C1.LiveLinq.IndexedQueryExtensions.GroupJoin
GroupJoin Method
GroupJoin<TOuter, TInner, TKey, TResult>(IIndexedSource<TOuter>, IEnumerable<TInner>, Expression<Func<TOuter, TKey>>, Expression<Func<TInner, TKey>>, Expression<Func<TOuter, IEnumerable<TInner>, TResult>>)
Correlates the elements of two collections based on equality of keys and groups the results.
Declaration
public static IIndexedSource<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IIndexedSource<TOuter> outer, IEnumerable<TInner> inner, Expression<Func<TOuter, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<TOuter, IEnumerable<TInner>, TResult>> resultSelector)Parameters
| Type | Name | Description |
|---|---|---|
| IIndexedSource<TOuter> | outer | The first collection to join. |
| IEnumerable<TInner> | inner | The collection to join to the first collection. |
| Expression<Func<TOuter, TKey>> | outerKeySelector | A function to extract the join key from each element of the first collection. |
| Expression<Func<TInner, TKey>> | innerKeySelector | A function to extract the join key from each element of the second collection. |
| Expression<Func<TOuter, IEnumerable<TInner>, TResult>> | resultSelector | A function to create a result element from an element from the first collection and a collection of matching elements from the second collection. |
Returns
| Type | Description |
|---|---|
| IIndexedSource<TResult> | An IIndexedSource<TResult> that contains elements of type TResult that are obtained by performing a grouped join on two collections. |
Type Parameters
| Name | Description |
|---|---|
| TOuter | The type of the elements of the first collection. |
| TInner | The type of the elements of the second collection. |
| TKey | The type of the keys returned by the key selector functions. |
| TResult | The type of the result elements. |