Specifies how the database generates values for the property. Specifies the inverse of a navigation property.Ĭomplex Types cannot be tracked on their own but they are tracked as part of an entity. Specifies the data type of the database column as rowversion.Īpplied to properties or classes that are to be excluded from database mapping. Specifies that the property is included in concurrency checks. Sets the maximum allowed length of the property value.Ĭreate a table with a specified name in Table attribute for a given domain class.Ĭreate a column with a specified name in Column attribute for a given property in a domain class. Specify a maximum number of characters or bytes for the column that the property should map to. Specify a minimum number of characters or bytes for the column that the property should map to. To make the corresponding column a NOT NULL column in a database table. Specifies that the property is the foreign key in a relationship. ![]() To make the corresponding column a primary pey (PK) column in the database. The mostly used Data Annotations attributes are as follows Attribute NET applications, such as ASP.NET MVC which allows these applications to leverage the same annotations for client-side validations. ![]() Data annotations and the fluent API can be used together, but Code First gives precedence to Fluent API > data annotations > default conventions. The advantage of using Data Annotation feature is that by applying Data Attributes, we can manage the data definition in a single place and do not need re-write the same rules in multiple places. Fluent API is an advanced way of specifying model configuration that covers everything that data annotations can do in addition to some more advanced configuration not possible with data annotations.NET attributes which can be applied to an entity class or properties to override default CodeFirst conventions in EF6 and EF Core. It is used to configure the classes which will highlight the most commonly needed configurations. ![]() NET Framework, data annotation add extra meaning to the data by adding attribute tags.
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