IRelationalCommand.ExecuteScalarAsync Método

Definición

Sobrecargas

ExecuteScalarAsync(RelationalCommandParameterObject, CancellationToken)

Ejecuta de forma asincrónica el comando con un único resultado escalar.

ExecuteScalarAsync(IRelationalConnection, IReadOnlyDictionary<String,Object>, CancellationToken)

Ejecuta de forma asincrónica el comando con un único resultado escalar.

ExecuteScalarAsync(IRelationalConnection, IReadOnlyDictionary<String,Object>, Boolean, CancellationToken)
Obsoletos.

Ejecuta de forma asincrónica el comando con un único resultado escalar.

ExecuteScalarAsync(RelationalCommandParameterObject, CancellationToken)

Ejecuta de forma asincrónica el comando con un único resultado escalar.

public System.Threading.Tasks.Task<object> ExecuteScalarAsync (Microsoft.EntityFrameworkCore.Storage.RelationalCommandParameterObject parameterObject, System.Threading.CancellationToken cancellationToken = default);
public System.Threading.Tasks.Task<object?> ExecuteScalarAsync (Microsoft.EntityFrameworkCore.Storage.RelationalCommandParameterObject parameterObject, System.Threading.CancellationToken cancellationToken = default);
abstract member ExecuteScalarAsync : Microsoft.EntityFrameworkCore.Storage.RelationalCommandParameterObject * System.Threading.CancellationToken -> System.Threading.Tasks.Task<obj>
Public Function ExecuteScalarAsync (parameterObject As RelationalCommandParameterObject, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Object)

Parámetros

parameterObject
RelationalCommandParameterObject

Parámetros para este método.

cancellationToken
CancellationToken

Que CancellationToken se debe observar mientras se espera a que se complete la tarea.

Devoluciones

Tarea que representa la operación asincrónica. El resultado de la tarea contiene el resultado del comando.

Excepciones

Se aplica a

ExecuteScalarAsync(IRelationalConnection, IReadOnlyDictionary<String,Object>, CancellationToken)

Ejecuta de forma asincrónica el comando con un único resultado escalar.

public System.Threading.Tasks.Task<object> ExecuteScalarAsync (Microsoft.EntityFrameworkCore.Storage.IRelationalConnection connection, System.Collections.Generic.IReadOnlyDictionary<string,object> parameterValues, System.Threading.CancellationToken cancellationToken = default);
abstract member ExecuteScalarAsync : Microsoft.EntityFrameworkCore.Storage.IRelationalConnection * System.Collections.Generic.IReadOnlyDictionary<string, obj> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<obj>
Public Function ExecuteScalarAsync (connection As IRelationalConnection, parameterValues As IReadOnlyDictionary(Of String, Object), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Object)

Parámetros

connection
IRelationalConnection

Conexión con la que se va a ejecutar.

parameterValues
IReadOnlyDictionary<String,Object>

Valores de los parámetros.

cancellationToken
CancellationToken

Que CancellationToken se debe observar mientras se espera a que se complete la tarea.

Devoluciones

Tarea que representa la operación asincrónica. El resultado de la tarea contiene el resultado del comando.

Se aplica a

ExecuteScalarAsync(IRelationalConnection, IReadOnlyDictionary<String,Object>, Boolean, CancellationToken)

Precaución

Use overload without 'manageConnection' parameter

Ejecuta de forma asincrónica el comando con un único resultado escalar.

public System.Threading.Tasks.Task<object> ExecuteScalarAsync (Microsoft.EntityFrameworkCore.Storage.IRelationalConnection connection, System.Collections.Generic.IReadOnlyDictionary<string,object> parameterValues = default, bool manageConnection = true, System.Threading.CancellationToken cancellationToken = default);
[System.Obsolete("Use overload without 'manageConnection' parameter")]
public System.Threading.Tasks.Task<object> ExecuteScalarAsync (Microsoft.EntityFrameworkCore.Storage.IRelationalConnection connection, System.Collections.Generic.IReadOnlyDictionary<string,object> parameterValues, bool manageConnection, System.Threading.CancellationToken cancellationToken = default);
abstract member ExecuteScalarAsync : Microsoft.EntityFrameworkCore.Storage.IRelationalConnection * System.Collections.Generic.IReadOnlyDictionary<string, obj> * bool * System.Threading.CancellationToken -> System.Threading.Tasks.Task<obj>
[<System.Obsolete("Use overload without 'manageConnection' parameter")>]
abstract member ExecuteScalarAsync : Microsoft.EntityFrameworkCore.Storage.IRelationalConnection * System.Collections.Generic.IReadOnlyDictionary<string, obj> * bool * System.Threading.CancellationToken -> System.Threading.Tasks.Task<obj>
Public Function ExecuteScalarAsync (connection As IRelationalConnection, Optional parameterValues As IReadOnlyDictionary(Of String, Object) = Nothing, Optional manageConnection As Boolean = true, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Object)
Public Function ExecuteScalarAsync (connection As IRelationalConnection, parameterValues As IReadOnlyDictionary(Of String, Object), manageConnection As Boolean, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Object)

Parámetros

connection
IRelationalConnection

Conexión con la que se va a ejecutar.

parameterValues
IReadOnlyDictionary<String,Object>

Valores de los parámetros.

manageConnection
Boolean

Valor que indica si se va a abrir y cerrar la conexión según sea necesario.

cancellationToken
CancellationToken

Que CancellationToken se debe observar mientras se espera a que se complete la tarea.

Devoluciones

Tarea que representa la operación asincrónica. El resultado de la tarea contiene el resultado del comando.

Atributos

Se aplica a