共用方式為

IDbCommandInterceptor.CommandCreating 方法

  • 參考

定義

命名空間:
Microsoft.EntityFrameworkCore.Diagnostics
組件:
Microsoft.EntityFrameworkCore.Relational.dll
套件:
Microsoft.EntityFrameworkCore.Relational v3.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v3.1.0
套件:
Microsoft.EntityFrameworkCore.Relational v5.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v6.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v7.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v8.0.0

在 EF 想要呼叫 之前呼叫 CreateCommand() 。

public Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand> CommandCreating (Microsoft.EntityFrameworkCore.Diagnostics.CommandCorrelatedEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand> result);
public virtual Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand> CommandCreating (Microsoft.EntityFrameworkCore.Diagnostics.CommandCorrelatedEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand> result);
abstract member CommandCreating : Microsoft.EntityFrameworkCore.Diagnostics.CommandCorrelatedEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand> -> Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand>
abstract member CommandCreating : Microsoft.EntityFrameworkCore.Diagnostics.CommandCorrelatedEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand> -> Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand>
override this.CommandCreating : Microsoft.EntityFrameworkCore.Diagnostics.CommandCorrelatedEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand> -> Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<System.Data.Common.DbCommand>
Public Function CommandCreating (eventData As CommandCorrelatedEventData, result As InterceptionResult(Of DbCommand)) As InterceptionResult(Of DbCommand)
Public Overridable Function CommandCreating (eventData As CommandCorrelatedEventData, result As InterceptionResult(Of DbCommand)) As InterceptionResult(Of DbCommand)

參數

eventData
CommandCorrelatedEventData

命令和執行的相關內容資訊。

result
InterceptionResult<DbCommand>

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 SuppressWithResult(TResult) 來隱藏執行，這個值將會 HasResult 設定為 true 。 這個值通常用來做為這個方法實作的傳回值。

傳回

InterceptionResult<DbCommand>

如果 HasResult 為 false，EF 會如常繼續。 如果 HasResult 為 true，EF 將會隱藏即將執行的作業，並改為使用 Result 。 對於未嘗試變更結果的任何攔截器，這個方法的實作是傳回 result 傳入的值。

適用於