如何在visual basic中声明和访问数组?

时间:2011-10-05 22:53:11

标签: vb.net

我声明了一个字符串数组,并将每个元素初始化为“5”。但是当我在For-Each之后用断点调试时,我的所有数组成员都没有Nothing。我在Visual Studio 2010上。请帮忙吗?

Dim words(999) As String

For Each word As String In words
    word = "5"
Next

2 个答案:

答案 0 :(得分:3)

你所拥有的东西对阅读数组有好处,但不适合写它们。您的代码转换为:

Create words array with 1000 elements
For each index in the array
    word = words(index)
    word = "5"
Next index

它决不会将这个词放回数组中。代码丢失了:

    ...
    words(index) = word
Next index

您需要做的是:

Dim words(999) As String

For index As Integer = 0 to words.Length - 1
    words(index) = "5"
Next

修改:回复以下评论。

初始化数组后,可以使用For / Each循环读取元素。

For Each word As String in words
    Console.WriteLine(word)
Next

这与:

相同
For index As Integer = 0 To words.Length - 1
    Console.WriteLine(words(index))
Next

答案 1 :(得分:1)

你也可以这样做:

Dim Words() As String = Enumerable.Repeat("5", 1000).ToArray()