Question

LINQ join syntax. One master table, two child tables

Asked by: kwh3856

I am trying to join three tables together.  Basically I have one table called Referrals, and two other tables called PreAuths and Patients.  They can all be tied via a field called MPI.  I can get the Referral and the PreAuths table to join but when I add the third table I get a syntax error.  Can someone point out what I am doing wrong?

Here is my code:

PRE_AUTH myPreAuths = new PRE_AUTH();
                    PROVIDER_REFERRAL_QUEUE myProviderReferralQueue = new PROVIDER_REFERRAL_QUEUE();
                    PATIENT myPatient = new PATIENT();
                    
                    var PatientReferralsResult = from patientreferral in dcChartRelay.PROVIDER_REFERRAL_QUEUEs
                                                join preauths in dcRadRelay.PRE_AUTHs on
                                                patientreferral.MPI equals preauths.MPI
                                                join patients in dcRadRelay.PATIENTs on
                                                patientreferral.MPI equals patients.MPI
                                                
                                                select new
                                                {
                                                    patients.Fname,
                                                    patients.Lname,
                                                    patients.DOB,
                                                    patients.Phone,
                                                    patients.MPI,
                                                    patients.SSN,
                                                    patients.WkPhone,
                                                    patients.Address,
                                                    patients.Zip,
                                                    patients.City,
                                                    patients.State,
                                                    patientreferral.ReferralSubmittedDate,
                                                    patientreferral.MPI,
                                                    preauths.MPI,
                                                    preauths.AuthDate,
                                                   
 
                                                };

                                  
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Asked On
2009-08-09 at 14:33:50ID24638579
Tags

LINQ

Topics

Language Integrated Query - LINQ

,

Microsoft Visual C#.Net

,

Microsoft Visual Basic.Net

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: FernandoSotoPosted on 2009-08-09 at 20:07:56ID: 25056955

Hi Kenny;

I took a look at the query and nothing is jumping out as being wrong with the syntax except having an extra comma at the end of the select clause:

    preauths.MPI,
    preauths.AuthDate,     // Comma not needed but should not cause a problem
};

Can you post the error message and on which line, if it gives one. A screen shot could help of the area of the syntax error.

Fernando

 

by: kwh3856Posted on 2009-08-09 at 20:20:38ID: 31613542

Fernando,
Thanks for trying to help.  I found the answer.  I had to add the following code:

string MPI;
                MPI = Session.Contents["MPI"].ToString();
                Guid ConvertedMPI = new Guid(MPI);

and then I changed the following line
patientreferral.MPI equals ConvertedMPI

Thanks for trying to help.  I wanted to award you the points for being the first one who tried to help me.

 

by: FernandoSotoPosted on 2009-08-09 at 20:37:38ID: 25057044

Thanks Kenny, Always glad to lend a hand.  ;=)

20120131-EE-VQP-002

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