DbCommandInterceptor.ScalarExecutingAsync Método

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Chamado pouco antes do EF pretende chamar ExecuteScalarAsync().

public virtual System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<object>> ScalarExecutingAsync (System.Data.Common.DbCommand command, Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<object> result, System.Threading.CancellationToken cancellationToken = default);

public virtual System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<object>> ScalarExecutingAsync (System.Data.Common.DbCommand command, Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<object> result, System.Threading.CancellationToken cancellationToken = default);

abstract member ScalarExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj>>
override this.ScalarExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj>>

abstract member ScalarExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj>>
override this.ScalarExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<obj>>

Public Overridable Function ScalarExecutingAsync (command As DbCommand, eventData As CommandEventData, result As InterceptionResult(Of Object), Optional cancellationToken As CancellationToken = Nothing) As Task(Of InterceptionResult(Of Object))

Public Overridable Function ScalarExecutingAsync (command As DbCommand, eventData As CommandEventData, result As InterceptionResult(Of Object), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of InterceptionResult(Of Object))

Parâmetros

command: DbCommand

O comando.

eventData: CommandEventData

Informações contextuais sobre o comando e a execução.

result: InterceptionResult<Object>

Representa o resultado atual se houver um. Esse valor terá HasResult definido como true se algum interceptador anterior suprimiu a execução chamando SuppressWithResult(TResult). Esse valor normalmente é usado como o valor retornado para a implementação desse método.

cancellationToken: CancellationToken

Um CancellationToken a ser observado enquanto aguarda a conclusão da tarefa.

Retornos

Task<InterceptionResult<Object>>

ValueTask<InterceptionResult<Object>>

Se HasResult for false, o EF continuará normalmente. Se HasResult for true, o EF suprimirá a operação que estava prestes a executar e usar Result . Uma implementação normal desse método para qualquer interceptador que não esteja tentando alterar o resultado é retornar o result valor passado, muitas vezes usando FromResult<TResult>(TResult)

Implementações

ScalarExecutingAsync(DbCommand, CommandEventData, InterceptionResult<Object>, CancellationToken)

Exceções

OperationCanceledException

Se o padrão CancellationToken for cancelado.

Aplica-se a

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