IDbCommandInterceptor.ScalarExecutingAsync Método
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Se llama justo antes de que EF intente llamar ExecuteScalarAsync()a .
public 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 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);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>>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>>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 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 Function ScalarExecutingAsync (command As DbCommand, eventData As CommandEventData, result As InterceptionResult(Of Object), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(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))Parámetros
- command
- DbCommand
El comando.
- eventData
- CommandEventData
Información contextual sobre el comando y la ejecución.
- result
- InterceptionResult<Object>
Representa el resultado actual si existe uno.
Este valor se establecerá HasResulttrue en si algún interceptor anterior suprimió la ejecución mediante una llamada a SuppressWithResult(TResult).
Este valor se usa normalmente como valor devuelto para la implementación de este método.
- cancellationToken
- CancellationToken
Que CancellationToken se debe observar mientras se espera a que se complete la tarea.
Devoluciones
Si HasResult es false, EF continuará como es normal.
Si HasResult es true, EF suprimirá la operación que estaba a punto de realizar y usar Result en su lugar.
Una implementación de este método para cualquier interceptor que no intente cambiar el resultado es devolver el result valor pasado, a menudo usando FromResult<TResult>(TResult)
Excepciones
Si se cancela CancellationToken.
