Get values from a dynamic list

Question

I have a list of the kind dynamic:

private List<dynamic> listServicos = new List<dynamic>();

And it’s being populated like this:

listServicos.Add(new { Codigo = txtCodServico.Text, Servico = txtNomeServico.Text, Quantidade = txtQuantidadeServico.Text, Preco = txtPrecoUniServico.Text });

I’d like to take the values of lista, but I’m not getting it. I was trying that way:

foreach (var listServico in listServicos)
{                
    var codigo = listServico.Codigo;               
}

Visual Studio shows error:

Answer 1

I still haven’t found a more suitable solution, just one using ExpandoObject:

dynamic obj = new ExpandoObject();
obj.Codigo = "Código";
obj.Servico = "Serviço";
obj.Quantidade = "Quantidade";
obj.Preco = "Preço";
var listServicos = new List<dynamic>{ obj };
WriteLine(listServicos[0].Codigo);

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

I wonder if you really need this. It may be that the solution is simpler than this. It is rare that someone needs something really dynamic.

This could be the solution:

var list = Enumerable.Empty<object>()
             .Select(r => new { Codigo = "Codigo", Servico = "Servico", Quantidade = "Quantidade", Preco = "Preco" })
             .ToList();
list.Add(new { Codigo = "Codigo", Servico = "Servico", Quantidade = "Quantidade", Preco = "Preco" });
WriteLine(list[0].Codigo);

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

Another solution is to generalize rather than streamline:

public static void Main() {
    var list = ToAnonymousList(new { Codigo = "Codigo", Servico = "Servico", Quantidade = "Quantidade", Preco = "Preco" });
    WriteLine(list[0].Codigo);
}
public static IList<T> ToAnonymousList<T>(params T[] items) => items;

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

I found these in the OS.

Without needing an auxiliary method:

var list = new[] { new { Codigo = "Codigo", Servico = "Servico", Quantidade = "Quantidade", Preco = "Preco" } }.ToList();
WriteLine(list[0].Codigo);

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

Answer 2

1 - Add the reference to Microsoft.Csharp.

If you already have the reference, remove and insert again.

Look that answer, I believe I can help you.

2 - Another possible solution is to change the framework from 4.5 to 4.5.1. (Source) Just go to Web.config and change:

<compilation debug="true" targetFramework="4.5" />
<httpRuntime targetFramework="4.5" />

for:

<compilation debug="true" targetFramework="4.5.1" />
<httpRuntime targetFramework="4.5.1" />

rebuild.

3 - Another attempt is to change the Copy Local = True for reference to Microsoft.CSharp