是否可以使用TreeView
而非IComparer<T>
对IComparer
集合进行排序?毕竟它们都是TreeNode
值,对吗?
答案 0 :(得分:2)
如果您的意思是通过TreeViewNodeSorter
,那么它必须是IComparer
(简而言之,它早于泛型)。你可以写一些东西,但这可能不值得麻烦......
public static class ComparerWrapper
{ // extension method, so you can call someComparer.AsBasicComparer()
public static IComparer AsBasicComparer<T>(this IComparer<T> comparer)
{
return comparer as IComparer
?? new ComparerWrapper<T>(comparer);
}
}
sealed class ComparerWrapper<T> : IComparer
{
private readonly IComparer<T> inner;
public ComparerWrapper(IComparer<T> inner)
{
if (inner == null) throw new ArgumentNullException("inner");
this.inner = inner;
}
int IComparer.Compare(object x, object y)
{
return inner.Compare((T)x, (T)y);
}
}
答案 1 :(得分:2)
让我感到震惊的一件事是IComparer来自System.Collections,而IComparer来自System.Collections.Generic。
我原本只有
using System.Collections.Generic;
并得到编译错误:
Cannot implicitly convert type 'MyApp.NodeSorter' to 'System.Collections.IComparer'. An explicit conversion exists (are you missing a cast?)
解决方案是添加
using System.Collections;