Error   1   Cannot implicitly convert type 'System.Web.Mvc.IValueProvider' to 
'System.Collections.Generic.IDictionary'. An 
explicit conversion exists (are you missing a cast?)    C:\~\ProjectMVC\Controllers\TheController.cs    line    ProjectMVC

代码是……

IDictionary<string,ValueProviderResult> tmpCollection = collection.ToValueProvider();

for (int j = 1; j <= noprops; j++)
            {
                string shopNmTmp =
                    (from t in tmpCollection
                     where t.Key.StartsWith(j + ".discount.sname." + j)
                     select t.Value.AttemptedValue).First();
                string shopCdTmp =
                    (from t in tmpCollection
                     where t.Key.StartsWith(j + ".discount.sref." + j)
                     select t.Value.AttemptedValue).First();
...

当我不看时,有什么改变;这编译,工作和运行,在MVC1中没有问题;但不会在2中编译.

谢谢

更新

我通过使用以下技术来解决这个问题：

Dictionary<string,string> tmpCollection = collection.AllKeys.ToDictionary(k => k,v => collection[v]);

代替.

但是我仍然对它为什么在版本之间发生变化感兴趣.