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PipelineDefinitionBuilder.Bucket<TInput, TIntermediate, TValue, TOutput> Method (PipelineDefinition<TInput, TIntermediate>, Expression<Func<TIntermediate, TValue>>, IEnumerable<TValue>, Expression<Func<IGrouping<TValue, TIntermediate>, TOutput>>, AggregateBucketOptions<TValue>, ExpressionTranslationOptions)

Appends a $bucket stage to the pipeline.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.16.0+eeafbea0921243a5868b81984e1083a07c1f75bc
Syntax
public static PipelineDefinition<TInput, TOutput> Bucket<TInput, TIntermediate, TValue, TOutput>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	Expression<Func<TIntermediate, TValue>> groupBy,
	IEnumerable<TValue> boundaries,
	Expression<Func<IGrouping<TValue, TIntermediate>, TOutput>> output,
	AggregateBucketOptions<TValue> 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.
boundaries
Type: System.Collections.Generic.IEnumerable<TValue>
The boundaries.
output
Type: System.Linq.Expressions.Expression<Func<IGrouping<TValue, TIntermediate>, TOutput>>
The output projection.
options (Optional)
Type: MongoDB.Driver.AggregateBucketOptions<TValue>
The options.
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 values.
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