视图中的行距（mvc4）

Question

I'm using MVC 4 with the Entity Framework. I've the following problem.

My raw data in the view is displaying in that way:

id | name| email| roles| modules
1|name1| email1| role1| module1
1| name1| email1| role2| module1
1| name1| email1|role3| module1

What I need to do is rowspan like this

id | name| email| roles| modules
1|name1| email1| role1, role2, role3| module1

I believe that it's better to make it in the controller than in the view. If so, how to do that with the Linq or simple list?

Answer 1

All you need is GroupBy :-

IEnumerable<TestForms.Models.v_HmsUnacceptedForms> result = data.GroupBy(x => x.id)
                 .ToList()   //To force run projection in memory.
                 .Select(x => 
               {
                     var firstRecord = x.FirstOrDefault();
                     return new TestForms.Models.v_HmsUnacceptedForms
                    {
                       id = x.Key,
                       name = firstRecord != null ? firstRecord.name : String.Empty,
                       email = firstRecord != null ? firstRecord.email: String.Empty,
                       roles = String.Join(",",x.Select(z => z.roles),
                       modules = firstRecord != null ? firstRecord.modules : String.Empty
                    };
               });

Here, I have considered that for each id, you need the first name,email and modules column. if this is not the case you can group by multiple columns instead of id like new { x.id, x.name, x.email } .