Linq错误.
//testDataContext test=new testDataContext ();
// var query1 = from t in test .TeacherInfo select t.TeaBirth.Value.Year.ToString();
// DropDownList1.DataSource = query1;
// DropDownList1.DataBind();
错在哪里？

[解决办法]
var query1 = from t in test.TeacherInfo select t.TeaBirth;
foreach(string q in query1)
{
ListItem item =new ListItem();
item.value = q.TeaBirth.Value.Year.ToString();
DropDownList1.Items.Add(item);
}