IDbCommandInterceptor.NonQueryExecutingAsync 方法
定义
重要
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在 EF 打算调用 之前调用 ExecuteNonQueryAsync()。
public System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int>> NonQueryExecutingAsync (System.Data.Common.DbCommand command, Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int> result, System.Threading.CancellationToken cancellationToken = default);public System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int>> NonQueryExecutingAsync (System.Data.Common.DbCommand command, Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int> result, System.Threading.CancellationToken cancellationToken = default);public virtual System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int>> NonQueryExecutingAsync (System.Data.Common.DbCommand command, Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData eventData, Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int> result, System.Threading.CancellationToken cancellationToken = default);abstract member NonQueryExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int>>abstract member NonQueryExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int>>abstract member NonQueryExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int>>
override this.NonQueryExecutingAsync : System.Data.Common.DbCommand * Microsoft.EntityFrameworkCore.Diagnostics.CommandEventData * Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<Microsoft.EntityFrameworkCore.Diagnostics.InterceptionResult<int>>Public Function NonQueryExecutingAsync (command As DbCommand, eventData As CommandEventData, result As InterceptionResult(Of Integer), Optional cancellationToken As CancellationToken = Nothing) As Task(Of InterceptionResult(Of Integer))Public Function NonQueryExecutingAsync (command As DbCommand, eventData As CommandEventData, result As InterceptionResult(Of Integer), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of InterceptionResult(Of Integer))Public Overridable Function NonQueryExecutingAsync (command As DbCommand, eventData As CommandEventData, result As InterceptionResult(Of Integer), Optional cancellationToken As CancellationToken = Nothing) As ValueTask(Of InterceptionResult(Of Integer))参数
- command
- DbCommand
命令。
- eventData
- CommandEventData
有关命令和执行的上下文信息。
- result
- InterceptionResult<Int32>
表示当前结果（如果存在）。
如果某个以前的侦听器通过调用 SuppressWithResult(TResult)来禁止执行，则此值将HasResult设置为 true 。
此值通常用作此方法实现的返回值。
- cancellationToken
- CancellationToken
等待 CancellationToken 任务完成时要观察的 。
返回
如果 HasResult 为 false，EF 将照常继续。
如果 HasResult 为 true，则 EF 将取消它要执行的操作并改为使用 Result 。
对于任何不尝试更改结果的侦听器，此方法的实现是返回 result 传入的值，通常使用 FromResult<TResult>(TResult)
