Regex designer tool

 

If you want to design and test your regular expressions, you should find any power  utility. There is one – Free Regular Expression Designer.

 

Links

• Free Regular Expression Designer

Percentage Regex

If you need percentage regex for positive percent numbers, you can use this:

• ^0?[0-9]{0,2}(\,[0-9]{1,2})?$|^(100)(\,[0]{1,2})?$

Valid values: 100; 13,1; 001; 002,11; 100; 000; 0

Invalid values:  15.1; 15,x; 101; -2; -0

 

 

Global resources for validations (ASP .NET)

If you want to reuse expressions, error messages etc. for validators, you should use app.config storage or resources.

I will show you how to use resources for storing adjustments of ExpressionValidator .

• Create Global resource directory

  

• Create GlobalResources – Call them ValidationResources.resx
   
• Fill resources by expression and error message

  

• Add meta attribute  with resource resource name into your @Page directive on the page where you want to use resource.

  

• Add RegularExpressionValidator from toolbox and set it to resource values.

  

• If you want you can skip last step and you can set it in the designer

  

• Now run the application and look whats happening

   

Regex – Date validator for DD.MM.YYYY fromat

 

This regex really works.  It is used for validation of DD.MM.YYYY, DD-MM-YYYY date format together with leap year computing.

 

(((0?[1-9]|[12]\d|3[01])[\.\-\/](0?[13578]|1[02])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|((0?[1-9]|[12]\d|30)[\.\-\/](0?[13456789]|1[012])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|((0?[1-9]|1\d|2[0-8])[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|(29[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)|00)))

 

It validates: 10.10.2008, 29.02.2008, 29.02.2008, 2.2.2008, 2-2.2008, 2-2-2008, 30.04.00, 01.1.01

Doesn’t  validate: 29.2.2007, 30.00.00, 0.1.01

Links

• Regexlib where I found it.