.net 检查字符串是否不等于任何字符串列表
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时间：2020-09-03 12:16:06 来源:igfitidea点击:
Check whether a string is not equal to any of a list of strings
提问by paulopulus
Is there a way to convert some code like this:
有没有办法像这样转换一些代码：
If someString <> "02" And someString <> "03" And someString <> "06" And someString <> "07" Then
btnButton.Enabled = False
End If
kinda into something like this (multiple values for one variable)
有点像这样（一个变量有多个值）
If someString <> "02", "03", "06", "07" Then
btnButton.Enabled = False
End If
回答by Fabian Tamp
回答by Ry-
You can (ab)use Selectfor this in simple cases:
您可以（ab）Select在简单的情况下用于此：
Select Case someString
Case "02", "03", "06", "07"
Case Else
btnButton.Enabled = False
End Select
Also, a common extension that I use is:
另外，我使用的一个常见扩展是：
<Extension()>
Function [In](Of TItem, TColl)(this As TItem, ParamArray items() As TColl)
Return Array.IndexOf(items, this) > -1
End Function
So:
所以：
If Not someString.In("02", "03", "06", "07") Then
btnButton.Enabled = False
End If
回答by Johnno Nolan
Dim invalidvalues As New List(Of String) From { _
"02", _
"03,", _
"04", _
"07" _
}
If invalidvalues.Contains(x) Then
btnButton.Enabled = False
End If
回答by Paul Stevens
How about this?
这个怎么样？
Imports System.Text.RegularExpressions
btnButton.Enabled = Regex.IsMatch(someString, "^0[2367]$")
