[英]How do I check to see if a string is within an array in Visual Basic?
我是一名 PHP 开发人员,而不是 Visual Basic 人员。
我有一个数组:
Dim ShippingMethod() As String = {"Standard Shipping", "Ground EST"}
Dim Shipping as String = "Ground EST"
如何执行if
语句来检查字符串Shipping
是否在ShippingMethod()
数组中?
使用Contains
:
If ShippingMethod.Contains(Shipping) Then
'Go
End If
这意味着区分大小写。 如果你想不区分大小写:
If ShippingMethod.Contains(Shipping, StringComparer.CurrentCultureIgnoreCase) Then
'Go
End If
如果我尝试上述答案,我会收到错误'Contains' is not a member of 'String()'
。
相反,我使用了IndexOf :
Dim index As Integer = Array.IndexOf(ShippingMethod, Shipping)
If index < 0 Then
' not found
End If
回答:
Dim things As String() = {"a", "b", "c"}
If things.Contains("a") Then
' do things
Else
' don't do things
End If
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