string 将字符串转换为字符数组
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Converting a string to a char array
提问by Isuru
Let's say I have a string like this.
假设我有一个这样的字符串。
Dim str As String = "code"
I need to break this string down to an array of characters like this,
我需要将此字符串分解为这样的字符数组，
{"c", "o", "d", "e"}
How can I do this?
我怎样才能做到这一点？
回答by Tim Schmelter
Every string is an implicit char-array. So you can get the 3rd char by:
每个字符串都是一个隐式的字符数组。所以你可以通过以下方式获得第三个字符：
Dim char3 = str(2)
Edit: Just for the sake of completeness. You can also use String.ToCharArrayto convert the string instance to a new char-arrayinstance. The core benefit of using ToCharArrayis that the char-array you receive is mutable, meaning you can actually change each individual character.
编辑：只是为了完整性。您还可以使用String.ToCharArray将字符串实例转换为新char-array实例。使用的核心好处ToCharArray是您收到的字符数组是可变的，这意味着您实际上可以更改每个字符。
Note that you could also use LINQ. If you for example want the first three characters of a String:
请注意，您也可以使用LINQ. 例如，如果您想要字符串的前三个字符：
Dim firstThree As Char() = str.Take(3).ToArray()
回答by cHao
dim chars as Char() = str.ToCharArray()
回答by whytheq
Referencing @AlexeiLevenkov,
参考@AlexeiLevenkov，
You can use String.ToCharArrayto convert it to array of characters, or use ToArrayif you like LINQ more:
Dim delimStr As String = " ,.:" Dim delimiter As Char() = delimStr.ToCharArray() "foo".ToArray()
您可以使用 String.ToCharArray将其转换为字符数组， 如果您更喜欢 LINQ ，则可以使用 ToArray：
Dim delimStr As String = " ,.:" Dim delimiter As Char() = delimStr.ToCharArray() "foo".ToArray()
(I added the above alternative as the duplicate question will be soon closed; it is worth keeping the LINQalternative.)
（我添加了上述替代方案，因为重复的问题将很快关闭；保留LINQ替代方案是值得的。）
回答by Shawn
I did some benchmarking and ToCharArray is approximately 30 times faster than LINQ's ToArray.
我做了一些基准测试，ToCharArray 比 LINQ 的 ToArray 快大约 30 倍。
回答by Shree
Try:
尝试：
Dim str As String = "code"
' Use For Each loop on string.
For Each element As Char In str
Console.WriteLine(element)
