IConventionPropertyBuilder.IsConcurrencyToken Method

Definition

Namespace:

Microsoft.EntityFrameworkCore.Metadata.Builders

Assembly:

Microsoft.EntityFrameworkCore.dll

Package:

Microsoft.EntityFrameworkCore v8.0.0

Configures whether this property should be used as a concurrency token. When a property is configured as a concurrency token the value in the database will be checked when an instance of this entity type is updated or deleted during SaveChanges() to ensure it has not changed since the instance was retrieved from the database. If it has changed, an exception will be thrown and the changes will not be applied to the database.

public Microsoft.EntityFrameworkCore.Metadata.Builders.IConventionPropertyBuilder? IsConcurrencyToken (bool? concurrencyToken, bool fromDataAnnotation = false);

abstract member IsConcurrencyToken : Nullable<bool> * bool -> Microsoft.EntityFrameworkCore.Metadata.Builders.IConventionPropertyBuilder

Public Function IsConcurrencyToken (concurrencyToken As Nullable(Of Boolean), Optional fromDataAnnotation As Boolean = false) As IConventionPropertyBuilder

Parameters

concurrencyToken

Nullable<Boolean>

A value indicating whether this property is a concurrency token.

fromDataAnnotation

Boolean

Indicates whether the configuration was specified using a data annotation.

Returns

IConventionPropertyBuilder

The same builder instance if the configuration was applied, null otherwise.