Source Code for http://authors.aspalliance.com/brettb/FileAndFolderCheckers.asp


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<h1 align="left">ASP Scripts to Determine if a Specified File and Folder Exist</h1>

<h2 align="left">Introduction</h2>

<p align="left">Here are two VBScript functions that check to see if a specified file or
folder exist on the server. As such they can be used to improve error handling on ASP
pages that read or write files from disk.</p>

<h2 align="left">Checking to see if a file exists </h2>

<p align="left">The first function (<b>CheckFileExists</b>) checks to see if a file
exists. It returns 'True' if the file exists, or 'False' if it does not. </p>

<p align="left"><font color="#808080"><%<br>
Function CheckFileExists(sFileName)<br>
<br>
Dim FileSystemObject<br>
<br>
Set FileSystemObject = Server.CreateObject("Scripting.FileSystemObject")<br>
<br>
If (FileSystemObject.FileExists(sFileName)) Then<br>
CheckFileExists = True<br>
Else<br>
CheckFileExists = False<br>
End If<br>
<br>
Set FileSystemObject = Nothing<br>
<br>
End Function<br>
%></font> </p>

<p align="left">The following code is an example of how to use the function: </p>

<p align="left"><font color="#808080"><%<br>
If CheckFileExists("D:\ProductionReports\July2002\July-12-2002.xls") Then<br>
Response.Write("The production report for July 2002 is available")<br>
Else<br>
Response.Write("The production report for July 2002 cannot be found")<br>
End If<br>
%> </font></p>

<h2 align="left">Checking to see if a folder exists </h2>

<p align="left">The second function (<b>CheckFolderExists</b>) checks to see if a folder
exists. It returns 'True' if the folder exists, or 'False' if it does not. </p>

<p align="left"><font color="#808080"><%<br>
Function CheckFolderExists(sFolderName)<br>
<br>
Dim FileSystemObject<br>
<br>
Set FileSystemObject = Server.CreateObject("Scripting.FileSystemObject")<br>
<br>
If (FileSystemObject.FolderExists(sFolderName)) Then<br>
CheckFolderExists = True<br>
Else<br>
CheckFolderExists = False<br>
End If<br>
<br>
Set FileSystemObject = Nothing<br>
<br>
End Function<br>
%> </font></p>

<p align="left">The following code is an example of how to use the CheckFolderExists
function: </p>

<p align="left"><font color="#808080"><%<br>
If CheckFolderExists("D:\ProductionReports\July2002") Then<br>
Response.Write("The production reports for July 2002 are available")<br>
Else<br>
Response.Write("The production reports for July 2002 are not available")<br>
End If<br>
%> </font></p>

<h2 align="left">Problems with file permissions </h2>

<p align="left">A problem with these two functions is the fact that they will check for
the existence of files and folders, but do not indicate whether the user has the
appropriate permissions to view them. </p>

<p align="left">A way around this problem is to use the Permission Checker Component. This
Component is supplied with the Internet Information Server 4.0 Resource Kit, and also with
the Internet Information Services 5.0 of Windows 2000. This object has one method -
HasAccess, which makes it possible to determine if the user has permission to read a
specified file. </p>

<p align="left">An example of using the component is below: </p>

<p align="left"><font color="#808080"><%<br>
Set PermissionChecker = Server.CreateObject("MSWC.PermissionChecker")<br>
<br>
If PermissionChecker.HasAccess("D:\ProductionReports\July2002\July-19-2002.xls")
Then<br>
Response.Write("You have permission to view the July 2001 production report")<br>
Else<br>
Response.Write("You do not have permission to view the July 2002 production
report")<br>
End If<br>
<br>
Set PermissionChecker = nothing<br>
%> </font></p>

<p align="left">The Permission Checker Component can also be incorporated into the
original CheckFileExists function: </p>

<p align="left"><font color="#808080"><%<br>
Function CheckFileExists(sFileName)<br>
<br>
Dim FileSystemObject<br>
<br>
Set FileSystemObject = Server.CreateObject("Scripting.FileSystemObject")<br>
<br>
If (FileSystemObject.FileExists(sFileName)) Then<br>
Set PermissionChecker = Server.CreateObject("MSWC.PermissionChecker")<br>
<br>
If PermissionChecker.HasAccess(sFileName) Then<br>
CheckFileExists = True <br>
End If<br>
<br>
Set PermissionChecker = nothing<br>
Else<br>
CheckFileExists = False<br>
End If<br>
<br>
Set FileSystemObject = Nothing<br>
<br>
End Function<br>
%> </font></p>

