我以前使用How can a formcollection be enumerated in ASP.NET MVC?的实现,但现在我在VS2010和MVC2上抱怨:
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。
由于
我通过使用:
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。
答案 0 :(得分:14)
我通过使用:
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