修改SelectList项目

Question

我一直在与SelectList作斗争，并决定尝试一个简单的实验：

SelectList list = new SelectList(db.People.OrderBy(x => x.Last), "ID", "Last", sItem);
foreach (SelectListItem item in list)
{
  item.Text = item.Text.ToUpper();
}
return list;

当它到达末尾时，检查列表显示项目未被修改。怎么回事？显然这里遗漏了一些东西。

Answer 1

您可以使用linq projection创建您的SelectList项目：

var toupper = db.People.OrderBy(x => x.Last)
                       .Select(x => new
                           {   
                              Id = x.Id,  
                              Last = x.Last.ToUpper(), //Whatever you want to upper case
                              Whatever = x.Whatever
                              // Add other items you want to show in select list
                           });

SelectList list = new SelectList(toupper, "Id", "Last", sItem);

return list;