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Way back when I designed the software I decided how the UI going to work for textboxes, listboxes, combo boxes, etc.
Also different levels of severity is handled differently.
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kinda weird), especially the Broken Rules architecture.
It's an abstracted way of defining business rules for validation, and telling your application exactly which rules were violated (like leaving a required field blank). html well to validate against null string use the compare method. Compare("")) for more on validating simple data types in your windows forms check out the following post: sttechnet .
by Chris Pels In this video learn how to use the validation controls available in ASP. All the major validation controls such as Required Field Validator and Regular Expression Validator will be discussed.
In addition, learn how to use the Custom Validator when one of the standard validators does not meet your need.
The part before the @ sign is the local part of the address, and the part after the @ sign is a domain name to which the email message will be sent . The pattern parameter consists of various regular expression language elements that symbolically describe the string to match pattern .