Introduction to MVC Attribute notmapped DisplayName Required, etc.

Each attribute is added to its own attribute to constrain the attribute, and in an ideal state, our interface does not even have to manually add descriptive text for the property

When using attribute, you need to introduce the following namespaces

using System.ComponentModel; using System.ComponentModel.DataAnnotations;

Common attribute

Required:	Specified as a required field, that is, the column corresponding to the specified database does not allow null values
Stringlength:	Specifies the length range of the field, minimum length
Notmapped:	There is no corresponding relationship, that is, this field does not generate the corresponding column in the database
Key:	Specify the primary key field in the corresponding database
DisplayName:	Name of the property display
DataType:	Specifies the name of the additional type to associate with the data field, with an enumeration named datatype that specifies the data type and creates a corresponding validation rule and build method for it

Reproduced

Common attribute

Required:	Specified as a required field, that is, the column corresponding to the specified database does not allow null values
Stringlength:	Specifies the length range of the field, minimum length
Notmapped:	There is no corresponding relationship, that is, this field does not generate the corresponding column in the database
Key:	Specify the primary key field in the corresponding database
DisplayName:	Name of the property display
DataType:	Specifies the name of the additional type to associate with the data field, with an enumeration named datatype that specifies the data type and creates a corresponding validation rule and build method for it

Introduction to MVC Attribute notmapped DisplayName Required, etc.