adding 2 selectList aspMvc - asp.net-mvc

Question

I've got two ViewBag there and I would like to make one
in that way I can get the 2 different address of the customer shown in one DropDownList
....
var customerAdress = from cl2 in dc.Adresses
where cl2.Customer.User.UserEmail == User.Identity.Name
select cl2;
var Adresses = new SelectList(customerAdress.ToList(), "AdressID", "AdressLine1 ", null);
var Adresses2 = new SelectList(customerAdress.ToList(), "AdressID", "AdressLine2", null);
....
there is my View:
....
<tr>
<td>Address</td>
<td colspan="3">
#Html.DropDownList("Adresses", (IEnumerable<SelectListItem>)(ViewBag.Adresses))
</td>
</tr>
.....

Answer 1

You would need to concatenate them to be shown in one dropdown list like:
var addressesList = customerAdress
Select(x=> new
{
ID = x.AddressID,
AddressLine = x.AddressLine1 + x.AddressLine2
});
ViewBag.Adresses = new SelectList(addressesList.ToList() , "AdressID", "AddressLine ", null);
and do not set the DropDownList helper name same as your ViewBag key, they should be different to prevent unexpected behaviors.
And in view do like:
#Html.DropDownList("SelectAddress",ViewBag.Adresses as SelectList,"Select Address")
When you set the name of the DropDownList helper to be the same as ViewBag key it will look for a key in the ViewBag for populating the DropDownList items, in that case you would need to just specify name to be same as ViewBag key:
Html.DropDownList("Adresses","Select Address")
Hope it helps!

Answer 2

my question wasn't clear it contained already a try of solution which may have mislead all the solution i've got
so here my solution i just used Group property on SelectListItem
my controller
....
var customerAdress = from cl2 in dc.Adresses
where cl2.Customer.User.UserEmail == User.Identity.Name
where cl2.Commands.FirstOrDefault().DeliveryAdressID==cl2.AdressID
select cl2;
var addressesList = customerAdress.
Select(x => new
{
ID = x.AdressID,
AddressLine = x.AdressLine1
});
var addressesList2 = customerAdress.
Select (x => new
{
ID = x.AdressID,
AddressLine = x.AdressLine2
}) ;
var allAdress = new List<SelectListItem>();
var group1 = new SelectListGroup() { Name = "DeliverableAdress" };
foreach (var item in addressesList)
{
allAdress.Add(new SelectListItem() { Text = item.AddressLine, Group = group1 });
}
foreach (var item in addressesList2)
{
allAdress.Add(new SelectListItem() { Text = item.AddressLine, Group = group1 });
}
//var Adresses = new SelectList(addressesList.ToList(), "AdressID", "AddressLine ", null);
ViewBag.allAdress = allAdress;
....
and my view
....
<tr>
<td>Address</td>
<td colspan="3">
#Html.DropDownList("allAdress", (IEnumerable<SelectListItem>)ViewBag.allAdress)
</td>
</tr>
....
but actually i misunderstood it the right idea is t concatenate the 2 adresslines because it's just details of one address and no 2 address as i thought