ms-access - 访问 isnull 组合值

Question

我正在尝试检查是否为组合选择了一个值，但真正的部分（未选择任何值）抛出一个错误，指出：There is an invalid use of the . (dot) or ! operator or invalid parentheses.

If (Len(MinCombo) = 0) Then
    MsgBox "true"
Else
    MsgBox "false"
End If

I have also tried this code but it evaluates to the false part when a value is selected:

If (IsNull(MinCombo) = True) Then
    MsgBox "true"
Else
    MsgBox "false"
End If

我正在使用 MS Access Professional Plus 2010

score 0 · Accepted Answer

我是这样走的：

Me.MinCombo.SetFocus
If (Me.MinCombo.selText ="") Then
  MsgBox "true"
Else
  MsgBox "false"
End If

1 回答 1