Question

I created one method in my model :

public IList<Test> GetData(int IDCus){

var list = from j in Context.Test
join y in this.Context.Test1 on j.ID equals y.ID
where j.ID == IDCus
select new {
    Tnum = j.Ynum,
    Level = y.Level
};
    return list.ToList();
}

When I just using select without new, it work normally. But when I tried to used select new in my query, it error : Cannot implicitly convert type System.Collections.Generic.List<AnonymousType#1> to System.Collections.Generic.IList<ITEX.Models.Test>.

Any clues? Thanks.

Answer 1

If both Ynum and Level are int you first have to verify that the class Test looks like this:

public class Test
{
    public int Tnum { get; set; }
    public int Level {get;set;}
}

And then the query should look something like this:

public IList<Test> GetData(int IDCus)
{
    var list = (
                from j in Context.Test
                join y in this.Context.Test1 
                    on j.ID equals y.ID
                where 
                    j.ID == IDCus
                select new Test()
                    {
                        Tnum = j.Ynum,
                        Level = y.Level
                    }
            );
    return list.ToList();
}

If you are using Test somewhere else you might have to create a new class for this call, we can call it Test2. Then the class should look like this:

public class Test2
{
    public int Tnum { get; set; }
    public int Level {get;set;}
}

And the function for getting the information should look like this:

public IList<Test2> GetData(int IDCus)
{
    var list = (
                from j in Context.Test
                join y in this.Context.Test1 
                    on j.ID equals y.ID
                where 
                    j.ID == IDCus
                select new Test2()
                    {
                        Tnum = j.Ynum,
                        Level = y.Level
                    }
            );
    return list.ToList();
}

I hope this will help