Need To Compress Files On Client Side... Is It Possible To Use Vbs For that?

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jbeteta

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Need To Compress Files On Client Side... Is It Possible To Use Vbs For that? Friday, December 04, 2009 12:23 PM (permalink)

0

Hello,

How asp.net can deal with client-side files is a question that has intrigued me for a long time ago.

We need to transfer client-side files via asp.net to a web server.

The first thing to do is to compress those files and then transfer them.
To compress the files, the asp.net application has to zip them on a folder of the client PC. How to do that? I'm aware that due security restrictions, asp.net application has to use Activex dll or some plugs to manipulate files on client side and end-users have to download and let be installed.

I found some vbscript that zip files on a PC folder, using 7-zip software. I post it .

How could I use this vbs in my asp.net code in order to compress the clienst-side files?

If I click on my button and call Zip function, then it got these errors:
- Microsoft VBScript runtime error: Object required: 'WScript'
- Microsoft VBScript runtime error: Type mismatch: 'Ubound'
- Microsoft VBScript runtime error: Object required: 'oFSO'

Do I have to compile the vbscript code in some dll and then use it in my asp.net application? Any guide to solve this thing will be very appreciated. Thank you.

HTML and VBS code:
====================

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="Transfer._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">    <title></title> <LINK href="Styles.css" type="text/css" rel="stylesheet" />

<script language="vbscript" type="text/vbscript">

Function Zip (sFileReducir, sArchiveZip, sFolderZip, sFolderDBF)
Set oFSO = WScript.CreateObject("Scripting.FileSystemObject")
Set oShell = WScript.CreateObject("Wscript.Shell")
'--------Find Working Directory--------
aScriptFilename = Split(Wscript.ScriptFullName, "\")
sScriptFilename = aScriptFileName(Ubound(aScriptFilename))
sWorkingDirectory = Replace(Wscript.ScriptFullName, sScriptFilename, "")
'--------------------------------------
'-------Ensure we can find 7za.exe------
If oFSO.FileExists(sWorkingDirectory & "\" & "7zG.exe") Then
   s7zLocation = ""
ElseIf oFSO.FileExists("C:\Program Files\7-Zip\7zG.exe") Then
   s7zLocation = "C:\Program Files\7-Zip\"
ElseIf oFSO.FileExists("C:\Archivos de programa\7-Zip\7zG.exe") Then
   s7zLocation = "C:\Archivos de programa\7-Zip\"
Else Zip = "Error: Couldn't find 7zG.exe"
   Exit Function
End If

'--------------------------------------
oShell.Run """" & s7zLocation & "7zG.exe"" a -tzip -y """ & sFolderZip & sArchiveZip & """ " & sFolderDBF & sFileReducir, 0, True

If oFSO.FileExists(sArchiveZip) Then
   Zip = 1
Else
   Zip = "Error: Archive Creation Failed."
End If

Call ShowMessage("Everything OK!")

End Function

Function ShowMessage (sMessage, x)
   Wscript.echo "Here's a message: " & sMessage
End Function

</script>

</head>

<body>
<form id="form1" runat="server">
<div > Files Compression </div>
<div>
<input id="Button1" type="button" language="VBScript" onclick="vbscript:Zip 'Reducir.dbf','Reducido.zip','C:\x\','C:\x\'" value="compress Files to .zip on client" />
</div>

#1

centauricw

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Re:Need To Compress Files On Client Side... Is It Possible To Use Vbs For that? Friday, December 04, 2009 9:12 PM (permalink)

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First, ASP.NET does absolutely nothing on the client computer. All ASP.NET code runs strictly on the server. All the pretty widgets you see in the browser are not ASP.NET code, but JavaScript code created by ASP.NET. For ASP.NET to do anything, the client state has to be posted back to the server and processed there.

Second, VBScript can only be used on a client running Internet Explorer. This is the only browser (that I'm aware of) that runs VBScript. This is why all client-side scripts use JavaScript.

And last, there is no way to guaranty that a given client will have the correct utility to zip up files. Of course, if this is actually a web site only used internally or by clients and you control the browser they use and what utilities are installed, then yes, it would be possible to have the client code zip up a file. But you will need to modify the security setting in IE because it doesn't allow JavaScript to create files by default.

If you really need to zip up a file on the client, then you probably should look at using a Java applet which provides more power.

#2

jbeteta Total Posts : 2 Scores: 0 Reward points : 0 Joined: 12/4/2009 Status: offline	Re:Need To Compress Files On Client Side... Is It Possible To Use Vbs For that? Saturday, December 05, 2009 12:12 AM (permalink) 0 Hi, I think I should look at some new tools that yahoo has developed: http://browserplus.yahoo.com/demos/squeezr/# I think that's what I need.
	#3

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