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Queryable.GroupBy Method

Groups the elements of a sequence.

This member is overloaded. For complete information about this member, including syntax, usage, and examples, click a name in the overload list.

  NameDescription
Public method Static member GroupBy<TSource, TKey>(IQueryable<TSource>, Expression<Func<TSource, TKey>>) Groups the elements of a sequence according to a specified key selector function.
Public method Static member GroupBy<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.
Public method Static member GroupBy<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.
Public method Static member GroupBy<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.
Public method Static member GroupBy<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.
Public method Static member GroupBy<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.
Public method Static member GroupBy<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.
Public method Static member GroupBy<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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