FilterDefinitionBuilderTDocumentOfTypeTField, TDerived Method (ExpressionFuncTDocument, TField, ExpressionFuncTDerived, Boolean)

Creates an OfType filter that matches documents with a field of a derived type and that also match a filter on the derived field.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.17.0+b316340e6cc3a8bfc8638dc31b54fbbfe41bfcb2

Syntax

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public FilterDefinition<TDocument> OfType<TField, TDerived>(
	Expression<Func<TDocument, TField>> field,
	Expression<Func<TDerived, bool>> derivedFieldFilter
)
where TDerived : TField

Public Function OfType(Of TField, TDerived As TField) ( 
	field As Expression(Of Func(Of TDocument, TField)),
	derivedFieldFilter As Expression(Of Func(Of TDerived, Boolean))
) As FilterDefinition(Of TDocument)

member OfType : 
        field : Expression<Func<'TDocument, 'TField>> * 
        derivedFieldFilter : Expression<Func<'TDerived, bool>> -> FilterDefinition<'TDocument>  when 'TDerived : 'TField

Parameters

field: Type: System.Linq.ExpressionsExpressionFuncTDocument, TField
The field.
derivedFieldFilter: Type: System.Linq.ExpressionsExpressionFuncTDerived, Boolean
A filter on the derived field.

Type Parameters

TField: The type of the field.
TDerived: The type of the matching derived field value.

Return Value

Type: FilterDefinitionTDocument
An OfType filter.

Reference

FilterDefinitionBuilderTDocument Class

OfType Overload

MongoDB.Driver Namespace