xyh2732 同志问如何将若干相加的控件值都控制在一定范围内,使得其合计限制为万元以下。这是一个动态控制有效性规则的问题,可以通过控件的获得焦点事件加以解决。如果控件比较多的话,需要在窗体的加载事件中,将一个有效性规则设置的函数,赋值给各个控件的获得焦点事件。这样可以省去逐个写控件的焦点事件。在此例中由于控件名称有一定的规律性,因此加载事件可以写的比较简单。如果控件的名称没有规律性,则需要在加载事件中,加入对控件名称筛选的判断语句。
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Private Sub Form_Load()
Dim ctls As Controls
Dim ctl As Control
Set ctls = Me.Form.Controls
For Each ctl In ctls
If Asc(ctl.Name) >= Asc("A") And Asc(ctl.Name) <= Asc("F") Then
ctl.OnGotFocus = "=AllOnGotFocus('" & ctl.Name & "')"
End If
Next ctl
End Sub
Function AllOnGotFocus(ctlName As String)
Dim ctls As Controls
Dim ctl As Control
Dim S As Single
Set ctls = Me.Form.Controls
For Each ctl In ctls
If Asc(ctl.Name) >= Asc("A") And Asc(ctl.Name) <= Asc("F") Then
If ctl.Name <> ctlName Then
S = S + Nz(ctl.Value, 0)
End If
End If
Next ctl
S = 10000 - S
ctls(ctlName).ValidationRule = "<" & S
End Function