Question

I am working in Asp.Net 4.0 C#– MVC-3. I have one problem and don’t know how to solve. I have 4 tables and want to fetch data from that tables with LINQ.

TABLES

1) Project_Master

    Field Names :   

    project_id (pk)
    project_name
    company_id (FK with company_master)
    company_category_id (FK with Company_Category_master)
    project_status_id (FK with Project_Status_Master)

2)Company_Master

   Field Names :

   company_id
   company_name
   company_category_id (FK with Company_Category_Master)

3) Company_Category_Master

   Field Names :

   Company_Category_Id
   Company_Category_Name

4) Project_Status_Master

   Field Name :

   Project_Status_Id
   Project_Status_Name

Below are the fields I need to fetch..(using LINQ Query)

1. Company_Name
2. Total completed project using status id(1)=complete (where staus 1 means completed)
3. Total Project
4. Company_category_name

So, how can I fetch data with linq query??

Thanks in advance…

Answer 1

Try the below example:

(From lse In Me.Leases, nty In Me.Entities, psg In Me.ProductionStages, lsg In LeaseStages _
        Where lse.LeaseName = leaseName _
        Select lse, lsg, nty, psg).Single

or you can use below example too:

var employeesQuery = from populationTable in db.Populations
join personTable in db.Persons on populationTable.Guid equals personTable.PopulationGuid
join employeeTable in db.Employees on personTable.Guid equals employeeTable.PersonGuid
select new { populationTable, personTable, employeeTable};