Question

VBScript problem on aspx page

Asked by: jay-are

Hello Experts:

I'm trying to execute a vbscript on my aspx page.  Whenever I load the page it performs all the code-behind routines just fine but gives me a script error:  Type mismatch: 'Print_Page'

Is there some code error here causing this?  Here's the page:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="printvoucher.aspx.vb" Inherits="printvoucher" %>
<script language="vbscript" type="text/VBSCRIPT" >
        Sub Print_Page()
            Dim strComputer as string
            Dim strOldDefault as string
            Dim objWMIService as object
            Dim colPrinters, objPrinter as object
            strComputer = "."
 
            Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
 
            Set colPrinters =  objWMIService.ExecQuery ("Select * from Win32_Printer Where Default = TRUE")
 
            For Each objPrinter in colPrinters
                strOldDefault = objPrinter.Name
                strOldDefault = Replace(strOldDefault, "\", "\\")
            Next
 
            Set colPrinters =  objWMIService.ExecQuery ("Select * from Win32_Printer Where Name = 'DYMO'")
 
            For Each objPrinter in colPrinters
                objPrinter.SetDefaultPrinter()
            Next
 
            Wscript.Sleep 2000
            
            WebBrowser1.ExecWB(6,1,null,null)
            
            Set colPrinters =  objWMIService.ExecQuery ("Select * from Win32_Printer Where Name = '" & strOldDefault & "'")
 
            For Each objPrinter in colPrinters
                objPrinter.SetDefaultPrinter()
            Next
        End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head >
    <title>Print Voucher</title>
</head>
<body onload="Print_Page()" style="padding-right: 0px; padding-left: 0px; padding-bottom: 0px; margin: 0px; overflow: hidden; clip: rect(0px 0px 0px 0px); padding-top: 0px; clear: none; table-layout: fixed; display: block; left: 0px; background-image: none; visibility: visible; width: 0px; cursor: crosshair; position: absolute; top: 0px; height: 0px" >
<object id="WebBrowser1" style="display:none" classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></object>
    <form id="form1" runat="server" >
        <img src="https://www.mysite.com/FuelTracker/client logos/gwpflogo.gif" style="Z-INDEX: 112; LEFT: 0px; TOP: 0px; margin: inherit; padding-top: 0px; position:absolute" width="298px" alt="" />
        <asp:label runat="server" id="Label2" style="Z-INDEX: 112; LEFT: 2px; POSITION: absolute; TOP: 44px" font-size="12px" Height="55px" Width="295px" BorderStyle="Solid" BorderWidth="1px" Font-Names="Arial" ></asp:label>
    </form>
</body>
</html>

                                  
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Asked On
2008-07-11 at 10:32:18ID23557960
Topics

Programming for ASP.NET

,

Microsoft Visual Basic.Net

Participating Experts
1
Points
500
Comments
11

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Answers

 

by: rodnexPosted on 2008-07-11 at 11:45:06ID: 21984894

jay-are,

By placing this code outside of a sub and having it execute inline, I was able to see that an error is thrown because of the paranthesis around the WebBrowser1 call, cannot use parans when calling a sub.

Try removing the parans as seen below, hope this solves your problem or allows you to debug it further.

WebBrowser1.ExecWB 6,1,null,null


rodnex

 

by: jay-arePosted on 2008-07-11 at 11:52:48ID: 21984957

Ok I did that and it still gives me the same error.  

 

by: jay-arePosted on 2008-07-11 at 12:22:08ID: 21985222

Do I need to add a reference or something to my project/page for WMI?  I got this code from someplace else and I'm trying to get it to work with my existing webform.

 

by: rodnexPosted on 2008-07-13 at 05:18:28ID: 21992248

jay-are,

In this case the Wscript is only being used to pause script execution, but this won't work in the browser. Maybe the code you got was from a .vbs file or other where this would have worked.

