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标题：[求助]从一个字符串中提取特定字符的问题
1楼
dlovef 发表于：2011/8/9 11:13:00有没有什么办法能够从诸如"一二三四五AAA00000六七八"这样的字符串中将“AAA00000”提取出来。
1，“AAA00000”格式固定，三位字母，五位数字
2，“AAA00000”出现位置不固定
2楼
yanzhen2010 发表于：2011/8/9 11:31:00以下是引用dlovef在2011-8-9 11:13:00的发言：
有没有什么办法能够从诸如"一二三四五AAA00000六七八"这样的字符串中将“AAA00000”提取出来。
有没有什么办法能够从诸如"一二三四五AAA00000六七八"这样的字符串中将“AAA00000”提取出来。
1，“AAA00000”格式固定，三位字母，五位数字
2，“AAA00000”出现位置不固定
，“AAA00000”后边的字符个数固定吗？
3楼
狐狸爸爸 发表于：2011/8/9 11:43:00Dim s As String = "一二三四五AAA00000六七八"
Dim i1 As Integer
Dim i2 As Integer
For i As Integer = 0 To s.Length -3
If s(i) = s(i+1) AndAlso s(i) = s(i+2) Then
i1 = i
Exit For
End If
Next
For i As Integer = 0 To s.Length -5
If s(i) = s(i+1) AndAlso s(i) = s(i+2) AndAlso s(i) = s(i+3) AndAlso s(i) = s(i+4) Then
i2 = i
Exit For
End If
Next
If i2 > i1 Then
messagebox.show(s.SubString(i1,8))
End If
Dim i1 As Integer
Dim i2 As Integer
For i As Integer = 0 To s.Length -3
If s(i) = s(i+1) AndAlso s(i) = s(i+2) Then
i1 = i
Exit For
End If
Next
For i As Integer = 0 To s.Length -5
If s(i) = s(i+1) AndAlso s(i) = s(i+2) AndAlso s(i) = s(i+3) AndAlso s(i) = s(i+4) Then
i2 = i
Exit For
End If
Next
If i2 > i1 Then
messagebox.show(s.SubString(i1,8))
End If
[此贴子已经被作者于2011-8-9 11:47:20编辑过]
4楼
狐狸爸爸 发表于：2011/8/9 11:46:00可以看看.net的正则表达式，会更简单点。
5楼
dlovef 发表于：2011/8/9 11:48:00回复yanzhen2010：后面的字数也不固定。
回复狐狸爸爸:"AAA00000"只是个样式，AAA代表任意三位字母，00000代表任意五位数字。所以您的这段代码好像行不通吧。
6楼
狐狸爸爸 发表于：2011/8/9 11:50:00这样简单点:
Dim s As String = "一二三四五AAA00000六七八"
For i As Integer = 0 To s.Length -3
If s(i) = s(i+1) AndAlso s(i) = s(i+2) Then
If s(i+3) = s(i+4) AndAlso s(i+3) = s(i+5) AndAlso s(i+3) = s(i+6) AndAlso s(i+3) = s(i+7) Then
messagebox.show(s.SubString(i,8))
Exit For
End If
End If
Next
7楼
dlovef 发表于：2011/8/9 12:21:00回复狐狸爸爸:"AAA00000"只是个样式，AAA代表任意三位字母，00000代表任意五位数字。所以您的这段代码好像行不通吧。 |
8楼
狐狸爸爸 发表于：2011/8/9 12:27:00Dim s As String = "一二三四五AAA00000六七八"
For i As Integer = 0 To s.Length - 8
If Char.IsLetter(s(i)) AndAlso s(i) = s(i+1) AndAlso s(i) = s(i+2) Then
If Char.IsDigit(s(i+3)) AndAlso s(i+3) = s(i+4) AndAlso s(i+3) = s(i+5) AndAlso s(i+3) = s(i+6) AndAlso s(i+3) = s(i+7) Then
messagebox.show(s.SubString(i,8))
Exit For
End If
End If
Next
For i As Integer = 0 To s.Length - 8
If Char.IsLetter(s(i)) AndAlso s(i) = s(i+1) AndAlso s(i) = s(i+2) Then
If Char.IsDigit(s(i+3)) AndAlso s(i+3) = s(i+4) AndAlso s(i+3) = s(i+5) AndAlso s(i+3) = s(i+6) AndAlso s(i+3) = s(i+7) Then
messagebox.show(s.SubString(i,8))
Exit For
End If
End If
Next
9楼
xongyijd 发表于：2011/8/9 12:29:00以下是引用狐狸爸爸在2011-8-9 11:50:00的发言：
这样简单点:
Dim s As String = "一二三四五AAA00000六七八"
For i As Integer = 0 To s.Length -3
If s(i) = s(i+1) AndAlso s(i) = s(i+2) Then
If s(i+3) = s(i+4) AndAlso s(i+3) = s(i+5) AndAlso s(i+3) = s(i+6) AndAlso s(i+3) = s(i+7) Then
messagebox.show(s.SubString(i,8))
Exit For
End If
End If
Next
弄糊涂了，狐狸爸爸能不能用解释含义
10楼
dlovef 发表于：2011/8/9 13:02:00狐爸，以下代码执行后结果是这样的？请问是什么原因？
此主题相关图片如下：截图05.jpg
Dim s As String = "一二三四五AAA00000六七八"
Dim str As String
For i As Integer = 1 To s.Length-8
str = Mid(s,i,8)
If Char.IsLetter(Left(str,3)) And Char.IsNumber(Right(str,5)) Then
Output.Show(str)
End If
Next
结果
此主题相关图片如下：截图05.jpg