DbElementExpression.Accept 方法
定义
重载
| Accept(DbExpressionVisitor) |
为不生成结果值的表达式实现访问者模式。Implements the visitor pattern for expressions that do not produce a result value. |
| Accept<TResultType>(DbExpressionVisitor<TResultType>) |
为生成特定类型的结果值的表达式实现访问者模式。Implements the visitor pattern for expressions that produce a result value of a specific type. |
Accept(DbExpressionVisitor)
为不生成结果值的表达式实现访问者模式。Implements the visitor pattern for expressions that do not produce a result value.
public:
override void Accept(System::Data::Common::CommandTrees::DbExpressionVisitor ^ visitor);
public override void Accept (System.Data.Common.CommandTrees.DbExpressionVisitor visitor);
override this.Accept : System.Data.Common.CommandTrees.DbExpressionVisitor -> unit
Public Overrides Sub Accept (visitor As DbExpressionVisitor)
参数
- visitor
- DbExpressionVisitor
DbExpressionVisitor 的一个实例。An instance of DbExpressionVisitor.
例外
visitor 为 null。visitor is null.
适用于
Accept<TResultType>(DbExpressionVisitor<TResultType>)
为生成特定类型的结果值的表达式实现访问者模式。Implements the visitor pattern for expressions that produce a result value of a specific type.
public:
generic <typename TResultType>
override TResultType Accept(System::Data::Common::CommandTrees::DbExpressionVisitor<TResultType> ^ visitor);
public override TResultType Accept<TResultType> (System.Data.Common.CommandTrees.DbExpressionVisitor<TResultType> visitor);
override this.Accept : System.Data.Common.CommandTrees.DbExpressionVisitor<'ResultType> -> 'ResultType
Public Overrides Function Accept(Of TResultType) (visitor As DbExpressionVisitor(Of TResultType)) As TResultType
类型参数
- TResultType
visitor 生成的结果的类型。The type of the result produced by visitor.
参数
- visitor
- DbExpressionVisitor<TResultType>
生成特定类型结果值的类型化 DbExpressionVisitor 的一个实例。An instance of a typed DbExpressionVisitor that produces a result value of a specific type.
返回
- TResultType
一个由 DbExpressionVisitor 生成的属于特定类型的结果值。A result value of a specific type produced by DbExpressionVisitor.
例外
visitor 为 null。visitor is null.