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Is it possible in LINQ to join on multiple fields in a single join? EDIT var result = from x in entity join y in entity2 on new { x.field1, x.field2 } equals new { y.field1, y.field2 }
14 gru 2011 · You can't do an "or" style join in LINQ with an actual join clause. All join clauses in LINQ are equijoins. The closest you can come is a where clause: var query = from a in A from b in B where a.Foo == b.Foo || a.Foo == b.Bar select new { a, b };
The difference of course is the explicit declaration of the columns as a variable to identify on. .Join(. context.Resources, o => new { Id = o.ResourceId, Type = o.ResourceTypeId}, i => new { Id = i.Id, Type = TypeId}, (o, i) = new { rType : i }; Agree with you for explicit give name to joined columns. Great answer.
Learn how to join multiple conditions in LINQ with this comprehensive guide. Includes examples and code snippets to help you understand the concepts and get started quickly.
7 wrz 2023 · LINQ Inner Join With Multiple Conditions. If you want to use multiple conditions within your join, you can simply use more than one where clause. Let’s update our query once again:
29 maj 2024 · The join methods provided in the LINQ framework are Join and GroupJoin. These methods perform equijoins, or joins that match two data sources based on equality of their keys. (For comparison, Transact-SQL supports join operators other than equals, for example the less than operator.)
15 wrz 2021 · DataSet ds = new DataSet(); ds.Locale = CultureInfo.InvariantCulture; FillDataSet(ds); DataTable contacts = ds.Tables["Contact"]; DataTable orders = ds.Tables["SalesOrderHeader"]; var query = contacts.AsEnumerable().Join(orders.AsEnumerable(), order => order.Field<Int32>("ContactID"), contact => contact.Field<Int32>("ContactID"), (contact ...
