Specified cast is not valid

[cmdolcet69]

I get an error with my code whenever i want to sort an array for unique values.
_readingLabelArrayList.sort

Private Sub TrmMux_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles TrmMux.Tick
Me.TrmMux.Enabled = False
gmux.GetBitCount()

CType(_readingLabelArrayList(intarrayindex), Label).Text = gmux.MuxAnalogValues(1)
Me.TrmMux.Enabled = True
End Sub


I need to sort the the _readingLabelArrayList to see if there are unique values in that array. How can i do this?

[Plater]

Does it tell you what type it is and what type it's trying to cast to in the error message (it might be happening behind the scenes)

Is your arraylist actually full of Labels and not just their text?

[nateraaaa]

I get an error with my code whenever i want to sort an array for unique values.
_readingLabelArrayList.sort

Private Sub TrmMux_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles TrmMux.Tick
Me.TrmMux.Enabled = False
gmux.GetBitCount()

CType(_readingLabelArrayList(intarrayindex), Label).Text = gmux.MuxAnalogValues(1)
Me.TrmMux.Enabled = True
End Sub


I need to sort the the _readingLabelArrayList to see if there are unique values in that array. How can i do this?

The following Example has served me well many times when I need to sort or find duplicate values in an arraylist.

Nathan

[cmdolcet69]

Does it tell you what type it is and what type it's trying to cast to in the error message (it might be happening behind the scenes)

Is your arraylist actually full of Labels and not just their text?

Below is the code i use to create and add the arraylist
Private Sub CreateControls()
'controls to put on the screen
Dim lblCharacteristic As Label
Dim lblName As Label
Dim lblReading As Label

Dim intLoop As Integer
Dim intReadingSize As Integer
Try
_charLabelArrayList = New ArrayList
_readingLabelArrayList = New ArrayList
_ReadingArrayList3 = New ArrayList

For intLoop = 0 To _partfile.gageList.Count - 1
lblCharacteristic = New Label
lblName = New Label
lblReading = New Label

With lblReading
.Font = New System.Drawing.Font("Times New Roman", 8, FontStyle.Regular)
.BackColor = System.Drawing.Color.White
.ForeColor = System.Drawing.Color.Black
.AutoSize = True
.BorderStyle = BorderStyle.FixedSingle
.Text = "-00.00"
intReadingSize = .Width
.AutoSize = False
.Text = ""
.Width = intReadingSize
.TextAlign = HorizontalAlignment.Center
.TabIndex = intLoop
.BringToFront()
.CausesValidation = True
'AddHandler .Click, AddressOf ReadingLabel_Click
End With
_charLabelArrayList.Add(lblCharacteristic)
_readingLabelArrayList.Add(lblReading)
_ReadingArrayList3.Add(lblReading)

Next

Catch
MsgBox("Runtime CreateControls Error" & vbCrLf & vbCrLf & Err.Description, MsgBoxStyle.Critical, "CreateControls Error...")
End Try
End Sub

[Plater]

Hmm well what I would recomend trying is to do a .GetType().Name or a value from the arraylist and see what it *thinks* it is.

[cmdolcet69]

Hmm well what I would recomend trying is to do a .GetType().Name or a value from the arraylist and see what it *thinks* it is.

Plater would it even make sense, Im trying to populate an arraylist then i need to make sure that each location in the array list is unique if the location is not unique i would then run the program again and populate another arraylist, and then i would compare the arraylist2 to see if it has unique numbers...Would arraylist be the best way of going?


How would i implement the GetType in my arraylist?

[Plater]

Well I'm not sure why you have an arraylist of labels, who's text property should contain unique numbers?
Why not just make an arraylist of integers (or floats or whatever) and then once those are unique, create your labels from there?

[cmdolcet69]

[quote=Plater]Well I'm not sure why you have an arraylist of labels, who's text property should contain unique numbers?
Why not just make an arraylist of integers (or floats or whatever) and then once those are unique, create your labels from there?[/QUOTE

The only reason im converting these arraylist of lables to text properties is because i have linear stage that moves in increment. I populate my screen text box with the values of the linear stage that i return from the (gmux.MuxAnalogValues(1)). That type of arrangement works jsut fine, however now because we are being very critical about the data that is being returned i now have to make sure that my arraylist and every value in there is unique, therefore i must somehow compare the values in the arraylist.


Can you direct me in the best possibility?

I hope this is clear enough and i apprieciate all the help.