C# Class System.Data.Entity.Internal.Linq.DbQueryVisitor

A LINQ expression visitor that finds DbQuery uses with equivalent ObjectQuery instances.

Inheritance: System.Linq.Expressions.ExpressionVisitor

Protected Methods

Method	Description
VisitMember ( MemberExpression node ) : Expression	Replaces a DbQuery or DbQuery{T} property with a constant expression for the underlying ObjectQuery.
VisitMethodCall ( MethodCallExpression node ) : Expression	Replaces calls to DbContext.Set() with an expression for the equivalent ObjectQuery.

Method	Description
CreateObjectQueryConstant ( object dbQuery ) : Expression	Takes a DbQuery{T} or DbQuery and creates an expression for the underlying ObjectQuery{T}.
ExtractObjectQuery ( object dbQuery ) : System.Data.Entity.Core.Objects.ObjectQuery	Takes a DbQuery{T} or DbQuery and extracts the underlying ObjectQuery{T}.
GetContextFromConstantExpression ( Expression expression, MemberInfo member ) : DbContext	Gets a DbContext value from the given member, or returns null if the member doesn't contain a DbContext instance.
GetContextFromMember ( MemberInfo member, object value ) : DbContext	Gets the DbContext instance from the given instance or static member, returning null if the member does not contain a DbContext instance.
GetExpressionValue ( Expression expression ) : object	Tries to retrieve the value of an expression If the expression is a constant, it returns the constant value. If the expression is a field or property access on an expression, it returns the value of it recursively. Otherwise it returns null

Replaces a DbQuery or DbQuery{T} property with a constant expression for the underlying ObjectQuery.

protected VisitMember ( MemberExpression node ) : Expression
node	System.Linq.Expressions.MemberExpression	The node to replace.
return	System.Linq.Expressions.Expression

Replaces calls to DbContext.Set() with an expression for the equivalent ObjectQuery.

protected VisitMethodCall ( MethodCallExpression node ) : Expression
node	System.Linq.Expressions.MethodCallExpression	The node to replace.
return	System.Linq.Expressions.Expression