You will need to use some sort of workaround sleep technique for the browse/client side, the window.setTimeOut() method would work but requires the code be split in two, see example


    Sub DoSomething
        'main function doing some work that needs to pause
        idTimer = window.setTimeout("FinishAfterTwoSecondPause", 2000, "VBScript")
    End Sub

    Sub FinishAfterTwoSecondPause
        ' the code now continues along...
        window.clearTimeout(idTimer)
    End Sub
.

Here is a similar thread regarding the Sleep method and some solutions
http://www.experts-exchange.com/Web/Web_Languages/ASP/Q_21099829.html

 

by: jay-arePosted on 2008-07-13 at 09:19:32ID: 21993059

Even removing the Wscript doesn't get past the type mismatch error.  How do I know which line of this sub is causing the error?

 

by: rodnexPosted on 2008-07-13 at 18:47:40ID: 21995134

jay-are,

check ou tthe attached code, it runs without any errors in IE6, is this what you are trying to accomplish? I made a few changes and commented out the WScript.Sleep

<html>
<head>
<script language=vbscript type="text/vbscript">
 
        function go()
            Dim strComputer
            Dim strOldDefault
            Dim objWMIService
            Dim colPrinters
            Dim objPrinter
            strComputer = "."
 
            Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
 
            Set colPrinters =  objWMIService.ExecQuery ("Select * from Win32_Printer Where Default = TRUE")
 
            For Each objPrinter in colPrinters
                strOldDefault = objPrinter.Name
                strOldDefault = Replace(strOldDefault, "\", "\\")
            Next
 
            Set colPrinters =  objWMIService.ExecQuery ("Select * from Win32_Printer Where Name = 'DYMO'")
 
            For Each objPrinter in colPrinters
                objPrinter.SetDefaultPrinter()
            Next
 
            'Wscript.Sleep 2000
            
            document.WebBrowser1.ExecWB 6,1,null,null
            
            Set colPrinters =  objWMIService.ExecQuery ("Select * from Win32_Printer Where Name = '" & strOldDefault & "'")
 
            For Each objPrinter in colPrinters
                objPrinter.SetDefaultPrinter()
            Next
       end function     
 
</script>
</head>
<body onload="go()">
    <form id="form1">
        <object id="WebBrowser1" style="display:none" classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></object>        
    </form>
</body>
</html>

                                              
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by: jay-arePosted on 2008-07-13 at 19:22:00ID: 21995250

Yeah that seems to get past the type mismatch error.  Now I'm stuck on: ActiveX component cant create object: 'GetObject'"

I assume I don't have something setup properly on my machine?  I've tested it locally and remotely on my machine and I get the error both ways.  I followed these steps:
http://www.lewisroberts.com/2006/02/28/remote-scripting-activex-component-cant-create-object-on-wshcontroller-object/


Any ideas?

 

by: jay-arePosted on 2008-07-13 at 19:43:59ID: 21995322

Don't I need a line to create the object?

Set GetObject = Server.CreateObject("???")
??

 

by: jay-arePosted on 2008-07-14 at 14:15:30ID: 22002209

I got it working...mostly!  I added my website as a "trusted site" and then changed the security settings for trusted sits to enable "Initialize and Script ActiveX controls not marked as safe".  This changes the default printer to the DYMO printer (attached to my machine) and then prints the page without any user interaction.  Problem is that it won't change the deafualt back to my previous default printer...Any idea there?

 

by: jay-arePosted on 2008-07-14 at 14:43:19ID: 22002388

Got it all working!

idTimer = window.setTimeout("FinishAfterTwoSecondPause", 2000, "VBScript")
            FinishAfterTwoSecondPause()
           
   ------------------------------------------
           
       end function
       Sub FinishAfterTwoSecondPause
        ' the code now continues along...
        window.clearTimeout(idTimer)
        End Sub    

This allows the print to happen and then it sets the printer back to my original default.  I'm so glad I'm past this issue!  Thanks for all the help.

 

by: rodnexPosted on 2008-07-15 at 06:26:43ID: 22006715

glad to hear it is working for you jay

20120131-EE-VQP-002

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