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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 }
The way you'd do a join on more than one criteria generally is to use an anonymous type: join pc in productcategory on new { Id = p.Id, Other = p.Other } equals new { Id = pc.ProdId, Other = pc.Other }. This works in Linq-to-Objects, and I presume the same will work with database queries as well.
We’ll start by discussing the basics of LINQ joins, and then we’ll show you how to use LINQ to join tables on different columns, on the same column, and on multiple columns. We’ll also provide some tips on how to optimize your LINQ queries for performance.
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:
4 wrz 2024 · You can easily join tables based on more than one field. For instance, you might want to join based on both ‘CustomerID’ and ‘OrderDate’ to retrieve orders placed by a specific customer on a particular day.
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.)
In C#, you can perform a LINQ Join with multiple data sources by using the join keyword and the equals keyword combined with the on keyword. This allows you to combine data from multiple collections or sources based on a common key or condition.
