使用Excel VBA创建下拉列表

Question

I want to create a drop-down list in Cell E5 .

My range of values for the drop-down should come from Range(A1:A5) in Sheet2 and Range(C1:C7) in Sheet2 . However, my code below is not working, it runs an error 1004 at Add xlValidateList, xlValidAlertStop, Operator:=xlBetween, Formula1:="=Sheet2!$A$1:$A$5 & Sheet2!$C$1:$C$7" I suspect it has something to do with this line... Formula1:="=Sheet2!$A$1:$A$5 & Sheet2!$C$1:$C$7" . Does anyone know how I can add two ranges into my Formula1 ?

Also, I dont want the blanks in the ranges to appear in the Drop-down list but .IgnoreBlank = True still shows the blanks in the drop-down list. This is my code thus far, any help is genuinely appreciated:

Private Sub Worksheet_SelectionChange(ByVal Target As Range)

If Not Intersect(Target, Range("E5")) Is Nothing Then

With Range("e5").Validation
.Add xlValidateList, xlValidAlertStop, Operator:=xlBetween, Formula1:="=Sheet2!$A$1:$A$5 & Sheet2!$C$1:$C$7"
.IgnoreBlank = True
.InCellDropdown = True
.ErrorTitle = "Warning"
.ErrorMessage = "Please select a value from the drop-down list available."
.ShowError = True

End With

End If

End Sub

Answer 1

To add multiple columns data, use a unique collection and then feed that to the DV in a comma delimited string. See this example. Change as applicable.

Sub Sample()
    Dim col As New Collection
    Dim rng As Range
    Dim i As Long
    Dim DVList As String

    '~~> Loop through the data range
    For Each rng In Sheet2.Range("A1:A5,C1:C5")
        '~~> Ignore blanks
        If Len(Trim(rng.Value)) <> 0 Then
            '~~> Create a unique list
            On Error Resume Next
            col.Add rng.Value, CStr(rng.Value)
            On Error GoTo 0
        End If
    Next rng

    '~~> Concatenate with "," as delimiter
    For i = 1 To col.Count
        DVList = DVList & col.Item(i) & ","
    Next i

    '~~> Feed it to the DV
    With Sheet1.Range("E5").Validation
        .Delete
        .Add Type:=xlValidateList, _
        AlertStyle:=xlValidAlertStop, _
        Formula1:=DVList
    End With
End Sub

Answer 2

the property Formula1:=" Expression " does not allow splitted tables. As Siddharth Rout wrote - as a work aorund - first you have to collect all values in a single table or a string.

Also the IgnoreBlank property does not ignore blanks, but is considering the cell value as valid even the cell content is blank. So, while collecting table content skip blank cells.