Hinzufügen eines Elements an das Ende eines Arrays

Versuchen Sie dies [BEARBEITET]:

Dim arr() As Variant ' let brackets empty, not Dim arr(1) As Variant !

For Each a In range.Cells
    ' change / adjust the size of array 
    ReDim Preserve arr(1 To UBound(arr) + 1) As Variant

    ' add value on the end of the array
    arr (UBound(arr)) = a.value
Next

Ich löste das Problem, indem ich eine Sammlung verwendete und sie anschließend in ein Array kopierte.

Dim col As New Collection
For Each a In range.Cells
   col.Add a.Value ' dynamically add value to the end
Next
Dim arr() As Variant
arr = toArray(col) 'convert collection to an array

Function toArray(col As Collection)
  Dim arr() As Variant
  ReDim arr(0 To col.Count-1) As Variant
  For i = 1 To col.Count
      arr(i-1) = col(i)
  Next
  toArray = arr
End Function

So mache ich es, indem ich eine Variant (Array)-Variable verwende:

Dim a As Range
Dim arr As Variant 'Just a Variant variable (i.e. don't pre-define it as an array)

For Each a In Range.Cells
    If IsEmpty(arr) Then
        arr = Array(a.value) 'Make the Variant an array with a single element
    Else
        ReDim Preserve arr(UBound(arr) + 1) 'Add next array element
        arr(UBound(arr)) = a.value 'Assign the array element
    End If
Next

Oder, wenn Sie tatsächlich ein Array von Varianten benötigen (um es an eine Eigenschaft wie Shapes.Range zu übergeben, zum Beispiel), dann können Sie es so machen:

Dim a As Range
Dim arr() As Variant

ReDim arr(0 To 0) 'Allocate first element
For Each a In Range.Cells
    arr(UBound(arr)) = a.value 'Assign the array element
    ReDim Preserve arr(UBound(arr) + 1) 'Allocate next element
Next
ReDim Preserve arr(LBound(arr) To UBound(arr) - 1) 'Deallocate the last, unused element

Wenn Ihr Bereich ein einzelner Vektor ist und die Anzahl der Zeilen in einer Spalte weniger als 16.384 beträgt, können Sie den folgenden Code verwenden:

Option Explicit
Public Function toArray(RNG As Range)
    Dim arr As Variant
    arr = RNG

    With WorksheetFunction
        If UBound(arr, 2) > 1 Then
            toArray = Join((.Index(arr, 1, 0)), ",")
        Else
            toArray = Join(.Transpose(.Index(arr, 0, 1)), ",")
        End If
    End With
End Function

Dim arr() As Variant: ReDim Preserve arr(0) ' Create dynamic array

' Append to dynamic array function
Function AppendArray(arr() As Variant, var As Variant) As Variant
    ReDim Preserve arr(LBound(arr) To UBound(arr) + 1) ' Resize array, add index
    arr(UBound(arr) - 1) = var ' Append to array
End Function

Thx. Dasselbe mit 2 Funktionen tun, wenn es anderen Noobs wie mir helfen kann :

Sammlung

Function toCollection(ByVal NamedRange As String) As Collection
  Dim i As Integer
  Dim col As New Collection
  Dim Myrange As Variant, aData As Variant
  Myrange = Range(NamedRange)
  For Each aData In Myrange
    col.Add aData '.Value
  Next
  Set toCollection = col
  Set col = Nothing
End Function

1D Array :

Function toArray1D(MyCollection As Collection)
    ' See http://superuser.com/a/809212/69050

  If MyCollection Is Nothing Then
    Debug.Print Chr(10) & Time & ": Collection Is Empty"
    Exit Function
  End If

  Dim myarr() As Variant
  Dim i As Integer
  ReDim myarr(1 To MyCollection.Count) As Variant

  For i = 1 To MyCollection.Count
      myarr(i) = MyCollection(i)
  Next i

  toArray1D = myarr
End Function

Verwendung

Dim col As New Collection
Set col = toCollection(RangeName(0))
Dim arr() As Variant
arr = toArray1D(col)
Set col = Nothing

Die Antwort ist in der akzeptierten Antwort in (ohne das ReDim-Problem): https://stackoverflow.com/questions/12663879/adding-values-to-variable-array-vba

In resume:

Dim aArray() As Single ' or whatever data type you wish to use
ReDim aArray(1 To 1) As Single
If strFirstName = "henry" Then
    aArray(UBound(aArray)) = 123.45
    ReDim Preserve aArray(1 To UBound(aArray) + 1) As Single
End If