MVC LINQ to SQL Table Join Record Display

Question

Im having problems displaying records to my view when passing viewdata to a user control. This is only apparent for linq to sql objects where I am using table joins.

Answer 1

foreach (table1 m in (IEnumerable)ViewData.Model)

m is not of type table1. It is an anonymous type (select new { ... } in CViewDataUC.cs).

You should create a class that represents the type of the model objects you are passing from controller to view.

Answer 2

Thanks, this has helped me a lot!

One small comment, you have to use angle brackets:

IQueryable<CInformation> info = from table1 in dataContext.table1

Answer 3

Thanks, that worked like a charm. I totally overlooked the problem, I guess it's a Monday that's why :P. But for the people that run in the same problem and are still new to MVC and LINQ to SQL the problem is solved easily do these steps:

1. Create a class CInformation.cs Add variables similiar to your query

   public class CInformation {

   public CInformation() { }
   
   public string _column1{ get; set; }
   public string _column2{ get; set; }
   ...
   

   }

2. In your query

   public void uc_VDGenInfoDC(ViewDataDictionary viewData, int id) {

       var dataContext = new testDataContext();
   
       IQueryable<CInformation> info = from table1 in dataContext.table1
                                       join table2 in dataContext.table2 on table1.type_id equals table2.type_id        
                                       join table3 in dataContext.table3 on table1.id equals table3.id                  
                                       join table4 in dataContext.table4 on table1.id equals table4.id                       
                  where table1.test_id == id
                  select new CInformation
                  {
                      _column1 = table1.column1.ToString(),
                      _column2 = table2.column1.ToString(),
                      ...
                  };         
   
       viewData["vd_Info"] = info;
   
   }
   

3. In your User Control or view

   foreach (CInformation m in (IEnumerable)ViewData.Model){

    m.column1
    m.column2
    ...
   

   }