vb.net 如何检查字符串是否在 Visual Basic 中的数组中？

How do I check to see if a string is within an array in Visual Basic?

提问by Matt Elhotiby

I am a PHP developer and not a Visual Basic person.

我是一名 PHP 开发人员，而不是 Visual Basic 人员。

I have an array:

我有一个数组：

Dim ShippingMethod() As String = {"Standard Shipping", "Ground EST"}
Dim Shipping as String = "Ground EST"

How do I do an ifstatement that will check if the string Shippingis in the ShippingMethod()array?

如何执行if检查字符串Shipping是否在ShippingMethod()数组中的语句？

回答by vcsjones

Use Contains:

使用Contains：

If ShippingMethod.Contains(Shipping) Then
    'Go
End If

That implies case-sensitivity. If you want case insensitive:

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

回答by rbassett

I get the error 'Contains' is not a member of 'String()'if I try the above answer.

'Contains' is not a member of 'String()'如果我尝试上述答案，我会收到错误消息。

Instead I used IndexOf:

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by codingg

Answer:

回答：

Dim things As String() = {"a", "b", "c"}
If things.Contains("a") Then
    ' do things
Else
    ' don't do things
End If