//角色类别（下拉框）
private void selectRole()
{
List <SelectListItem> list = new List <SelectListItem>();
var dt = irb.SelectAll();
foreach (var dr in dt)
{
SelectListItem cl = new SelectListItem()
{
Value = dr.RoleID.ToString(),
Text = dr.RoleName.ToString()
};
list.Add(cl);
}
ViewData["role"] = list;
}