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System.ComponentModel.DataAnnotations Namespace

.NET Framework 4.5

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

The System.ComponentModel.DataAnnotations namespace provides attribute classes that are used to define metadata for ASP.NET MVC and ASP.NET data controls.

  Class Description
Public class AssociatedMetadataTypeTypeDescriptionProvider Extends the metadata information for a class by adding attributes and property information that is defined in an associated class.
Public class AssociationAttribute Specifies that an entity member represents a data relationship, such as a foreign key relationship.
Public class CompareAttribute Provides an attribute that compares two properties.
Public class ConcurrencyCheckAttribute Specifies that a property participates in optimistic concurrency checks.
Public class CreditCardAttribute Specifies that a data field value is a credit card number.
Public class CustomValidationAttribute Specifies a custom validation method that is used to validate a property or class instance.
Public class DataTypeAttribute Specifies the name of an additional type to associate with a data field.
Public class DisplayAttribute Provides a general-purpose attribute that lets you specify localizable strings for types and members of entity partial classes.
Public class DisplayColumnAttribute Specifies the column that is displayed in the referred table as a foreign-key column.
Public class DisplayFormatAttribute Specifies how data fields are displayed and formatted by ASP.NET Dynamic Data.
Public class EditableAttribute Indicates whether a data field is editable.
Public class EmailAddressAttribute Validates an email address.
Public class EnumDataTypeAttribute Enables a .NET Framework enumeration to be mapped to a data column.
Public class FileExtensionsAttribute Validates file name extensions.
Public class FilterUIHintAttribute Represents an attribute that is used to specify the filtering behavior for a column.
Public class KeyAttribute Denotes one or more properties that uniquely identify an entity.
Public class MaxLengthAttribute Specifies the maximum length of array or string data allowed in a property.
Public class MetadataTypeAttribute Specifies the metadata class to associate with a data model class.
Public class MinLengthAttribute Specifies the minimum length of array of string data allowed in a property.
Public class PhoneAttribute Specifies that a data field value is a well-formed phone number using a regular expression for phone numbers.
Public class RangeAttribute Specifies the numeric range constraints for the value of a data field.
Public class RegularExpressionAttribute Specifies that a data field value in ASP.NET Dynamic Data must match the specified regular expression.
Public class RequiredAttribute Specifies that a data field value is required.
Public class ScaffoldColumnAttribute Specifies whether a class or data column uses scaffolding.
Public class ScaffoldTableAttribute Specifies whether a class or data table uses scaffolding.
Public class StringLengthAttribute Specifies the minimum and maximum length of characters that are allowed in a data field.
Public class TimestampAttribute Specifies the data type of the column as a row version.
Public class UIHintAttribute Specifies the template or user control that Dynamic Data uses to display a data field.
Public class UrlAttribute Provides URL validation.
Public class ValidationAttribute Serves as the base class for all validation attributes.
Public class ValidationContext Describes the context in which a validation check is performed.
Public class ValidationException Represents the exception that occurs during validation of a data field when the ValidationAttribute class is used.
Public class ValidationResult Represents a container for the results of a validation request.
Public class Validator Defines a helper class that can be used to validate objects, properties, and methods when it is included in their associated ValidationAttribute attributes.
  Interface Description
Public interface IValidatableObject Provides a way for an object to be invalidated.
  Enumeration Description
Public enumeration DataType Represents an enumeration of the data types associated with data fields and parameters.
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