Project(TInput, TIntermediate, TOutput) Method (PipelineDefinition(TInput, TIntermediate), Expression(Func(TIntermediate, TOutput)), ExpressionTranslationOptions)

PipelineDefinitionBuilderProjectTInput, TIntermediate, TOutput Method (PipelineDefinitionTInput, TIntermediate, ProjectionDefinitionTIntermediate, TOutput)

Appends a $project stage to the pipeline.

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

Syntax

Copy

public static PipelineDefinition<TInput, TOutput> Project<TInput, TIntermediate, TOutput>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	ProjectionDefinition<TIntermediate, TOutput> projection
)

<ExtensionAttribute>
Public Shared Function Project(Of TInput, TIntermediate, TOutput) ( 
	pipeline As PipelineDefinition(Of TInput, TIntermediate),
	projection As ProjectionDefinition(Of TIntermediate, TOutput)
) As PipelineDefinition(Of TInput, TOutput)

[<ExtensionAttribute>]
static member Project : 
        pipeline : PipelineDefinition<'TInput, 'TIntermediate> * 
        projection : ProjectionDefinition<'TIntermediate, 'TOutput> -> PipelineDefinition<'TInput, 'TOutput>

Parameters

pipeline: Type: MongoDB.DriverPipelineDefinitionTInput, TIntermediate
The pipeline.
projection: Type: MongoDB.DriverProjectionDefinitionTIntermediate, TOutput
The projection.

Type Parameters

TInput: The type of the input documents.
TIntermediate: The type of the intermediate documents.
TOutput: The type of the output documents.

Return Value

Type: PipelineDefinitionTInput, TOutput
A new pipeline with an additional stage.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type PipelineDefinitionTInput, TIntermediate. 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).

Exceptions

Exception	Condition
NotSupportedException

Reference

PipelineDefinitionBuilder Class

Project Overload

MongoDB.Driver Namespace