Question

Continuing On

Asked by: richard_gar

I have the following code that reads an item in the listview then runs an external dll and waits for a response. The listview can contain many rows of which what I need to do is get the first row run the external dll get the response and if the response = 0 then carry on as if nothing has happened. But if the response is more than 0 then I need it to show a messagebox to the user but move on to the next row.

The problem I face is that the external dll prog is collecting files from another PC so infact I am reading the Listview Row to get the machine details then running the external dll wtihin there I am running through a listbox to collect each file then returning to my listview to get the next row.

If it fails to communciate with the PC I need it to ignore the rest of the files in the listbox and move onto the next item in the listview.

How can I do this?

For Each lvItem As ListViewItem In ListView1.Items
 
            lblSiteID.Text = lvItem.Text
            lblTillID.Text = lvItem.SubItems(1).Text
            lblTAMAster.Text = lvItem.SubItems(4).Text
            lblIPAddress.Text = lvItem.SubItems(2).Text
 
            Call SaveINI(lblTillID.Text, lblIPAddress.Text)
 
            Dim ByteArray As New System.Text.ASCIIEncoding
            VBICR_COMMInit(ByteArray.GetBytes(""), ByteArray.GetBytes("PCHOS COMMS"))
 
            For i As Integer = 0 To ListBox1.Items.Count - 1
                Dim strOutputFile As String = ConfigurationManager.AppSettings("ZRead") & "\" & ListBox1.Items(i).ToString & "-" & lblSiteID.Text & "-" & lblTillID.Text & ".icr"
                Dim strFileNumber As String = ListBox1.Items(i)
                Dim strResult As Int16 = VBICR_COMMSalesCollect(lblTillID.Text, strFileNumber, 0, 0, ByteArray.GetBytes(strOutputFile), 1)
                Logger.ZReadEvents(lblSiteID.Text, lblTillID.Text, strResult)
 
'Here is where I need to check strResult for the result and if 0 then carry on if not then move to the next row in the listview.
 
            Next i
 
            'Collect the journal from the till
            If lvItem.SubItems(7).Text = "0" Then
 
            Else
 
                Dim strJournal As String = ConfigurationManager.AppSettings("Journal") & "\" & DateTime.Today.ToString("ddMMyyyy") & "-" & lblSiteID.Text & "-" & lblTillID.Text & ".txt"
                VBICR_COMMReceiveFile(lblTillID.Text, 900, 0, 0, ByteArray.GetBytes(strJournal))
 
                'Reset the T&A File
                VBICR_COMMJob(lblTillID.Text, 3, 1052, 0, 0, ByteArray.GetBytes(""))
 
            End If
 
            'Import files to corresponding tables
            ICR_COMMClose()
            FrmZRead.ShowDialog()
 
        Next
 
        End

                                  
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Asked On
2009-09-15 at 06:02:13ID24732679
Topics

Miscellaneous Programming

,

Microsoft Visual Basic.Net

Participating Experts
2
Points
500
Comments
7

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Answers

 

by: burningmacePosted on 2009-09-15 at 06:41:17ID: 25334750

If strResult = "" Then Exit For

 

by: CodeCruiserPosted on 2009-09-15 at 06:44:40ID: 25334781

>If strResult = "" Then Exit For
I wonder why you need to compare an Int16 to a string!


>if the response = 0 then carry on as if nothing has happened.
I am assuming you mean carry on executing the loop
>But if the response is more than 0 then I need it to show a messagebox to the user but move on to the next row.
Assuming this means show a message and still carry on the loop


Add following code inside loop

If strResult > 0 Then
   Messagebox.Show("Message here")
End If

                                              
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by: richard_garPosted on 2009-09-15 at 06:47:27ID: 25334806

the bit of code I have highlighted below is the loop to loop through the files but on my first file I want to check the strResult and if it was more than 0 then break the Next i loop and carry on with the next row in the listview as this will move onto the next PC.

If that makes sense

For i As Integer = 0 To ListBox1.Items.Count - 1
                Dim strOutputFile As String = ConfigurationManager.AppSettings("ZRead") & "\" & ListBox1.Items(i).ToString & "-" & lblSiteID.Text & "-" & lblTillID.Text & ".icr"
                Dim strFileNumber As String = ListBox1.Items(i)
                Dim strResult As Int16 = VBICR_COMMSalesCollect(lblTillID.Text, strFileNumber, 0, 0, ByteArray.GetBytes(strOutputFile), 1)
                Logger.ZReadEvents(lblSiteID.Text, lblTillID.Text, strResult)
 
'Here is where I need to check strResult for the result and if 0 then carry on if not then move to the next row in the listview.
 
