语言

IDbConnectionInterceptor.ConnectionOpeningAsync 方法

定义

在 EF 打算调用之前调用 OpenAsync()。

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);
public 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 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.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>
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>
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>
Public Overridable Function ConnectionOpeningAsync (connection As DbConnection, eventData As ConnectionEventData, result As InterceptionResult, Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of InterceptionResult)
Public Function ConnectionOpeningAsync (connection As DbConnection, eventData As ConnectionEventData, result As InterceptionResult, Optional cancellationToken As CancellationToken = Nothing) As Task(Of InterceptionResult)
Public Function ConnectionOpeningAsync (connection As DbConnection, eventData As ConnectionEventData, result As InterceptionResult, Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of InterceptionResult)

参数

connection
DbConnection

连接。

eventData
ConnectionEventData

有关连接的上下文信息。

result
InterceptionResult

表示当前结果(如果存在)。 如果某些以前的拦截器通过调用取消执行,则此值将设置为 < a0/a0> 。 此值通常用作此方法实现的返回值。

cancellationToken
CancellationToken

等待任务完成时观察的 A CancellationToken 。

返回

false如果是IsSuppressed,则 EF 将照常继续。 true如果是IsSuppressed,则 EF 将禁止执行该操作。 未尝试禁止操作的任何拦截器的此方法的实现是返回 result 传入的值。

例外

如果取消了该操作 CancellationToken 。

适用于