SOAP Request error… why am I getting a NRE?

Question

I pretty much copy and pasted the code from the API PDF, but am getting a Null reference Exception on line:

AccountArray(0) = AccountToUpdate

Anyone know what I am doing wrong? Thanks!

Dim boolQueryFinished = False
Dim strCurrentID As String = "0"
Dim contractid As Integer
Dim strWebURI As String = "https://webservices.autotask.net/atservices/1.5/atws.asmx"
Dim myService As New ATWS
myService.Url = strWebURI
Dim cred As New System.Net.NetworkCredential("U", "P")
Dim credCache As New System.Net.CredentialCache
credCache.Add(New Uri(myService.Url), "Basic", cred)
myService.Credentials = credCache
Dim AccountID As New ArrayList
Dim i As Integer
While Not (boolQueryFinished)
Dim strQuery As String = "<queryxml><entity>Contract</entity>" & _
"<query><condition><field>id<expression op=""greaterthan"">" & strCurrentID &
"</expression></field></condition></query>" & _
"</queryxml>"
Dim r As ATWSResponse
r = myService.query(strQuery)
If r.EntityResults.Length > 0 Then
    For Each ent As Entity In r.EntityResults 
        strCurrentID = ent.id
        AccountID.Add(CType(ent, Contract).AccountID)

    Next
Else
    boolQueryFinished = True
    While i < ContractName.Count
        listOutput.Items.Add(ContractName(i))
        listOutput.Items.Add(id(i))
        If ContractName(i).Contains("Georges") Then
            listOutput.Items.Add("Found it")
            Dim sResponse As ATWSResponse
            Dim AccountToUpdate As New Contract
            Dim AccountArray(0) As Contract
            AccountToUpdate.AccountID = AccountID(i)


            AccountArray(0) = AccountToUpdate
            Dim entityArray() As Entity = CType(AccountArray, Entity())
            sResponse = myService.update(entityArray)

            If sResponse.ReturnCode = 1 Then
                listOutput.Items.Add("Updated")
            Else
                listOutput.Items.Add("Failed")

            End If
        End If

        i = i + 1
    End While
    listOutput.Items.Add(id.Count)
    listOutput.Items.Add(ContractName.Count)
End If
End While

Answer 1

It appears that:

• The r.EntityResults.Length is not greater than zero. You've fallen into the else clause.
• The While i < ContractName.Count loop was entered (it's not clear what this ContractName is, though.
• i isn't initialized yet, so it's value is 0 .
• From what we can see posted above, we should have seen an ArgumentOutOfRange Exception , as we're trying to get to index 0 of an empty ArrayList.

AccountToUpdate.AccountID = AccountID(i)

Are you sure you meant to have the While loop within the Else block? I'm curious where the End If statement is?