DbCommandInterceptor.ScalarExecutingAsync 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

EF çağrısı yapmadan hemen önce çağrılır 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))

Parametreler

command
DbCommand

Komut.

eventData
CommandEventData

Komut ve yürütme hakkında bağlamsal bilgiler.

result
InterceptionResult<Object>

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<Object>>
ValueTask<InterceptionResult<Object>>

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

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

Özel durumlar

OperationCanceledException

CancellationToken İptal edilirse.

Şunlara uygulanır