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Regular Expressions Sample 

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This sample application shows how to use regular expressions. The main form contains one TabControl with three tab pages.

Security noteSecurity Note

This sample code is provided to illustrate a concept and should not be used in applications or Web sites, as it may not illustrate the safest coding practices. Microsoft assumes no liability for incidental or consequential damages should the sample code be used for purposes other than as intended.

To open the sample file in Solution Explorer

  1. Click Download Sample.

    The File Download message box appears.

  2. Click Open, and on the left column of the zip folder window, click Extract all files.

    The Extraction Wizard opens.

  3. Click Next. You can change the directory that the files will be extracted to, and then click Next again.

  4. Make sure that the Show extracted files check box is selected, and click Finish.

  5. Double-click the sample's .sln file.

    The sample solution is displayed in Solution Explorer. You might get a security warning that says the solution location is not trusted. Click OK to continue.

To run this sample

  • Press F5.


A connection to the Internet is required for the screen-scraping feature of the sample.


This sample application shows how to use regular expressions.The tab pages demonstrate:

  • Basic parsing techniques   This tab page uses the Regex class to find numbers in a string, and valid zip codes, email addresses, and dates.

  • Screen-scraping   This tab shows a more advanced use of regular expressions. You can enter a Web address and view the links or images contained in it. HTML tag attributes are displayed in a ListView control. You can double-click an image to view it, or double-click a link to open Internet Explorer and view the page.

  • Testing   This tab provides a convenient way to experiment with regular expressions. It also demonstrates how to do search and replace and string splitting.

See Also

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