RelationalCommandExtensions.ExecuteScalarAsync 方法

定義

命名空間:

Microsoft.EntityFrameworkCore.Storage

組件:

Microsoft.EntityFrameworkCore.Relational.dll

套件:

Microsoft.EntityFrameworkCore.Relational v2.2.6

以非同步方式執行具有單一純量結果的命令。

public static System.Threading.Tasks.Task<object> ExecuteScalarAsync (this Microsoft.EntityFrameworkCore.Storage.IRelationalCommand command, Microsoft.EntityFrameworkCore.Storage.IRelationalConnection connection, System.Threading.CancellationToken cancellationToken = default);

static member ExecuteScalarAsync : Microsoft.EntityFrameworkCore.Storage.IRelationalCommand * Microsoft.EntityFrameworkCore.Storage.IRelationalConnection * System.Threading.CancellationToken -> System.Threading.Tasks.Task<obj>

<Extension()>
Public Function ExecuteScalarAsync (command As IRelationalCommand, connection As IRelationalConnection, Optional cancellationToken As CancellationToken = Nothing) As Task(Of Object)

參數

command

IRelationalCommand

要執行的命令。

connection

IRelationalConnection

要對其執行的連線。

cancellationToken

CancellationToken

CancellationToken等候工作完成時要觀察的 。

傳回

Task<Object>

代表非同步作業的工作。 工作結果包含命令的結果。