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PipelineDefinitionBuilder.BucketAuto<TInput, TIntermediate, TValue, TOutput> Method (PipelineDefinition<TInput, TIntermediate>, Expression<Func<TIntermediate, TValue>>, Int32, Expression<Func<IGrouping<AggregateBucketAutoResultId<TValue>, TIntermediate>, TOutput>>, AggregateBucketAutoOptions, ExpressionTranslationOptions)

Appends a $bucketAuto stage to the pipeline (this overload can only be used with LINQ3).

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.21.0+5a9c3311e158910b88195f290e6d4b1b2715d2b2
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<AggregateBucketAutoResultId<TValue>, TIntermediate>, TOutput>> output,
	AggregateBucketAutoOptions options = null,
	ExpressionTranslationOptions translationOptions = null
)

Parameters

pipeline
Type: MongoDB.Driver.PipelineDefinition<TInput, TIntermediate>
The pipeline.
groupBy
Type: System.Linq.Expressions.Expression<Func<TIntermediate, TValue>>
The group by expression.
buckets
Type: System.Int32
The number of buckets.
output
Type: System.Linq.Expressions.Expression<Func<IGrouping<AggregateBucketAutoResultId<TValue>, TIntermediate>, TOutput>>
The output projection.
options (Optional)
Type: MongoDB.Driver.AggregateBucketAutoOptions
The options (optional).
translationOptions (Optional)
Type: MongoDB.Driver.ExpressionTranslationOptions
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: PipelineDefinition<TInput, 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 PipelineDefinition<TInput, 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