数组列表列出< T>?
我怎么可以转换/转储一个ArrayList到一个列表?我使用ArrayList的,因为我使用的是ASP.NET配置文件功能,它看上去像一个痛苦的列表存储在配置文件中。
How can I convert/dump an arraylist into a list? I'm using arraylist because I'm using the ASP.NET profiles feature and it looked like a pain to store List in profiles.
请注意: 另一种选择是将包裹列到自己的类和ArrayList的废除。
Note: The other option would be to wrap the List into an own class and do away with ArrayList.
http://www.i$p$pferjim.com/site/2009/04/storing-generics-in-asp-net-profile-object/
要转换的的ArrayList
全类型的对象 T 会是这样(假设你使用.NET 3.5或更高版本):
The easiest way to convert an ArrayList
full of objects of type T
would be this (assuming you're using .NET 3.5 or greater):
List<T> list = arrayList.Cast<T>().ToList();
如果您使用的是3.0或更早版本,你必须自己循环:
If you're using 3.0 or earlier, you'll have to loop yourself:
List<T> list = new List<T>(arrayList.Count);
foreach(T item in arrayList) list.Add(item);