ProjectionDefinitionExtensionsMetaTDocument Method

Combines an existing projection with a meta projection.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.20.0+ee01960089f28ea1b501690df5fc9f6318a70242

Syntax

Copy

public static ProjectionDefinition<TDocument> Meta<TDocument>(
	this ProjectionDefinition<TDocument> projection,
	string field,
	string metaFieldName
)

<ExtensionAttribute>
Public Shared Function Meta(Of TDocument) ( 
	projection As ProjectionDefinition(Of TDocument),
	field As String,
	metaFieldName As String
) As ProjectionDefinition(Of TDocument)

[<ExtensionAttribute>]
static member Meta : 
        projection : ProjectionDefinition<'TDocument> * 
        field : string * 
        metaFieldName : string -> ProjectionDefinition<'TDocument>

Parameters

projection: Type: MongoDB.DriverProjectionDefinitionTDocument
The projection.
field: Type: SystemString
The field.
metaFieldName: Type: SystemString
The meta field name.

Type Parameters

TDocument: The type of the document.

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).

Reference

ProjectionDefinitionExtensions Class