This seems confusing at first but once you get acquainted with the way the SQL is composed from the expressions it will make a lot more sense, under the covers this will generate the type of join you are looking for. Posted on November 18, 2010 by Parag. 发表时间：2022-05-05作者：Dev Beginner . Use Linq expression to group multiple preperties of objects or multiple columns of DataTable in C#. Entity Framework LINQ joining 5 tables on multiple columns … the transaction variable is out of scope. Provide the Project name such as "JoinDataTableUsingLINQ" or another as you wish and specify the location. Join I have described how to use joins among two and more table and also types of joins in Linq. Linq join on multiple columns and multiple conditions You also can make join on multiple conditions, suppose you want data to be matched between more than one column, in that case you can write join on multiple columns and conditions. on new { CutomerId = order.CustomerId // column 2 } equals new { CutomerId = cust.CustomerId // condition 2 } SQL. In the below example we have written 2 ways that can be used to join in Linq Here the Department and the Employee are joined. linq join on multiple columns
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