Create Arrays

最新推荐文章于 2023-03-20 16:29:10 发布

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最新推荐文章于 2023-03-20 16:29:10 发布

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分类专栏： C# 文章标签： arrays class c#

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本文介绍了如何在C#中使用静态方法CreateInstance()来创建数组实例，特别适用于未知元素类型的场景。通过设置数组类型和大小，可以轻松地初始化数组，并进行值的设置和获取。

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The Array class is abstract, so you cannot create an array by using a constructor. However, instead
of using the C# syntax to create array instances, it is also possible to create arrays by using the static
CreateInstance() method. This is extremely useful if you don’t know the type of elements in advance,
because the type can be passed to the CreateInstance() method as a Type object.
The following example shows how to create an array of type int with a size of 5. The first argument of the
CreateInstance() method requires the type of the elements, and the second argument defines the size.
You can set values with the SetValue() method and read values with the GetValue() method.
Array intArray1 = Array.CreateInstance(typeof(int), 5);
for (int i = 0; i < 5; i++)
{
intArray1.SetValue(33, i);
}
for (int i = 0; i < 5; i++)
{
Console.WriteLine(intArray1.GetValue(i));
}