C# Model Validation Attribute Cheatsheet

The cheat sheet provides a breakdown of built-in validation attributes in C# with individual code examples for each:

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Built-in Attributes:

• [ValidateNever]: Excludes a property or parameter from validation.
• [CreditCard]: Validates credit card format (requires jQuery Validation Additional Methods).
• [Compare(string otherProperty)]: Validates if the property value matches another property value in the model.
• [EmailAddress]: Validates email address format.
• [Phone]: Validates phone number format.
• [Range(double minimum, double maximum)]: Validates if the property value falls within a specified range (inclusive).
• [RegularExpression(string pattern)]: Validates if the property value matches a specified regular expression.
• [Required]: Ensures the property has a value (not null).
• [StringLength(int maximumLength)]: Validates if the string property value doesn’t exceed the specified length.
• [Url]: Validates URL format.
• [Remote(string action, string controller)]: Performs client-side validation by calling a server-side action method.