C# 将字符串数组转换为 List<string>
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Convert array of strings to List<string>
提问by Nick Rolando
I've seen examples of this done using .ToList()on array types, this seems to be available only in .Net 3.5+. I'm working with .NET Framework 2.0 on an ASP.NET project that can't be upgraded at this time, so I was wondering: is there another solution? One that is more elegant than looping through the array and adding each element to this List (which is no problem; I'm just wondering if there is a better solution for learning purposes)?
我已经看到使用.ToList()数组类型完成此操作的示例，这似乎仅在 .Net 3.5+ 中可用。我在一个目前无法升级的 ASP.NET 项目上使用 .NET Framework 2.0，所以我想知道：还有其他解决方案吗？一种比循环遍历数组并将每个元素添加到此 List 更优雅的方法（这没问题；我只是想知道是否有更好的解决方案用于学习目的）？
string[] arr = { "Alpha", "Beta", "Gamma" };
List<string> openItems = new List<string>();
foreach (string arrItem in arr)
{
openItems.Add(arrItem);
}
If I have to do it this way, is there a way to deallocate the lingering array from memory after I copy it into my list?
如果我必须这样做，有没有办法在我将它复制到我的列表后从内存中释放它？
采纳答案by Dmytro Shevchenko
Just use this constructorof List<T>. It accepts any IEnumerable<T>as an argument.
只要使用此构造的List<T>。它接受 anyIEnumerable<T>作为参数。
string[] arr = ...
List<string> list = new List<string>(arr);
回答by andrew.fox
From .Net 3.5 you can use LINQ extension method that (sometimes) makes code flow a bit better.
从 .Net 3.5 开始，您可以使用 LINQ 扩展方法（有时）使代码流更好一点。
Usage looks like this:
用法如下所示：
using System.Linq;
// ...
public void My()
{
var myArray = new[] { "abc", "123", "zyx" };
List<string> myList = myArray.ToList();
}
PS. There's also ToArray()method that works in other way.
附注。还有ToArray()一种方法可以以其他方式工作。