            Next i
                                              
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by: CodeCruiserPosted on 2009-09-15 at 06:54:06ID: 25334869

As i suggested above, use this check

If strResult > 0 Then
   'Messagebox.show
   'Exit For -if you need to exit the loop
   ...
End If

 

by: burningmacePosted on 2009-09-15 at 07:25:53ID: 25335223

Sorry, didn't spot that it was an int16, just figured it was a string due to the 'str' prefix.

If you don't want to execute certain code after the For loop you can again use a conditional statement.

For Each lvItem As ListViewItem In ListView1.Items
	lblSiteID.Text = lvItem.Text
	lblTillID.Text = lvItem.SubItems(1).Text
	lblTAMAster.Text = lvItem.SubItems(4).Text
	lblIPAddress.Text = lvItem.SubItems(2).Text
 
	Call SaveINI(lblTillID.Text, lblIPAddress.Text)
 
	Dim ByteArray As New System.Text.ASCIIEncoding
	VBICR_COMMInit(ByteArray.GetBytes(""), ByteArray.GetBytes("PCHOS COMMS"))
 
	Dim skip As Boolean = False
	For i As Integer = 0 To ListBox1.Items.Count - 1
		Dim strOutputFile As String = ConfigurationManager.AppSettings("ZRead") & "\" & ListBox1.Items(i).ToString & "-" & lblSiteID.Text & "-" & lblTillID.Text & ".icr"
		Dim strFileNumber As String = ListBox1.Items(i)
		Dim strResult As Int16 = VBICR_COMMSalesCollect(lblTillID.Text, strFileNumber, 0, 0, ByteArray.GetBytes(strOutputFile), 1)
		Logger.ZReadEvents(lblSiteID.Text, lblTillID.Text, strResult)
 
		If strResult > 0 Then
			skip = True
			Exit For
		End If
	Next
 
	If Not skip Then
		' Stuff you want to skip out of your ForEach loop when strResult was >0 should go here
 
		'Collect the journal from the till
		If lvItem.SubItems(7).Text <> "0" Then
			Dim strJournal As String = ConfigurationManager.AppSettings("Journal") & "\" & DateTime.Today.ToString("ddMMyyyy") & "-" & lblSiteID.Text & "-" & lblTillID.Text & ".txt"
			VBICR_COMMReceiveFile(lblTillID.Text, 900, 0, 0, ByteArray.GetBytes(strJournal))
			'Reset the T&A File
			VBICR_COMMJob(lblTillID.Text, 3, 1052, 0, 0, ByteArray.GetBytes(""))
		End If
	Else
		' Stuff you want to do ONLY if strResult was >0 should go here
	End If
 
	' Stuff you want to do regardless of strResult's value
	ICR_COMMClose()
	FrmZRead.ShowDialog()
Next

                                              
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by: richard_garPosted on 2009-09-15 at 10:23:33ID: 25337156

burningmace

I have followed your instruction but it is not working correctly. I have posted my code so you can review

        ListBox1.Items.Clear()
        ListBox2.Items.Clear()
 
        Call GetSites()
 
        ListBox1.Items.Add("1") 'PLU File
        ListBox2.Items.Add("tblZPLUSales")
        'ListBox1.Items.Add("2") 'PLU Group
        'ListBox2.Items.Add("tblZGroups")
        'ListBox1.Items.Add("6") 'Clerk Detail
        'ListBox2.Items.Add("tblZClerkSales")
        'ListBox1.Items.Add("50") 'Fixed Totals
        'ListBox2.Items.Add("tblZFixedSales")
        'ListBox1.Items.Add("51") 'Finalise Key
        'ListBox2.Items.Add("tblZFinalize")
        'ListBox1.Items.Add("52") 'Transaction Key
        'ListBox2.Items.Add("tblZTransaction")
        'ListBox1.Items.Add("55") 'Departments
        'ListBox2.Items.Add("tblZDepartments")
        ListBox1.Items.Add("105")
        ListBox2.Items.Add("tblEmployeeHours")
        ListBox1.Items.Add("261") 'Customer Points
        ListBox2.Items.Add("tblZCustPoints")
        ListBox1.Items.Add("263") 'Customer Spend To Date
        ListBox2.Items.Add("tblZCustSpend")
        ListBox1.Items.Add("265") 'Customer Credit
        ListBox2.Items.Add("tblZCustCredit")
        ListBox1.Items.Add("266") 'Customer Debit
        ListBox2.Items.Add("tblZCustDebit")
        ListBox1.Items.Add("267") 'Customer Balance
        ListBox2.Items.Add("tblZCustBalance")
        ListBox1.Items.Add("268") 'Customer Balance
        ListBox2.Items.Add("tblZCustDebt")
        ListBox1.Items.Add("269") 'Customer Balance
        ListBox2.Items.Add("tblZCustBanned")
 
