通过VBA,当在EXCEL单元格中输入任意的日期格式时,都能自动转换为指定的标准格式的日期值

通过VBA,当在EXCEL单元格中输入任意的日期格式时,都能自动转换为指定的标准格式的日期值

在日常录入EXCEL表格的单元格里 ,我们输入一些一般性的日期内容,如:2017-10-17 或 2017/10/17时,EXCEL会自动识别为日期并按单元格设计格式显示,单元格中存储的值也是日期格式的值。

但我们进行不规范的日期输入时,如在单元格中输入:2017.10.10或2017。10。10或20171010时,EXCEL不会自动识别这些内容为日期,而只会识别为字符串(文本),且在单元格中存储的也只是文本而已。

我们通过编写VBA代码可以轻松解决此问题,让EXCEL完美识别输入的任何日期内容,不管是20171010或2017.10.10还是201711或20170101或2017131都可被正确识别,而且是直接将单元格中存储的值转换为日期值,不仅仅是显示格式的转换。


闲话不说,直接让VBA代码:

(要录入VBA代码,必须通过EXCEL进入VBA编辑器,这部分内容可搜索下)

'以下代码都要放到一个sheet的类模块之中 Dim nDate
Private Sub Worksheet_Activate()'加载sheet的事件
    nDate = InputBox("请确定此工作表中第几列为日期型的数据!", "输入数字", "2")
    If nDate = "" Then
        nDate = 2 '--只操作指定的列号的列,目前只操作B列(第2列) Else
        nDate = Val(nDate)
    End If 
End Sub
 Private Sub Worksheet_Change(ByVal Target As Range)'--sheet中任何地方发生数据改变时触发的事件 If nDate = 0 Then Exit Sub If Target.Cells.Column = nDate Then '--如果是第二列才检验文本为日期
        Target.Value = TryChangeDate2(Target.Value)
    End If 
End Sub 
Public Function TryChangeDate2(ByVal strDATEcome As String) As Variant
    On Error GoTo TryChangeDate2ERR
    Dim strDATE As String
    strDATE = Trim(strDATEcome)
    Dim myDate As Date Dim strK As String
    strK = mTrim(strDATEcome)
    Dim k As Integer, nkkkk As Integer
    k = -1
    k = 0
    myDate = DateValue(strDATE)
    myDate = Format(myDate, "yyyy/m/d")
    TryChangeDate2 = myDate
    Exit Function
    k = 1
    myDate = DateValue(strDATE)
    myDate = Format(myDate, "yyyy/m/d")
    TryChangeDate2 = myDate
    Exit Function
TryChangeDate2ERR:
    Err.Clear
    If k = 0 Then
        nkkkk = Len(strK)
        Select Case nkkkk
            Case 4 If InStr(1, strK, ".") = 0 And InStr(1, strK, ",") = 0 And InStr(1, strK, "/") = 0 And InStr(1, strK, "\") = 0 And InStr(1, strK, "-") = 0 Then
                    strDATE = Left(strK, 2) & "/" & Mid(strK, 3, 1) & "/" & Mid(strK, 4, 1)
                End If Case 5 If InStr(1, strK, ".") = 0 And InStr(1, strK, ",") = 0 And InStr(1, strK, "/") = 0 And InStr(1, strK, "\") = 0 And InStr(1, strK, "-") = 0 Then If Val(Mid(strK, 3, 1)) >= 3 Then
                        strDATE = Left(strK, 2) & "/" & Mid(strK, 3, 1) & "/" & Mid(strK, 4, 2)
                        strDATE = Left(strK, 2) & "/" & Mid(strK, 3, 2) & "/" & Mid(strK, 5, 1)
                    End If End If Case 6 If InStr(1, strK, ".") = 0 And InStr(1, strK, ",") = 0 And InStr(1, strK, "/") = 0 And InStr(1, strK, "\") = 0 And InStr(1, strK, "-") = 0 Then If Left(strK, 1) = "1" Or Left(strK, 1) = "2" Then
                        strDATE = Left(strK, 4) & "/" & Mid(strK, 5, 1) & "/" & Mid(strK, 6, 1)
                        strDATE = Left(strK, 2) & "/" & Mid(strK, 3, 2) & "/" & Mid(strK, 5, 2)
                    End If GoTo theEnd
                End If
                    strDATE = Left(strK, 2) & "/" & Mid(strK, 4, 1) & "/" & Mid(strK, 6, 1)
            Case 7 If InStr(1, strK, ".") = 0 And InStr(1, strK, ",") = 0 And InStr(1, strK, "/") = 0 And InStr(1, strK, "\") = 0 And InStr(1, strK, "-") = 0 Then If Val(Mid(strK, 5, 1)) >= 3 Then
                        strDATE = Left(strK, 4) & "/" & Mid(strK, 5, 1) & "/" & Mid(strK, 6, 2)
                        strDATE = Left(strK, 4) & "/" & Mid(strK, 5, 2) & "/" & Mid(strK, 7, 1)
                    End If Else If Val(Mid(strK, 4, 1)) >= 3 Then
                        strDATE = Left(strK, 2) & "/" & Mid(strK, 4, 1) & "/" & Mid(strK, 6, 2)
                        strDATE = Left(strK, 2) & "/" & Mid(strK, 4, 2) & "/" & Mid(strK, 7, 1)
                    End If End If Case 8 If InStr(1, strK, ".") = 0 And InStr(1, strK, ",") = 0 And InStr(1, strK, "/") = 0 And InStr(1, strK, "\") = 0 And InStr(1, strK, "-") = 0 Then
                    strDATE = Left(strK, 4) & "/" & Mid(strK, 5, 2) & "/" & Mid(strK, 7, 2)
                    strDATE = Left(strK, 4) & "/" & Mid(strK, 6, 1) & "/" & Mid(strK, 8, 1)
                End If Case 9 If Val(Mid(strK, 6, 1)) >= 3 Then
                    strDATE = Left(strK, 4) & "/" & Mid(strK, 6, 1) & "/" & Mid(strK, 8, 2)
                    strDATE = Left(strK, 4) & "/" & Mid(strK, 6, 2) & "/" & Mid(strK, 9, 1)
                End If Case 10
                strDATE = Left(strK, 4) & "/" & Mid(strK, 6, 2) & "/" & Mid(strK, 9, 2)
        End Select
theEnd:
        GoTo k1
    End If
    TryChangeDate2 = strDATEcome
End Function
 Public Function mTrim(ByVal strCome As String) As String '--此函数的作用是去掉字符串中间的空格 On Error GoTo mTrimErr
    Dim i As Integer, j As Integer Dim strLS As String, k As String * 1, strResult As String
    strLS = Trim(strCome)
    strResult = ""
    j = Len(strLS)
    For i = 1 To j
        k = Mid(strLS, i, 1)
        If k <> " " And k <> " " And VarType(k) <> vbNull And k <> vbNullString Then
            strResult = strResult & k
        End If Next
    mTrim = strResult
    Exit Function
mTrimErr:
    Err.Clear