Declare an array with only one element using RegisterArrayDeclaration

While working on my code backend, I encountered a peculiar issue with the JavaScript array registration. At times, instead of registering the actual values, commas are being placed in the array.

Here are two scenarios showcasing different outcomes:

oData Table 1:

statustype | orderstatus | ordercount
   6       |  received   |     6671

oData Table 2:

statustype | orderstatus | ordercount
   8       |  unknown    |        1
   4       |  pending    |      567
   3       |  in process |      117
   1       |  entered    |        3


Dim sOrderStatus As String = String.Empty
Dim iOrderCount As New List(Of Integer)
With oData

    If .Rows.Count = 0 Or sError.Length > 0 Then
        Response.Write(GetErrorNotFound())

        ddlWarehouses.Visible = False
        lblWarehouse.Visible = False
    Else

        For Each oRow In .Rows

            sOrderStatus = sOrderStatus & "'" & oRow.Item("OrderStatus").ToString & "',"
            iOrderCount.Add(CInt(oRow.Item("ordercount")))

        Next

        'Convert to an array and then register as a JavaScript array
        Dim orderArray As Integer() = iOrderCount.ToArray

        For s = 0 To orderArray.Count - 1
            Page.ClientScript.RegisterArrayDeclaration("orderArray", CStr(orderArray(s)))
        Next

        'Remove extra comma and register as a JavaScript array
        If sOrderStatus <> String.Empty Then
            sOrderStatus = sOrderStatus.Remove(sOrderStatus.LastIndexOf(","), 1)
            Page.ClientScript.RegisterArrayDeclaration("generatedLabels", sOrderStatus)
        End If

    End If

End With

Javascript:

alert("length: " + orderArray.length);
alert(orderArray.toString());

Outcome 1:
length: 6671

https://i.sstatic.net/6QqoY.png

Outcome 2:
length: 4

https://i.sstatic.net/1H1JT.png

Edit: I've stumbled upon something intriguing. When declaring an integer array with multiple values, everything functions correctly but when only one value is declared, the issue arises. Could this be a bug??

Any assistance or pointers would be highly appreciated.

Answer №1

Upon delving into the realm of JavaScript, it became clear that the reason for this behavior is due to .NET initializing the array using

new Array(*whatever parameter is provided*);

When only a single number is passed as a parameter to the array constructor, it creates an array of that specific length rather than filling it with that particular element. This explains why I ended up with an array containing just the number I passed in.

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