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PipelineDefinitionBuilderBucketAutoTInput, TIntermediate, TValue, TOutput Method (PipelineDefinitionTInput, TIntermediate, ExpressionFuncTIntermediate, TValue, Int32, ExpressionFuncIGroupingTValue, TIntermediate, TOutput, AggregateBucketAutoOptions, ExpressionTranslationOptions)

Appends a $bucketAuto stage to the pipeline.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.8.0+cc573f3e1f48f39162b4b680e921a623e127e8fa
Syntax
public static PipelineDefinition<TInput, TOutput> BucketAuto<TInput, TIntermediate, TValue, TOutput>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	Expression<Func<TIntermediate, TValue>> groupBy,
	int buckets,
	Expression<Func<IGrouping<TValue, TIntermediate>, TOutput>> output,
	AggregateBucketAutoOptions options = null,
	ExpressionTranslationOptions translationOptions = null
)

Parameters

pipeline
Type: MongoDB.DriverPipelineDefinitionTInput, TIntermediate
The pipeline.
groupBy
Type: System.Linq.ExpressionsExpressionFuncTIntermediate, TValue
The group by expression.
buckets
Type: SystemInt32
The number of buckets.
output
Type: System.Linq.ExpressionsExpressionFuncIGroupingTValue, TIntermediate, TOutput
The output projection.
options (Optional)
Type: MongoDB.DriverAggregateBucketAutoOptions
The options (optional).
translationOptions (Optional)
Type: MongoDB.DriverExpressionTranslationOptions
The translation options.

Type Parameters

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

Return Value

Type: PipelineDefinitionTInput, TOutput
The fluent aggregate interface.

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).
See Also