[Solved] saving record in edit view - dropdownlist

[Tim]

Hello,

im using the Dropdownlist to show some values. I want to use it in an edit view too, but im getting an error when i try to save a edited data record.

The property 'Bearbeitungsort' at 'Auftrag' could not be set to a 'null' value. You must set this property to a non-NULL value of type 'String'.

@Html.Telerik().DropDownListFor(model => model.Bearbeitungsort)
   .Name("DDLBearbeitungsort")
   .BindTo((IEnumerable<SelectListItem>)View.ListeBearbeitungsort)
   .SelectedIndex(View.ListeBearbeitungsortIndex)

Whats wrong with my code?

Regards,
Tim

[Tim]

I'm not sure what i've changed but now i get the following error:

ArgumentNullException
"dataSource" cannot be null
Parametername dataSource

[Tim]

double post.