Lingua

DbCommandInterceptor.ReaderExecutingAsync Metodo

Definizione

Spazio dei nomi:
Microsoft.EntityFrameworkCore.Diagnostics
Assembly:
Microsoft.EntityFrameworkCore.Relational.dll
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v10.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v11.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v3.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v3.1.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v5.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v6.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v7.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v8.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v9.0.0
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs
Origine:
DbCommandInterceptor.cs

Chiamato appena prima di EF intende chiamare ExecuteReaderAsync().

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);
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);
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>>
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>>
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))
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))

Parametri

command
DbCommand

Comando .

eventData
CommandEventData

Informazioni contestuali sul comando e sull'esecuzione.

result
InterceptionResult<DbDataReader>

Rappresenta il risultato corrente, se presente. Questo valore sarà HasResult impostato su true se un precedente intercettore ha eliminato l'esecuzione chiamando SuppressWithResult(TResult). Questo valore viene in genere usato come valore restituito per l'implementazione di questo metodo.

cancellationToken
CancellationToken

Oggetto CancellationToken da osservare durante l'attesa del completamento dell'attività.

Valori restituiti

ValueTask<InterceptionResult<DbDataReader>>
Task<InterceptionResult<DbDataReader>>

Se HasResult è false, Entity Framework continuerà come di consueto. Se HasResult è true, Entity Framework elimina l'operazione che sta per eseguire e usare Result . Una normale implementazione di questo metodo per qualsiasi intercettore che non tenta di modificare il risultato consiste nel restituire il result valore passato, spesso usando FromResult<TResult>(TResult)

Implementazioni

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

Eccezioni

OperationCanceledException

Se l'oggetto CancellationToken viene annullato.

Si applica a