<p align="left">The function can then be used in a similar way to before: </p>

<p align="left"><font color="#808080"><%<br>
If CheckFileExists("D:\ProductionReports\July2002\July-12-2002.xls") Then<br>
Response.Write("The production report for July 2002 is available")<br>
Else<br>
Response.Write("The production report for July 2002 cannot be found or you do not
have permission to view it")<br>
End If<br>
%> </font></p>

<h2 align="left">Further reading </h2>

<ul>
<li><p align="left"><a href="http://msdn.microsoft.com/library/psdk/iisref/comp3hf8.htm"
title="Further
information about the Permission Checker Component">Further
information</a> about the Permission Checker Component is available from Microsoft.</p>
</li>
<li><p align="left"><a HREF="http://www.amazon.com/exec/obidos/ASIN/0672317907/brettbcom"
title="Sams Teach Yourself Web
Development With ASP in 24 Hours">Sams Teach Yourself Web
Development With ASP in 24 Hours</a>. Start learning ASP with this introductory guide.</p>
</li>
</ul>








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<h2>Useful Development Tools</h2>
<div align="left">

<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td width="100%" valign="top"><a
href="http://www.winnershtriangle.com/w/Products.ASPDocumentationTool.asp" target="_blank" title="ASP Documentation Tool™"><strong>ASP
Documentation Tool™</strong></a></td>
</tr>
<tr>
<td width="100%" valign="top">Automatically creates developer documentation for ASP 2.0
and 3.0 web applications written in VBScript and JScript. Documentation for Microsoft
Access, SQL Server 7/2000 databases and Visual Basic 6.0 components associated with the
web application can also be incorporated into the reports. Documentation is created in
HTML, HTML Help and plain text formats.</td>
</tr>
<tr>
<td width="100%" valign="top">
   <a
href="http://www.winnershtriangle.com/w/SampleWeb_Documentation/SampleWeb.chm"><img
src="images/Icon_CHM.gif" width="16" height="16" alt="View Sample Output (HTML Help format)"
border="0" align="absmiddle"></a> <a
href="http://www.winnershtriangle.com/w/SampleWeb_Documentation/SampleWeb.chm" title="View Sample Output (HTML Help format)">View Sample
Output</a> (HTML Help format).<br>
   <a
href="http://www.winnershtriangle.com/w/SampleWeb_Documentation/Default.htm"><img
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align="absmiddle" border="0"></a> <a
href="http://www.winnershtriangle.com/w/SampleWeb_Documentation/Default.htm"
target="_blank" title="View Sample Output (HTML Format)">View Sample Output</a> (HTML Format).<br>
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href="http://www.brettb.com/redirector.asp?URL=downloads/ASPDocumentationTool_Evaluation_Version.zip"><img
src="images/Icon_Download.gif" width="18" height="20" alt="Download Trial Version"
border="0" align="absmiddle"></a> <a
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Trial Version</a> (5.2Mb ZIP file).</td>
</tr>
</table>
<br>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td width="100%" valign="top"><a
href="http://www.winnershtriangle.com/w/Products.IndexServerCompanion.asp" target="_blank" title="Index Server Companion"><strong>Index Server Companion</strong></a></td>
</tr>
<tr>
<td width="100%" valign="top">
The Index Server Companion is a Windows application that extends the functionality of Microsoft Index Server so that it is able to index content from remote websites and also from ODBC databases. As such it can be used as a low cost alternative to Site Server 3.0 Search.

