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IConventionPropertyBuilder.IsConcurrencyToken Method

Definition

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);
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

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

Applies to