| ProjectionDefinitionExtensionsElemMatchTDocument, TItem Method (ProjectionDefinitionTDocument, ExpressionFuncTDocument, IEnumerableTItem, FilterDefinitionTItem) | 
 
            Combines an existing projection with a projection that filters the contents of an array.
            
 
    Namespace: 
   MongoDB.Driver
    Assembly:
   MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.12.2+a4a3888f4fb51bb518b1eb5002effc2d47f2ea6a
 Syntax
Syntaxpublic static ProjectionDefinition<TDocument> ElemMatch<TDocument, TItem>(
	this ProjectionDefinition<TDocument> projection,
	Expression<Func<TDocument, IEnumerable<TItem>>> field,
	FilterDefinition<TItem> filter
)
<ExtensionAttribute>
Public Shared Function ElemMatch(Of TDocument, TItem) ( 
	projection As ProjectionDefinition(Of TDocument),
	field As Expression(Of Func(Of TDocument, IEnumerable(Of TItem))),
	filter As FilterDefinition(Of TItem)
) As ProjectionDefinition(Of TDocument)
[<ExtensionAttribute>]
static member ElemMatch : 
        projection : ProjectionDefinition<'TDocument> * 
        field : Expression<Func<'TDocument, IEnumerable<'TItem>>> * 
        filter : FilterDefinition<'TItem> -> ProjectionDefinition<'TDocument> 
Parameters
- projection
- Type: MongoDB.DriverProjectionDefinitionTDocument
 The projection.
- field
- Type: System.Linq.ExpressionsExpressionFuncTDocument, IEnumerableTItem
 The field.
- filter
- Type: MongoDB.DriverFilterDefinitionTItem
 The filter.
Type Parameters
- TDocument
- The type of the document.
- TItem
- The type of the item.
Return Value
Type: 
ProjectionDefinitionTDocument
            A combined projection.
            
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type 
ProjectionDefinitionTDocument. When you use instance method syntax to call this method, omit the first parameter. For more information, see 
Extension Methods (Visual Basic) or 
Extension Methods (C# Programming Guide).
 See Also
See Also