</td>
</tr>
<tr>
<td width="100%" valign="top">
   <a
href="http://www.brettb.com/redirector.asp?URL=downloads/IndexServerCompanionDocumentation.zip"><img
src="images/Icon_CHM.gif" width="16" height="16" alt="View Product Documentation"
border="0" align="absmiddle"></a> <a
href="http://www.brettb.com/redirector.asp?URL=downloads/IndexServerCompanionDocumentation.zip" title="View Product Documentation">View Product
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   <a
href="http://www.winnershtriangle.com/w/Products.IndexServerCompanion.SampleSearch.asp"><img
src="images/Icon_HTML.gif" width="16" height="16" alt="Try Sample Search Facility"
align="absmiddle" border="0"></a> <a
href="http://www.winnershtriangle.com/w/Products.IndexServerCompanion.SampleSearch.asp"
target="_blank" title="View Sample Search Facility">Try Sample Search Facility</a>.<br>
   <a
href="http://www.brettb.com/redirector.asp?URL=downloads/IndexServerCompanion_EvaluationVersion.zip"><img
src="images/Icon_Download.gif" width="18" height="20" alt="Download Trial Version"
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Trial Version</a> (1.7Mb ZIP file).</td>
</tr>
</table>
<br>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td width="100%" valign="top"><a
href="http://www.winnershtriangle.com/w/Products.ASPNETDocumentationTool.asp" target="_blank" title="ASP.NET Documentation Tool"><strong>ASP.NET Documentation Tool</strong></a></td>
</tr>
<tr>
<td width="100%" valign="top">Automatically creates developer documentation for ASP.NET web applications written in C# or VB.NET.
Documentation for SQL Server 7/2000 databases and C#/VB.NET components associated with the
web application can also be incorporated into the reports. Documentation is created in
HTML, HTML Help and plain text formats.</td>
</tr>
<tr>
<td width="100%" valign="top">
   <a href="http://www.winnershtriangle.com/w/ASP.NETDocToolSamples/SampleWeb.NET/SampleWeb.NET.chm"><img
src="images/Icon_CHM.gif" width="16" height="16" alt="View Sample Output (HTML Help format)"
border="0" align="absmiddle"></a> <a
href="http://www.winnershtriangle.com/w/ASP.NETDocToolSamples/SampleWeb.NET/SampleWeb.NET.chm" title="View Sample Output (HTML Help format)">View Sample
Output</a> (HTML Help format).<br>
   <a
href="http://www.winnershtriangle.com/w/ASP.NETDocToolSamples/SampleWeb.NET/Default.htm"><img
src="images/Icon_HTML.gif" width="16" height="16" alt="View Sample Output (HTML Format)"
align="absmiddle" border="0"></a> <a
href="http://www.winnershtriangle.com/w/ASP.NETDocToolSamples/SampleWeb.NET/Default.htm"
target="_blank" title="View Sample Output (HTML Format)">View Sample Output</a> (HTML Format).<br>
   <a
href="http://www.brettb.com/redirector.asp?URL=downloads/ASP.NETDocumentationTool_1.0.zip"><img
src="images/Icon_Download.gif" width="18" height="20" alt="Download Trial Version"
border="0" align="absmiddle"></a> <a
href="http://www.brettb.com/redirector.asp?URL=downloads/ASP.NETDocumentationTool_1.0.zip" title="Download Trial Version">Download
Trial Version</a> (727K ZIP file).</td>
</tr>
</table>
<br>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td width="100%" valign="top"><a
href="http://www.winnershtriangle.com/w/Products.SQLDocumentationTool.asp" target="_blank" title="SQL Documentation Tool"><strong>SQL
Documentation Tool</strong></a></td>
</tr>
<tr>
<td width="100%" valign="top">The SQL Documentation Tool creates technical documentation for Microsoft SQL Server 7.0 and 2000 databases. Technical documentation is created in HTML and HTML Help formats. The HTML Help format documentation is fully searchable and cross referenced. The SQL Documentation Tool documents SQL Server Tables, Views, Stored Procedures, Triggers and Table Relationships.</td>
</tr>
<tr>
<td width="100%" valign="top">
   <a
href="http://www.winnershtriangle.com/w/SQLDocumentationTool/Reports/Test_Project/Test_Project.chm"><img
src="images/Icon_CHM.gif" width="16" height="16" alt="View Sample Output (HTML Help format)"
border="0" align="absmiddle"></a> <a
href="http://www.winnershtriangle.com/w/SQLDocumentationTool/Reports/Test_Project/Test_Project.chm" title="View Sample Output (HTML Help format)">View Sample
Output</a> (HTML Help format).<br>
   <a
href="http://www.winnershtriangle.com/w/SQLDocumentationTool/Reports/Test_Project/Default.htm"><img
src="images/Icon_HTML.gif" width="16" height="16" alt="View Sample Output (HTML Format)"
align="absmiddle" border="0"></a> <a
href="http://www.winnershtriangle.com/w/SQLDocumentationTool/Reports/Test_Project/Default.htm"
target="_blank" title="View Sample Output (HTML Format)">View Sample Output</a> (HTML Format).<br>
   <a
href="http://www.brettb.com/redirector.asp?URL=downloads/SQLDocumentationToolTrial.zip"><img
