vb.net If 多个值的条件
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If Condition for multiple values
提问by Chow.Net
I have a dropdown list where i have list of values from 0 TO 9
我有一个下拉列表，其中包含 0 到 9 的值列表
If the selected value is 1,2,3,4 or 5 then EmployeeName field cannot be blank.
如果所选值为 1、2、3、4 或 5，则 EmployeeName 字段不能为空。
Please help me to write this condition in vb.net.
请帮我在 vb.net 中写这个条件。
Thanks in advance
提前致谢
回答by Matt Wilko
I think your best bet is to use a Selectstatement. This makes it easy to maintain your code if you change what each value does:
我认为最好的办法是使用Select声明。如果您更改每个值的作用，这可以轻松维护您的代码：
Select Case CInt(ComboBox.Value)
Case 1 To 5
'Employee field cannot be blank
Case Else
'Employee field can be blank
End Select
回答by Grant Thomas
You can string multiple conditions together in one, such that:
您可以将多个条件串成一个，例如：
If (thing = 1 OrElse thing = 2 OrElse thing = 3 OrElse thing = 4 OrElse thing = 5)
End IF
However, you could add these values to a whitelist, and do an Anyor Containscheck. You could of course to a lower thanand greater thancomparison to constrain, but I didn't risk that without enough detail.
但是，您可以将这些值添加到白名单中，然后执行Any或Contains检查。您当然可以使用小于和大于比较来进行约束，但如果没有足够的细节，我不会冒险这样做。
回答by marc casas
if SelectedValue <= 5 And SelectedValue >= 1 then
' EmployeeName cannot be blank
