How to match a column which has multiple integer values separated by commas in linq?

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HI guys,

I have list, in which i have column with multiple integer values(separated by commas).

eg:
------------------------
| Program | Module      |
------------------------
| I       | 1,2,3       |
------------------------
| II      | 2, 3        |
------------------------
| III     | 1,3         |
------------------------

Now, supppose, if i want to select programs where module is 2.

What I have tried:

int sid = 2;
IEnumerable<int> ids = Program.All.FindAll( item => sid.contains(item.Module.Split(',').Select(s => (int)s) // getting error: cannot convert string to int

Can any one plz help me.

Thanks

Posted 12-Jul-16 22:45pm

abdul subhan mohammed

Updated 12-Jul-16 22:55pm

v2

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Comments

F-ES Sitecore 13-Jul-16 4:48am

This is what happens when you don't structure your database correctly. The proper solution is to redesign your database to use one-to-many relationships.

abdul subhan mohammed 13-Jul-16 4:51am

any solution for this?

F-ES Sitecore 13-Jul-16 4:52am

Redesign your database tables, google for how you implement a one-to-many relationship in SQL, then google how to use a one-to-many relationship in LINQ.

abdul subhan mohammed 13-Jul-16 4:55am

any solution without redesigning the database?

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Karthik_Mahalingam · Answer 1 · 2016-07-12T22:55:00

try this

C#

List<Prog> lst = new List<Prog> ();
     lst.Add( new Prog(){ Program_ = "I", Module =  "1,2,3"});
     lst.Add( new Prog(){ Program_ = "II", Module =  "2,3"});
     lst.Add( new Prog(){ Program_ = "III", Module =  "1,3"});


     int find = 2;

   IEnumerable<string> programs =   lst.Where(k => k.Module.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries).Select(a => Convert.ToInt32(a)).Contains(find)).Select(x => x.Program_).ToList();

C#

public class Prog
  {
      public string Program_ { get; set; }
      public string Module { get; set; }
  }