如何在ASP.NET MVC2中枚举formcollection

Question

我以前使用过如何在ASP.NET MVC中枚举formcollection？的实施,但现在我在VS2010和MVC2抱怨:

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.

但是我仍然对它为何在版本之间发生变化感兴趣.

Answer 1

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]);

收集后添加了Linebreak.用于格式化