error LINQ to Entities does not recognize the method 'Int32 func(System.String)' method, and this method cannot be translated into a store expression. Error Message You must set this property to a non-null value of type 'System.Int64'. Error occurred when trying to create a controller of...
With SQL Server 2000, LINQ to Entities queries may fail if they produce nested Transact-SQL queries that are three or more levels deep. Projecting to an Anonymous Type If you define your initial query path to include related objects by using theIncludemethod on theObjectQuery<T>and then use...
With SQL Server 2000, LINQ to Entities queries may fail if they produce nested Transact-SQL queries that are three or more levels deep.Projecting to an Anonymous TypeIf you define your initial query path to include related objects by using the Include method on the ObjectQuery and then use ...
To “check my math” I generate 1000 transactions (weighted to include several that should match). I then apply the filter and iterate the results so I can manually test that the conditions were met.var predicate = jsonExpressionParser .ParsePredicateOf<Transaction>(jsonDocument); var ...
The most notable reason is that the resultant objects will be your entities, rather than anonymous types with entities as their properties. However, Include does not allow you to filter the related data as you can with a projection. Include is a query builder method and you can apply it to...
TheWheremethod will iterate thePlacestable in a sequence, and the lambda expression will receive each row as a parameter. Then, it will return atruevalue for those rows where the value ofCounty_idcolumn is equal to1926. Atruevalue tells theWheremethod to include the row in the query’s...
The structure is simple: there is anANDorORconditionthat contains a set of rules that are either comparisons, or a nested condition. My goal was twofold: learn more about LINQ expressions to better inform my understanding of EF Core and related technologies, and provide a simple example to show...
Nested Include in EF 6 Nested Select in LINQ using Lambda expression New Tables does not show up in Add tab in Entity Model Update Wizard. Newbie Question: Cannot Implicitly convert type 'object' to 'int' Nhibernate Mapping exception NHibernate - Could not compile the mapping document NHiberna...
Certainly, you can always find a way to join customers and orders together in a query by forming the cross product and retrieving all the relative bits of data as one big projection. But then the results would not be entities. Entities are objects with identity that you can modify while th...
Basically with this approach you'd create a new DataContext for each atomic operation which would include potentially multiple queries and updates against a database. This would also have to include transactional operations such as running Transactions across multiple operations. The idea is that you ...