Linq Query to get Status from Joined tables

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I have 3 Tables

User Tabele

SQL

UserID UserName
1        Ma
2        Da
3        Ca
4        ga

EnterpriseApplication_User (Mapping Table)

SQL

ApplicationID USERID
2	       4
3	       4

EnterpriseApplication

SQL

ID NAME  APIKEY
1	A	ca822389
2	B	f1291236
3	C	2f098dfa
4	D	8911a9e5

I want to get the Subscribed Status for a specific user by join EnterpriseApplication table and the EnterpriseApplication_User table, It should be write by linq query in the code.

Subscribed Status : In this EnterpriseApplication_User Table the ApID 2 and 3 has subscribed to the UserID 4, I want to get the status coloumn as output with true for appID 2 and 3 , for the 1 and 2 Status false.

Output : For the userID 4

SQL

APID    APNAME  STAUS 
1	A     false
2	B     true
3	C     true
4	D     false

Posted 29-Oct-14 17:45pm

Gihan Liyanage

Updated 29-Oct-14 17:46pm

v2

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2 solutions

Solution 1

I use this resource as first base when researching linq 101 Linq queries[^]

Posted 29-Oct-14 19:49pm

Mycroft Holmes

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Gihan Liyanage 30-Oct-14 8:41am

Thanx Mycroft. I will look on this

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Gihan Liyanage · Accepted Answer · 2014-10-30T02:45:00

This is the solution. I got this from my senior

C#

List<enterpriseapplication> ReturnList = new List<enterpriseapplication>();

            IEnumerable<enterpriseapplicationdata> UserApplications = dbContext.RegisterApps.ToList();

            foreach (EnterpriseApplicationData UserApp in UserApplications)
            {
                EnterpriseApplication registerApp = new EnterpriseApplication { Id = UserApp.Id, Name = UserApp.Name, IsSubscribed=UserApp.Users.Any(u=>u.UserId==applicationUserId) };

                ReturnList.Add(registerApp);
            }

</enterpriseapplicationdata></enterpriseapplication></enterpriseapplication>