c# - Where() with Replace() in Dictionary.Where(p => p.Key is T)

Question

我有一个 System.Collections.Generic.Dictionary<System.Web.UI.Control, object>其中所有键都可以是 System.Web.UI.WebControls.HyperLink 的任一类型或类型 System.Web.UI.WebControls.Label .

我要改Text每个控件的属性。因为超链接没有实现(为什么？!)ITextControl ，我需要显式地转换标签或超链接:

Dictionary<Control,object> dic = ..

dic
  .Where(p => p.Key is HyperLink)
  .ForEach(c => ((HyperLink)c).Text = "something")

dic
  .Where(p => p.Key is Label)
  .ForEach(c => ((Label)c).Text = "something")

有没有办法解决这种方法？

Answer 1

稍微优雅一些​​，但保留问题:

foreach (HyperLink c in dic.Keys.OfType<HyperLink>())
{
    c.Text = "something";
}

foreach (Label c in dic.Keys.OfType<Label>())
{
    c.Text = "something";
}