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IAggregateFluentExtensionsBucketAutoTResult, TValue, TNewResult Method (IAggregateFluentTResult, ExpressionFuncTResult, TValue, Int32, ExpressionFuncIGroupingTValue, TResult, TNewResult, AggregateBucketAutoOptions)

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 IAggregateFluent<TNewResult> BucketAuto<TResult, TValue, TNewResult>(
	this IAggregateFluent<TResult> aggregate,
	Expression<Func<TResult, TValue>> groupBy,
	int buckets,
	Expression<Func<IGrouping<TValue, TResult>, TNewResult>> output,
	AggregateBucketAutoOptions options = null
)

Parameters

aggregate
Type: MongoDB.DriverIAggregateFluentTResult
The aggregate.
groupBy
Type: System.Linq.ExpressionsExpressionFuncTResult, TValue
The expression providing the value to group by.
buckets
Type: SystemInt32
The number of buckets.
output
Type: System.Linq.ExpressionsExpressionFuncIGroupingTValue, TResult, TNewResult
The output projection.
options (Optional)
Type: MongoDB.DriverAggregateBucketAutoOptions
The options (optional).

Type Parameters

TResult
The type of the result.
TValue
The type of the value.
TNewResult
The type of the new result.

Return Value

Type: IAggregateFluentTNewResult
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 IAggregateFluentTResult. 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