在 Excel VBA 中合并私有子函数

Question

我编写了三个不同的 Private Sub 函数，它们都做同样的事情 Private Sub txt_noRooms_KeyPress 和 Private Sub txt_length_KeyPress 确保用户只能在引用的文本字段中输入值 1 到 9，而 Private Sub txt_studentNo_KeyPress 允许用户在引用的文本字段中输入值 0 到 9。

有什么方法可以合并这三个函数，让它们仍然支持引用的单元格并保持相同的条件？我想这样做是为了使代码更高效。

Private Sub txt_noRooms_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)
' Restrict entry to txt_noRooms
Select Case KeyAscii
    Case Asc("1") To Asc("9")
    Case Asc("-")
        If InStr(1, Me.txt_noRooms.Text, "-") > 0 Or Me.txt_noRooms.SelStart > 0 Then
            KeyAscii = 0
        End If
    Case Asc(".")
        If InStr(1, Me.txt_noRooms.Text, ".") > 0 Then
            KeyAscii = 0
        End If
    Case Else
        KeyAscii = 0
End Select
End Sub


Private Sub txt_length_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)   
' Restrict entry to txt_length
Select Case KeyAscii
    Case Asc("1") To Asc("9")
    Case Asc("-")
        If InStr(1, Me.txt_length.Text, "-") > 0 Or Me.txt_length.SelStart > 0 Then
            KeyAscii = 0
        End If
    Case Asc(".")
        If InStr(1, Me.txt_length.Text, ".") > 0 Then
            KeyAscii = 0
        End If
    Case Else
        KeyAscii = 0
End Select
End Sub


Private Sub txt_studentNo_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)
' Restrict entry to txt_studentNo
Select Case KeyAscii
    Case Asc("0") To Asc("9")
    Case Asc("-")
        If InStr(1, Me.txt_studentNo.Text, "-") > 0 Or Me.txt_studentNo.SelStart > 0 Then
            KeyAscii = 0
        End If
    Case Asc(".")
        If InStr(1, Me.txt_studentNo.Text, ".") > 0 Then
            KeyAscii = 0
        End If
    Case Else
        KeyAscii = 0
End Select
End Sub

Answer 1

您可以设置一个私有函数并从每个按键调用它：

  Private Sub txt_noRooms_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)
' Restrict entry to txt_noRooms
If bclearfield(CLng(KeyAscii), Me.txt_noRooms.Text, Me.txt_noRooms.selStart,"1")  Then KeyAscii = 0
End Sub


Private Sub txt_length_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)
' Restrict entry to txt_length
If bclearfield(CLng(KeyAscii), Me.txt_length.Text, Me.txt_length.selStart,"1") Then KeyAscii = 0
End Sub

Private Sub txt_studentNo_KeyPress(ByVal KeyAscii As MSForms.ReturnInteger)
' Restrict entry to txt_studentNo
If bclearfield(CLng(KeyAscii), Me.txt_studentNo.Text, Me.txt_studentNo.selStart,"0") Then KeyAscii = 0
End Sub

Private Function bClearField(KeyAscii As Long, sText As String, lSelStart As Long,sLowLimit as string) As boolean

bClearField=false
Select Case KeyAscii
    Case Asc(sLowLimit ) To Asc("9")
    Case Asc("-")
        If InStr(1, sText, "-") > 0 Or lSelStart > 0 Then
            bClearField=true
        End If
    Case Asc(".")
        If InStr(1, sText, ".") > 0 Then
            bClearField=true
        End If
    Case Else
        bClearField=true
End Select

End Function