Class ReplacingExpressionVisitor
- Namespace
- Microsoft.EntityFrameworkCore.Query
- Assembly
- Microsoft.EntityFrameworkCore.dll
An expression visitor that replaces one expression with another in given expression tree.
This type is typically used by database providers (and other extensions). It is generally not used in application code.
public class ReplacingExpressionVisitor : ExpressionVisitor- Inheritance
-
ReplacingExpressionVisitor
- Inherited Members
Remarks
See Implementation of database providers and extensions and How EF Core queries work for more information and examples.
Constructors
ReplacingExpressionVisitor(IReadOnlyList<Expression>, IReadOnlyList<Expression>)
Creates a new instance of the ReplacingExpressionVisitor class.
public ReplacingExpressionVisitor(IReadOnlyList<Expression> originals, IReadOnlyList<Expression> replacements)Parameters
originalsIReadOnlyList<Expression>A list of original expressions to replace.
replacementsIReadOnlyList<Expression>A list of expressions to be used as replacements.
Methods
Replace(Expression, Expression, Expression)
Replaces one expression with another in given expression tree.
public static Expression Replace(Expression original, Expression replacement, Expression tree)Parameters
originalExpressionThe expression to replace.
replacementExpressionThe expression to be used as replacement.
treeExpressionThe expression tree in which replacement is going to be performed.
Returns
- Expression
An expression tree with replacements made.
Visit(Expression?)
public override Expression? Visit(Expression? expression)Parameters
expressionExpression
Returns
VisitMember(MemberExpression)
protected override Expression VisitMember(MemberExpression memberExpression)Parameters
memberExpressionMemberExpression
Returns
VisitMethodCall(MethodCallExpression)
protected override Expression VisitMethodCall(MethodCallExpression methodCallExpression)Parameters
methodCallExpressionMethodCallExpression