DbExpressionBuilder.GetRefKey(DbExpression) Method
Definition
Important
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Creates a new DbRefKeyExpression that retrieves the key values of the specified reference in structural form.
public:
[System::Runtime::CompilerServices::Extension]
static System::Data::Common::CommandTrees::DbRefKeyExpression ^ GetRefKey(System::Data::Common::CommandTrees::DbExpression ^ argument);
public static System.Data.Common.CommandTrees.DbRefKeyExpression GetRefKey (this System.Data.Common.CommandTrees.DbExpression argument);
static member GetRefKey : System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbRefKeyExpression
<Extension()>
Public Function GetRefKey (argument As DbExpression) As DbRefKeyExpression
Parameters
- argument
- DbExpression
The expression that provides the reference. This expression must have a reference Type with an Entity element type.
Returns
A new DbRefKeyExpression that retrieves the key values of the specified reference.
Exceptions
argument
is null.
argument
does not have a reference result type.
Applies to
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