Articolo
11/18/2011

ExpressionVisitor Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Represents a visitor or rewriter for expression trees.

Inheritance Hierarchy

System.Object
System.Linq.Expressions.ExpressionVisitor

Namespace: System.Linq.Expressions
Assembly: System.Core (in System.Core.dll)

Syntax

'Declaration
Public MustInherit Class ExpressionVisitor

public abstract class ExpressionVisitor

The ExpressionVisitor type exposes the following members.

Constructors

	Name	Description
	ExpressionVisitor	Initializes a new instance of ExpressionVisitor.

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Visit(Expression)	Dispatches the expression to one of the more specialized visit methods in this class.
	Visit(ReadOnlyCollection<Expression>)	Dispatches the list of expressions to one of the more specialized visit methods in this class.
	Visit<T>(ReadOnlyCollection<T>, Func<T, T>)	Visits all nodes in the collection using a specified element visitor.
	VisitAndConvert<T>(T, String)	Visits an expression, casting the result back to the original expression type.
	VisitAndConvert<T>(ReadOnlyCollection<T>, String)	Visits an expression, casting the result back to the original expression type.
	VisitBinary	Visits the children of the BinaryExpression.
	VisitBlock	Visits the children of the BlockExpression.
	VisitCatchBlock	Visits the children of the CatchBlock.
	VisitConditional	Visits the children of the ConditionalExpression.
	VisitConstant	Visits the ConstantExpression.
	VisitDebugInfo	Visits the DebugInfoExpression.
	VisitDefault	Visits the DefaultExpression.
	VisitDynamic	Visits the children of the DynamicExpression.
	VisitElementInit	Visits the children of the ElementInit.
	VisitExtension	Visits the children of the extension expression.
	VisitGoto	Visits the children of the GotoExpression.
	VisitIndex	Visits the children of the IndexExpression.
	VisitInvocation	Visits the children of the InvocationExpression.
	VisitLabel	Visits the children of the LabelExpression.
	VisitLabelTarget	Visits the LabelTarget.
	VisitLambda<T>	Visits the children of the Expression<TDelegate>.
	VisitListInit	Visits the children of the ListInitExpression.
	VisitLoop	Visits the children of the LoopExpression.
	VisitMember	Visits the children of the MemberExpression.
	VisitMemberAssignment	Visits the children of the MemberAssignment.
	VisitMemberBinding	Visits the children of the MemberBinding.
	VisitMemberInit	Visits the children of the MemberInitExpression.
	VisitMemberListBinding	Visits the children of the MemberListBinding.
	VisitMemberMemberBinding	Visits the children of the MemberMemberBinding.
	VisitMethodCall	Visits the children of the MethodCallExpression.
	VisitNew	Visits the children of the NewExpression.
	VisitNewArray	Visits the children of the NewArrayExpression.
	VisitParameter	Visits the ParameterExpression.
	VisitRuntimeVariables	Visits the children of the RuntimeVariablesExpression.
	VisitSwitch	Visits the children of the SwitchExpression.
	VisitSwitchCase	Visits the children of the SwitchCase.
	VisitTry	Visits the children of the TryExpression.
	VisitTypeBinary	Visits the children of the TypeBinaryExpression.
	VisitUnary	Visits the children of the UnaryExpression.

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Remarks

This class is designed to be inherited to create more specialized classes whose functionality requires traversing, examining or copying an expression tree.

Version Information

Silverlight

Supported in: 5, 4

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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