Queryable.GroupBy Method

 

Groups the elements of a sequence.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

NameDescription
System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey>(IQueryable<TSource>, Expression<Func<TSource, TKey>>)

Groups the elements of a sequence according to a specified key selector function.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey>(IQueryable<TSource>, Expression<Func<TSource, TKey>>, IEqualityComparer<TKey>)

Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey, TElement>(IQueryable<TSource>, Expression<Func<TSource, TKey>>, Expression<Func<TSource, TElement>>)

Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey, TElement>(IQueryable<TSource>, Expression<Func<TSource, TKey>>, Expression<Func<TSource, TElement>>, IEqualityComparer<TKey>)

Groups the elements of a sequence and projects the elements for each group by using a specified function. Key values are compared by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey, TResult>(IQueryable<TSource>, Expression<Func<TSource, TKey>>, Expression<Func<TKey, IEnumerable<TSource>, TResult>>)

Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey, TResult>(IQueryable<TSource>, Expression<Func<TSource, TKey>>, Expression<Func<TKey, IEnumerable<TSource>, TResult>>, IEqualityComparer<TKey>)

Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Keys are compared by using a specified comparer.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey, TElement, TResult>(IQueryable<TSource>, Expression<Func<TSource, TKey>>, Expression<Func<TSource, TElement>>, Expression<Func<TKey, IEnumerable<TElement>, TResult>>)

Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function.

System_CAPS_pubmethodSystem_CAPS_staticGroupBy<TSource, TKey, TElement, TResult>(IQueryable<TSource>, Expression<Func<TSource, TKey>>, Expression<Func<TSource, TElement>>, Expression<Func<TKey, IEnumerable<TElement>, TResult>>, IEqualityComparer<TKey>)

Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Keys are compared by using a specified comparer and the elements of each group are projected by using a specified function.

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