Printers.count - runtime

Printers.count - runtime

• cgirolami

  Here is the exception error: I did a test on my development box at work. Had 1 printer installed works I removed the printer and the folling error occurs.

  See the end of this message for details on invoking
  just-in-time (JIT) debugging instead of this dialog box.

  ************** Exception Text **************
  System.Exception: Printer error.
  at Microsoft.VisualBasic.ErrObject.Raise(Int32 Number, Object Source, Object Description, Object HelpFile, Object HelpContext)
  at Microsoft.VisualBasic.PowerPacks.Printing.Compatibility.VB6.PrinterObject.GetDefaultPrinterName()
  at Microsoft.VisualBasic.PowerPacks.Printing.Compatibility.VB6.Printer..ctor()
  at PrintersCount.Form1.Button1_Click(Object sender, EventArgs e) in d:\Testing\PrintersCount\PrintersCount\Form1.vb:line 5
  at System.Windows.Forms.Control.OnClick(EventArgs e)
  at System.Windows.Forms.Button.OnClick(EventArgs e)
  at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
  at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
  at System.Windows.Forms.Control.WndProc(Message& m)
  at System.Windows.Forms.ButtonBase.WndProc(Message& m)
  at System.Windows.Forms.Button.WndProc(Message& m)
  at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
  at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
  at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

  
  ************** Loaded Assemblies **************
  mscorlib
  Assembly Version: 2.0.0.0
  Win32 Version: 2.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
  ----------------------------------------
  PrintersCount
  Assembly Version: 1.0.0.0
  Win32 Version: 1.0.0.0
  CodeBase: file:///D:/Testing/PrintersCount/PrintersCount/bin/Debug/PrintersCount.exe
  ----------------------------------------
  Microsoft.VisualBasic
  Assembly Version: 8.0.0.0
  Win32 Version: 8.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Microsoft.VisualBasic/8.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
  ----------------------------------------
  System
  Assembly Version: 2.0.0.0
  Win32 Version: 2.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
  ----------------------------------------
  System.Windows.Forms
  Assembly Version: 2.0.0.0
  Win32 Version: 2.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
  ----------------------------------------
  System.Drawing
  Assembly Version: 2.0.0.0
  Win32 Version: 2.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
  ----------------------------------------
  System.Configuration
  Assembly Version: 2.0.0.0
  Win32 Version: 2.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
  ----------------------------------------
  System.Xml
  Assembly Version: 2.0.0.0
  Win32 Version: 2.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
  ----------------------------------------
  System.Runtime.Remoting
  Assembly Version: 2.0.0.0
  Win32 Version: 2.0.50727.42 (RTM.050727-4200)
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Runtime.Remoting/2.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll
  ----------------------------------------
  Microsoft.VisualBasic.PowerPacks.Printing.Printer
  Assembly Version: 1.0.0.0
  Win32 Version: 1.0.61208.0
  CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Microsoft.VisualBasic.PowerPacks.Printing.Printer/1.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.PowerPacks.Printing.Printer.dll
  ----------------------------------------

  ************** JIT Debugging **************
  To enable just-in-time (JIT) debugging, the .config file for this
  application or computer (machine.config) must have the
  jitDebugging value set in the system.windows.forms section.
  The application must also be compiled with debugging
  enabled.

  For example:

  <configuration>
  <system.windows.forms jitDebugging="true" />
  </configuration>

  When JIT debugging is enabled, any unhandled exception
  will be sent to the JIT debugger registered on the computer
  rather than be handled by this dialog box.

  
  

  
  

• Codigo47

  Your code works fine for me. What is the specific error message that you are seeing
  
  

• LoveWinXP

  Here is the code:

  Imports Microsoft.VisualBasic.PowerPacks.Printing.Compatibility.VB6

  Public Class Form1

  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

  Dim printer As New Printer

  If Printers.Count > 0 Then

  MsgBox(Printers.Count)

  End If

  End Sub

  End Class

  
  

• nunodonato

  John -

  Jeff is correct; Windows 2000 isn't officially supported. It should work, however, if you make sure that there is a valid default printer before creating a new printer object:

  Old Code:

  Dim printer As New Printer

  If Printers.Count > 0 Then

  MsgBox(Printers.Count)

  End If

  New Code:

  If Printers.Count > 0 Then

  Dim printer As New Printer

  MsgBox(Printers.Count)

  End If

  Hope this helps,

  Steve

  
  
  

• frappy666

  Yes, you are right. This PowerPacks Printer library only works on machines of XP and above. Thanks.
  
  

• user32

  Hi John,

  I just tried this on a machine with no printers and Count is returning 0 as expected. Can you share the code that is triggering the runtime error

  Steve Hoag

  Visual Basic Power Packs

  
  
  

• aliassce

  I dont remmber what the error is I'll post it on monday morning. I ran the code at home without any problems. My test computer is running Windows 2000 sp4 and my computer at home is XP sp2 maybe its a problem win windows 2000.

  john

  
  

• M.Glenn

  where do I get the power pack

  how is it installed

  
  
• Printers.count - runtime