共用方式為


DbConnectionInterceptor.ConnectionOpeningAsync 方法

定義

在 EF 想要呼叫 之前呼叫 OpenAsync()

public virtual System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult> ConnectionOpeningAsync (System.Data.Common.DbConnection connection, Microsoft.EntityFrameworkCore.Diagnostics.ConnectionEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult result, System.Threading.CancellationToken cancellationToken = default);
public virtual System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult> ConnectionOpeningAsync (System.Data.Common.DbConnection connection, Microsoft.EntityFrameworkCore.Diagnostics.ConnectionEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult result, System.Threading.CancellationToken cancellationToken = default);
abstract member ConnectionOpeningAsync : System.Data.Common.DbConnection * Microsoft.EntityFrameworkCore.Diagnostics.ConnectionEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult>
override this.ConnectionOpeningAsync : System.Data.Common.DbConnection * Microsoft.EntityFrameworkCore.Diagnostics.ConnectionEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult>
abstract member ConnectionOpeningAsync : System.Data.Common.DbConnection * Microsoft.EntityFrameworkCore.Diagnostics.ConnectionEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult>
override this.ConnectionOpeningAsync : System.Data.Common.DbConnection * Microsoft.EntityFrameworkCore.Diagnostics.ConnectionEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult>
Public Overridable Function ConnectionOpeningAsync (connection As DbConnection, eventData As ConnectionEventData, result As InterceptionResult, Optional cancellationToken As CancellationToken = Nothing) As Task(Of InterceptionResult)
Public Overridable Function ConnectionOpeningAsync (connection As DbConnection, eventData As ConnectionEventData, result As InterceptionResult, Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of InterceptionResult)

參數

connection
DbConnection

連接。

eventData
ConnectionEventData

連線的相關內容資訊。

result
InterceptionResult

如果存在,則表示目前的結果。 如果某些先前的攔截器藉由呼叫 Suppress() 來隱藏執行,這個值將會 IsSuppressed 設定 true 為 。 這個值通常用來作為這個方法實作的傳回值。

cancellationToken
CancellationToken

等候 CancellationToken 工作完成時要觀察的 。

傳回

如果 IsSuppressed 為 false,EF 會如常繼續。 如果 IsSuppressed 為 true,EF 將會隱藏即將執行的作業。 任何未嘗試隱藏作業的攔截器,這個方法的一般實作是傳回 result 傳入的值。

實作

例外狀況

適用於