CoreLoggerExtensions.QueryCompilationStarting 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Diagnostics

程序集:

Microsoft.EntityFrameworkCore.dll

包:

Microsoft.EntityFrameworkCore v9.0.0

重载

QueryCompilationStarting(IDiagnosticsLogger<DbLoggerCategory.Query>, DbContext, ExpressionPrinter, Expression)

QueryCompilationStarting事件的日志。

QueryCompilationStarting(IDiagnosticsLogger<DbLoggerCategory.Query>, DbContext, ExpressionPrinter, Expression)

Source:

CoreLoggerExtensions.cs

QueryCompilationStarting事件的日志。

public static (System.Linq.Expressions.Expression Query, Microsoft.EntityFrameworkCore.Diagnostics.QueryExpressionEventData? EventData) QueryCompilationStarting (this Microsoft.EntityFrameworkCore.Diagnostics.IDiagnosticsLogger<Microsoft.EntityFrameworkCore.DbLoggerCategory.Query> diagnostics, Microsoft.EntityFrameworkCore.DbContext? context, Microsoft.EntityFrameworkCore.Query.ExpressionPrinter expressionPrinter, System.Linq.Expressions.Expression queryExpression);

static member QueryCompilationStarting : Microsoft.EntityFrameworkCore.Diagnostics.IDiagnosticsLogger<Microsoft.EntityFrameworkCore.DbLoggerCategory.Query> * Microsoft.EntityFrameworkCore.DbContext * Microsoft.EntityFrameworkCore.Query.ExpressionPrinter * System.Linq.Expressions.Expression -> ValueTuple<System.Linq.Expressions.Expression, Microsoft.EntityFrameworkCore.Diagnostics.QueryExpressionEventData>

<Extension()>
Public Function QueryCompilationStarting (diagnostics As IDiagnosticsLogger(Of DbLoggerCategory.Query), context As DbContext, expressionPrinter As ExpressionPrinter, queryExpression As Expression) As ValueTuple(Of Expression, QueryExpressionEventData)

参数

diagnostics

IDiagnosticsLogger<DbLoggerCategory.Query>

要使用的诊断记录器。

context

DbContext

当前 DbContext，如果未知，则为 。null

expressionPrinter

ExpressionPrinter

用于创建表达式树的可读表示形式。

queryExpression

Expression

查询表达式树。

返回

ValueTuple<Expression,QueryExpressionEventData>

查询表达式和事件数据。