What is Data Annotation Validator Attribute in asp.net MVC?

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Steilla Mitchel · Answer

Data Annotation in MVC:
and  and  There are mazor role of Data Annotation in asp.net mvc. It is used to validate the properties when designing the model page. This validation is used in both side, client side as well as server side. There are some Data Annotation used in mvc is given below,
Required :and 
and  and  It is used to specify a property as required.
exp.and [Required(ErrorMessage='Full Name is Required')]
RegularExpression 
It is used to specifies the regular expression to validate the value of the property.
exp. -and [RegularExpression('[a-z]', ErrorMessage = 'Invalid input characters')]
Range :
It specifies the Range of values which provide this property
exp. -and [Range(100,1000,ErrorMessage='Enter value between 100 to 1k')]
StringLength :
Specifies the Min length and Max length for a given string property. 
exp.-and [StringLength(50, MinimumLength = 4, ErrorMessage = 'Enter value between 4 and 50 characters ')]
MaxLength :
Specifies the Max length for the entered property value. 
exp.-and [MaxLength(50,ErrorMessage='Enter value less than 50 characters')]
MinLength :
It is used to check for minimum length of property value. 
exp.-and [MinLength(4, ErrorMessage = 'Name is too small, enter more than 4 characters')].

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What is Data Annotation Validator Attribute in asp.net MVC?

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