如何从对象数组中过滤字符串

Question

我有一个像这样的对象数组：

 object[] test = {
        "Rock Parrot",
        "Crimson Rosella",
        "Regent Parrot",
        "Superb Parrot",
        "Red Lory",
        "African Emerald Cuckoo",
        1,2,3


};

如何过滤此数组并仅获取字符串数组。

由于

Answer 1

你可以这样做：

var stringsOnly = test.OfType<String>().ToArray()

Answer 2

string[] stringArray = test.Where(element => element is string).Cast<string>().ToArray();

Answer 3

你可以这样做：

object[] test = {
        "Rock Parrot",
        "Crimson Rosella",
        "Regent Parrot",
        "Superb Parrot",
        "Red Lory",
        "African Emerald Cuckoo",
        1,2,3};

List<string> s = new List<string>();

foreach (var item in test)
{

    if (typeof(string) == item.GetType())
        s.Add(item.ToString());
}

如果您运行此代码，则响应：

Rock Parrot
Crimson Rosella
Regent Parrot
Superb Parrot
Red Lory
African Emerald Cuckoo

您可以转换为数组：

var a = s.ToArray();