DbCommandInterceptor.ReaderExecutingAsync Metode

Referensi

Definisi

Ruang nama:: Microsoft.EntityFrameworkCore.Diagnostics

Rakitan:: 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

Penting

Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.

Dipanggil tepat sebelum EF berniat untuk memanggil 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))

Parameter

command: DbCommand

Perintah.

eventData: CommandEventData

Informasi kontekstual tentang perintah dan eksekusi.

result: InterceptionResult<DbDataReader>

Mewakili hasil saat ini jika ada. Nilai ini akan diatur HasResult ke true jika beberapa pencegat sebelumnya menekan eksekusi dengan memanggil SuppressWithResult(TResult). Nilai ini biasanya digunakan sebagai nilai pengembalian untuk implementasi metode ini.

cancellationToken: CancellationToken

A CancellationToken untuk mengamati sambil menunggu tugas selesai.

Mengembalikan

Task<InterceptionResult<DbDataReader>>

ValueTask<InterceptionResult<DbDataReader>>

Jika HasResult false, EF akan berlanjut seperti biasa. Jika HasResult benar, maka EF akan menekan operasi yang akan dilakukan dan digunakan Result sebagai gantinya. Implementasi normal dari metode ini untuk setiap pencegat yang tidak mencoba mengubah hasilnya adalah mengembalikan nilai yang result diteruskan, sering menggunakan FromResult<TResult>(TResult)

Penerapan

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

Pengecualian

OperationCanceledException

CancellationToken Jika dibatalkan.

Berlaku untuk

Bagikan melalui