DbCommandInterceptor.ReaderExecutingAsync Yöntem

Başvuru

Tanım

Ad Alanı:: Microsoft.EntityFrameworkCore.Diagnostics

Bütünleştirilmiş Kod:: Microsoft.EntityFrameworkCore.Relational.dll

Paket:: Microsoft.EntityFrameworkCore.Relational v3.0.0

Paket:: Microsoft.EntityFrameworkCore.Relational v3.1.0

Paket:: Microsoft.EntityFrameworkCore.Relational v5.0.0

Paket:: Microsoft.EntityFrameworkCore.Relational v6.0.0

Paket:: Microsoft.EntityFrameworkCore.Relational v7.0.0

Paket:: Microsoft.EntityFrameworkCore.Relational v8.0.0

Önemli

Bazı bilgiler ürünün ön sürümüyle ilgilidir ve sürüm öncesinde önemli değişiklikler yapılmış olabilir. Burada verilen bilgilerle ilgili olarak Microsoft açık veya zımni hiçbir garanti vermez.

EF çağrısı yapmadan hemen önce çağrılır ExecuteReaderAsync().

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

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

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

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

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

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

Parametreler

command: DbCommand

Komut.

eventData: CommandEventData

Komut ve yürütme hakkında bağlamsal bilgiler.

result: InterceptionResult<DbDataReader>

Varsa geçerli sonucu temsil eder. Önceki bir kesme noktası çağrısı SuppressWithResult(TResult)yaparak yürütmeyi engellediyse bu değer HasResult olarak ayarlanırtrue. Bu değer genellikle bu yöntemin uygulanması için dönüş değeri olarak kullanılır.

cancellationToken: CancellationToken

CancellationToken Görevin tamamlanmasını beklerken gözlemlemek için bir.

Döndürülenler

Task<InterceptionResult<DbDataReader>>

ValueTask<InterceptionResult<DbDataReader>>

False HasResult ise EF normal şekilde devam eder. True HasResult ise, EF gerçekleştirmek üzere olduğu işlemi bastırır ve bunun yerine kullanır Result . Sonucu değiştirmeye çalışmayan herhangi bir kesme noktası için bu yöntemin normal bir uygulaması, genellikle kullanarak geçirilen değeri döndürmektir resultFromResult<TResult>(TResult)

Uygulamalar

ReaderExecutingAsync(DbCommand, CommandEventData, InterceptionResult<DbDataReader>, CancellationToken)

Özel durumlar

OperationCanceledException

CancellationToken İptal edilirse.

Şunlara uygulanır

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