CqlQueryExtensionsGroupByTKey, TSource Method

Returns a CqlQuery which after execution returns grouped sequence of values based on a predicate. To execute this CqlQuery use Execute() method.

Namespace: Cassandra.Data.Linq
Assembly: Cassandra (in Cassandra.dll) Version: 3.13.0

Syntax

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public static CqlQuery<IGrouping<TKey, TSource>> GroupBy<TKey, TSource>(
	this CqlQuery<TSource> source,
	Expression<Func<TSource, TKey>> predicate
)

Parameters

source: Type: Cassandra.Data.LinqCqlQueryTSource
The CqlQuery<TSource> to filter.
predicate: Type: System.Linq.ExpressionsExpressionFuncTSource, TKey
A function to test each element for a condition.

Type Parameters

TKey: The type of the value returned by selector.
TSource: The type of the elements of source.

Return Value

Type: CqlQueryIGroupingTKey, TSource
a CqlQuery<TSource> which after execution will return an IEnumerable<TSource> that contains elements from the input sequence that satisfy the condition.

Usage Note

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

Reference

CqlQueryExtensions Class