字符串类的视觉基础 [英] string class visual basic

问题描述

Dim strmystring as stirng = "record0030040acd035a856ab"

在这种情况下，我想找到040(但可能是034或856)

In this case I want to find 040 (but it could be 034 or 856)

Dim I as interger = strmystring.indexof("040")
Next ouput the substring
Dim strsubstring as string = strmystring.substring(i)

现在我的表情看起来像"040acd035a856ab"
有了这个字符串，我如何输出休憩:
040a
040c
040d

因此，我想使用040之后的字母，请多加考虑.

Now my stirng looks like "040acd035a856ab"
With this string how can I output the fallowing:
040a
040c
040d

So I want the alphabets after 040, appreciate any ideas.

推荐答案

如果您只需要接下来的4个字符...则将您的子字符串行更改为: br/>

If you know it only needs the next 4 characters...change your substring line to this:

Dim strsubstring as string = strmystring.substring(i,4)

子字符串函数的第二个parm表示您要提取接下来的4个字符.

---糟糕...我对您的问题听不清...

您需要像以前一样拉动整个过程.我猜想您可以遍历字符串并查找第一个字母是alpha ...您可以使用 ^ ]函数.或者您可以找出一种使用正则表达式的方法.

这是 CP文章 [

The second parm on the substring function means you want to pull the next 4 characters.

--- oops...I didn''t read your question well enough...

You''ll need to pull the whole thing like you did before. I suppose then you could loop through the string and look for the first character that is alpha...you could use the IsNumeric[^] function. Or you could figure out a way to do it with regular expressions.

Here are google results[^] for regular expressions. Here are CP Articles[^] for regular expressions. These should help you get started.

我已经写了:

I have written it:

Module Module1

    Sub Main()
        Dim Str = "record0030040acd035a856ab"
        Dim I = Str.IndexOf("040")

        For a = I + 3 To Str.Length - 1
            Dim Chr = Str(a)

            If Char.IsLetter(Chr) Then
                Console.WriteLine("040" + Chr)
            Else
                Exit For
            End If
        Next
    End Sub

End Module

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