.xlsm文件,在模板中写入vba,然后用excel图形界面设置下拉数据有效性,可以使用,但用poi设置就不行
另外vba没有涉及到的列,poi用同样的方法设置有效性就可以
请教各路大神,有没有什么解决办法,其实就是想在excel里面设置一列下拉框可多选,下拉数据需要从数据库na
模板中的VBA如下,为第7列数据设置可多选的下拉框
Option Explicit
Sub Worksheet_Change(ByVal Target As Range)
'让数据有效性选择 可以多选,重复选
Dim rngDV As Range
Dim oldVal As String
Dim newVal As String
If Target.Count > 1 Then GoTo exitHandler
On Error Resume Next
Set rngDV = Cells.SpecialCells(xlCellTypeAllValidation)
On Error GoTo exitHandler
If rngDV Is Nothing Then GoTo exitHandler
If Intersect(Target, rngDV) Is Nothing Then
'do nothing
Else
Application.EnableEvents = False
newVal = Target.Value
Application.Undo
oldVal = Target.Value
Target.Value = newVal
If Target.Column = 8 Then '这里规定好哪一列的数据有效性是多选的,A列是第1列,依次类推,如3就是C列,7就是G列
If oldVal = "" Then
'do nothing
Else
If newVal = "" Then
'do nothing
Else
If InStr(1, oldVal, newVal) <> 0 Then '重复选择视同删除
If InStr(1, oldVal, newVal) + Len(newVal) - 1 = Len(oldVal) Then '最后一个选项重复
Target.Value = Left(oldVal, Len(oldVal) - Len(newVal) - 1)
Else
Target.Value = Replace(oldVal, newVal & ",", "") '不是最后一个选项重复的时候处理逗号
End If
Else '不是重复选项就视同增加选项
Target.Value = oldVal & "," & newVal
' NOTE: you can use a line break,
' instead of a comma
' Target.Value = oldVal _
' & Chr(10) & newVal
End If
End If
End If
End If
End If
exitHandler:
Application.EnableEvents = True
End Sub
然后使用poi导入此模板,为这一列数据添加有效性,执行后download下来却没有下拉框:
CellRangeAddressList addressList = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol);
DataValidationHelper dvHelper = sheet.getDataValidationHelper();
XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint) dvHelper
.createExplicitListConstraint(explicitListValues);
XSSFDataValidation validation = (XSSFDataValidation) dvHelper.createValidation(dvConstraint, addressList);
sheet.addValidationData(validation);