        For Each lvItem As ListViewItem In ListView1.Items
 
            lblSiteID.Text = lvItem.Text
            lblTillID.Text = lvItem.SubItems(1).Text
            lblTAMAster.Text = lvItem.SubItems(4).Text
            lblIPAddress.Text = lvItem.SubItems(2).Text
 
            'Get T&A results
            If lvItem.SubItems(5).Text = "0" Then
                ListBox1.Items.Remove("105")
                ListBox2.Items.Remove("tblEmployeeHours")
            End If
 
            'Get customer points
            If lvItem.SubItems(6).Text = "0" Then
                ListBox1.Items.Remove("261") 'Customer Points
                ListBox2.Items.Remove("tblZCustPoints")
                ListBox1.Items.Remove("263") 'Customer Spend To Date
                ListBox2.Items.Remove("tblZCustSpend")
                ListBox1.Items.Remove("265") 'Customer Credit
                ListBox2.Items.Remove("tblZCustCredit")
                ListBox1.Items.Remove("266") 'Customer Debit
                ListBox2.Items.Remove("tblZCustDebit")
                ListBox1.Items.Remove("267") 'Customer Balance
                ListBox2.Items.Remove("tblZCustBalance")
                ListBox1.Items.Remove("268") 'Customer Balance
                ListBox2.Items.Remove("tblZCustDebt")
                ListBox1.Items.Remove("269") 'Customer Balance
                ListBox2.Items.Remove("tblZCustBanned")
            End If
 
            Call SaveINI(lblTillID.Text, lblIPAddress.Text)
 
            Dim ByteArray As New System.Text.ASCIIEncoding
            VBICR_COMMInit(ByteArray.GetBytes(""), ByteArray.GetBytes("PCHOS TILL COMMS"))
 
            'Lock the till
            VBICR_COMMJob(lblTillID.Text, 1, 0, 0, 0, ByteArray.GetBytes(""))
 
            'Collect the file but not Z resetting them yet
            Dim skip As Boolean = False
            For i As Integer = 0 To ListBox1.Items.Count - 1
                Dim strOutputFile As String = ConfigurationManager.AppSettings("ZRead") & "\" & ListBox1.Items(i).ToString & "-" & lblSiteID.Text & "-" & lblTillID.Text & ".icr"
                Dim strFileNumber As String = ListBox1.Items(i)
                Dim strResult As Int16 = VBICR_COMMSalesCollect(lblTillID.Text, strFileNumber, 0, 0, ByteArray.GetBytes(strOutputFile), 0)
                Logger.ZReadEvents(lblSiteID.Text, lblTillID.Text, " Collected Sales File: " & ListBox1.Items(i).ToString & " " & strResult)
 
                'Check Status if till was unreadable show error and carry on
                If strResult > 0 Then
                    FrmReadStatus.ListBox1.Items.Add("Site: " & lblSiteID.Text & " Till: " & lblTillID.Text & " Status: Failed")
                    skip = True
                    Exit For
                End If
 
            Next i
 
            'Now z reset the files
            If Not skip Then
                For i As Integer = 0 To ListBox1.Items.Count - 1
                    Dim strResult As Int16 = VBICR_COMMJob(lblTillID.Text, 3, ListBox1.Items(i).ToString, 0, 0, ByteArray.GetBytes(""))
                    Logger.ZReadEvents(lblSiteID.Text, lblTillID.Text, " Reset sales file: " & ListBox1.Items(i).ToString & " " & strResult)
                Next i
 
                'Collect the journal from the till
                If lvItem.SubItems(7).Text = "0" Then
 
                Else
 
                    Dim strJournal As String = ConfigurationManager.AppSettings("Journal") & "\" & DateTime.Today.ToString("ddMMyyyy") & "-" & lblSiteID.Text & "-" & lblTillID.Text & ".txt"
                    VBICR_COMMReceiveFile(lblTillID.Text, 900, 0, 0, ByteArray.GetBytes(strJournal))
 
                    'Reset the T&A File
                    VBICR_COMMJob(lblTillID.Text, 3, 1052, 0, 0, ByteArray.GetBytes(""))
 
                End If
 
            Else
 
                'Import files to corresponding tables
                VBICR_COMMJob(lblTillID.Text, 2, 0, 0, 0, ByteArray.GetBytes(""))
                ICR_COMMClose()
                FrmZRead.ShowDialog()
            End If
 
        Next
 
        FrmReadStatus.ShowDialog()
 
            End

                                              
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by: burningmacePosted on 2009-09-15 at 13:34:51ID: 25339139

Well the problem is I don't know how your code is supposed to operate, so I can't really help debug. Set a breakpoint at the start of the code and step through it in order to see where it's going wrong.

20120131-EE-VQP-002

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