CODEWITHSUNDEEP
c#linqcontains
Jhorra
Jhorra

Reputation: 6321

Using Linq to do a Contains with multiple values

I have a medication table that I'm looking for certain drug names, but I need to search for multiple names. Here is where I currently am with it.

string[] names = new string[2];
names[0] = "apixaban";
names[1] = "desirudin";

var meds = (from m in Medications where names.Any(m.BrandName.Contains) || names.Any(m.GenericName.Contains) select m);

What I have isn't working, and I'm currently stuck. I know I'm close, but I can't quite figure out what's wrong.

EDIT

For clarification, if the name I'm searching for is desirudin, then the BrandName or Generic name will be longer, so I have to have the contains on the field in the database.

EDIT 2 Here is the error I recieve.

Unsupported overload used for query operator 'Any'.

Here is what I finally ended up with

var meds = (from m in db.AdmissionMedications where 
(names.Any(n => m.BrandName.Contains(n)) || names.Any(n => m.GenericName.Contains(n))
) select m);

Upvotes: 20

Views: 137179

Answers (6)

Jye
Jye

Reputation: 71

For people in the future, keep in mind that calling names.Any() where names is a list<T> causes errors since (if I understand correctly), LINQ can only handle IQueryable lists when translating a query to SQL.

This can be handled by calling var queryableNames = names.AsQueryable() and using queryableNames instead

Upvotes: 0

sa_ddam213
sa_ddam213

Reputation: 43636

Maybe somthing like

C# Linq:

var meds = (from m in Medications 
            where names.Any(name => name.Equals(m.BrandName) || m.GenericName.Contains(name)) 
            select m);

Extension methods:

List<Medication> meds = Medications
    .Where( med =>
        names.Any( name =>
            name.Equals( med.BrandName ) || med.GenericName.Contains( name )
        )
    )
    .ToList();

Upvotes: 36

Linkanyway
Linkanyway

Reputation: 109

var x = (from c in Reports where c.HKPlanningQty == xi select c).Select(u=>new {Style=u.Style,QTN=u.HKPlanningQty}).OrderBy(u =>u.Style ).Where(v=>v.Style.Contains("44")||v.Style.Contains("58"));

Upvotes: 0

Umar Farooq Khawaja
Umar Farooq Khawaja

Reputation: 3987

Just do a join between the medication table and the names array.

var query = from m in Medications
            from n in in names
            where m.BrandNames.Any(bn => bn.Contains(n)) || m.GenericNames.Any(gn => gn.Contains(n))
            select m;

Upvotes: 1

chead23
chead23

Reputation: 1879

I think you want to try:

var query = Medications.Where(m => names.Contains(m.BrandName) || names.Contains(m.GenericName));

Upvotes: 1

aush
aush

Reputation: 2108

If I've understood your right:

var meds = Medications.Where(m => names.Contains(m.BrandName) || names.Contains(m.GenericName));

Upvotes: 0

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