I need to implement a regular expression validation that allows a-z A-z 0-9 and some special characters _ - . @ &
But should restrict
\ / " : ; * ? " < > { } [ ] ( ) | ! ' % ^
tried this pattern but doesn't work.
[Required]
[Display(Name = "User name")]
[RegularExpression("^[-a-zA-Z0-9_-@]*", ErrorMessage = "Invalid characters!")]
public string UserName { get; set; }
Could you please suggest?
In regex hyphen has a special meaning in Character class that is used to define the range. It should be escaped or put it in the beginning or ending of the set.
Try
[-\w.@&]
Here \w match any word character [a-zA-Z0-9_]
To validate the whole string use ^ and $ to match start and end of the string respectively.
To avoid blank string try + instead of * like ^[-\w.@&]+$
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