How to refer two tables, using a column in another table - Entity Framework

Join two tables using LINQ to Entities, then group and total the columns from each tables.

As stated in the headline, I want to categorize the results of a join between two tables (target and transaction) based on a number of their columns, then add the values of the columns in BOTH tables. The ensuing query restricts access to columns from the join's FIRST table only!... var actualsVsTargets = (from target in ObjectContext.PipelineTarge...

How to join two table from two different edmx using linq query

Update...According to what you said, EF was unable to interpret an expression tree that was merged from two different contexts....You can materialize the data if the combined amount of records in the tables is modest or if you can decrease the number of rows in the join to a manageable number (say, 100 or less per row).....ToList() / .ToArray() / ....

how to insert data into two tables at a time using entity framework

I need to add data from two tables that are in windows forms. Every control on my Windows forms is a data source. Please advise me on how to simultaneously enter data from windows forms into two tables....My desk looks like this....**product table** pid salePrice **Product_tax table** pid taxid ...the button for submission will automatical...

Map Table Column to Enum and Lookup Table to Enum

Normally, you wouldn't translate a table to an enum type. Without integrating these tables in the model, you just construct an enum type based on the information in your lookup table and utilize it. Consider the Northwind as an example. Table of categories...ID Name Description 1 Beverages Soft drinks, coffees, teas, beers, and ...

Entity Framework - How to Insert to table with foreign keys without retrieving foreign table rows first

Foreign key properties can simply be added to the navigation properties and set using the existing ids. By doing this, you will avoid having to search the database for related items only to set the relationship.

Entity Framework Include related table when table is empty

When utilizing EF Classes include Table1, Table2, and so on....Include(string)... a technique is used to cache connected records in a single query. You may eliminate...Include... Your query and statements will function similarly. Therefore, you receive count = 0 for Table2 attribute if there are no related records between Table1 and Table2 in your ...

Entity Framework 6 - Missing table with only primary keys referencing different tables

As we transition away from Linq2Sql, we are studying Entity Framework 6.1 (via NuGet). We have a few tables that associate two different tables, as seen below....First generation EF6 database...DB Schematic:...Overview of a schema:...When creating a Database First EF6 EDMX file in Visual Studio with a blank class library, the diagram only creates T...

Entity Framework 6 Creating Two table from the same entity object

You can't have more than one...DbSet... directing to the same class in one...DbContext... Your choices are:...Adding additional attributes to an existing class...Inheritance...using various...DBContext... s

How to create multiple table references to one table - Entity framework

ZZZ_tmp

Using AutoMapper and Entity Framework to change what columns are fetched from a database table

ZZZ_tmp