and provides examples of their use.
• Details of Regular Expression Behavior
  Provides information about the capabilities and behavior of .NET Framework regular expressions.
• Regular Expression Language Elements
  Provides information on the set of characters, operators, and constructs that you can use to define regular expressions.
• System.Text.RegularExpressions
  Provides class-library reference information for the .NET Framework System.Text.RegularExpressions namespace