src="images/Icon_Download.gif" width="18" height="20" alt="Download Trial Version"
border="0" align="absmiddle"></a> <a
href="http://www.brettb.com/redirector.asp?URL=downloads/SQLDocumentationToolTrial.zip" title="Download Trial Version">Download
Trial Version</a> (10.3Mb ZIP file).</td>
</tr>
</table>
<br>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td width="100%" valign="top"><a
href="http://www.winnershtriangle.com/w/Products.TheWebsiteUtility.asp" target="_blank" title="The Website Utility"><strong>The Website Utility</strong></a></td>
</tr>
<tr>
<td width="100%" valign="top">The Website Utility examines websites for errors and
areas that need to be optimised for search engines by using a built in web crawling engine.
Errors checked for include broken or moved hyperlinks, missing page titles and missing meta tags.
It also generates HTML for use in creating website site maps (table of contents pages - like <a href="TableOfContents.asp" title="Example Table of Contents">this one</a>), and is
able to create both client-side <a href="http://www.winnershtriangle.com/w/Products.TheWebsiteUtility.JavaScriptSearchEngine.asp" title="JavaScript Search Engine">JavaScript Search Engines</a> and server-side <a href="http://www.winnershtriangle.com/w/Products.TheWebsiteUtility.ASPSearchEngine.asp" title="JavaScript Search Engine">ASP Search Engines</a> for a website.</td>
</tr>
<tr>
<td width="100%" valign="top">
   <a
href="http://www.winnershtriangle.com/w/TheWebsiteUtility/Reports/ASPAlliance/default.htm"><img
src="images/Icon_HTML.gif" width="16" height="16" alt="View Sample Output (HTML Format)"
align="absmiddle" border="0"></a> <a
href="http://www.winnershtriangle.com/w/TheWebsiteUtility/Reports/ASPAlliance/default.htm"
target="_blank" title="View Sample Output (HTML Format)">View Sample Output</a> (HTML Format).<br>
   <a
href="http://www.brettb.com/redirector.asp?URL=downloads/TheWebsiteUtilityTrial.zip"><img
src="images/Icon_Download.gif" width="18" height="20" alt="Download Trial Version"
border="0" align="absmiddle"></a> <a
href="http://www.brettb.com/redirector.asp?URL=downloads/TheWebsiteUtilityTrial.zip" title="Download Trial Version">Download
Trial Version</a> (3Mb ZIP file).</td>
</tr>
</table>
<br>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td width="100%" valign="top"><a
href="http://www.regnow.com/softsell/nph-softsell.cgi?item=8452-18&affiliate=44172" target="_blank" title="Text Workbench"><strong>Text Workbench</strong></a></td>
</tr>
<tr>
<td width="100%" valign="top">Text Workbench is a file search and replacement utility for text files and Microsoft Office documents. Make rapid file replacements on multiple files and folders full of files. Advanced replacement options include regular expressions support. It even works on remote file systems via FTP. A Regular Expression Laboratory allows advanced pattern matching and replacement expressions to be built and tested. This great utility will make your everyday development tasks much easier!
</td>
</tr>
<tr>
<td width="100%" valign="top">
   <a
href="http://www.regnow.com/trialware/download/Download_TxtWrBSetup.exe?item=8452-18&affiliate=44172"><img
src="images/Icon_Download.gif" width="18" height="20" alt="Download Trial Version of Text Workbench"
border="0" align="absmiddle"></a> <a
href="http://www.regnow.com/trialware/download/Download_TxtWrBSetup.exe?item=8452-18&affiliate=44172" title="Download Trial Version of Text Workbench">Download
Trial Version</a> (3Mb ZIP file; you have the option to either install directly from this link or save the file for later installation).</td>
</tr>
</table>

</div>

<h2>Author details</h2>
<p><p><a href="http://www.brettb.com/" title="View Brett's personal website">Brett Burridge</a>
spent two years working in the <a href="http://www.essex.ac.uk/"
title="University of Essex">University of Essex</a> Computing Service, before moving to <a
href="http://www.intapps.com/" title="The Internet Applications Group">The Internet
Applications Group</a> in the Autumn of 1999, where he developed e-Business applications for a range of
corporate clients and dot-com start ups.</P>
<P>Brett is presently employed as an Internet developer and technical writer
through his own company,
<a href="http://www.winnershtriangle.com/w/Default.asp" title="Winnersh Triangle Web Solutions Limited" target="_blank">Winnersh Triangle Web Solutions Limited</a>.
The company produces a number of
innovative products, including the popular
<a href="http://www.winnershtriangle.com/w/Products.ASPDocumentationTool.asp" target="_blank" title="ASP Documentation Tool™ - creates project documentation for ASP 2.0 and 3.0 websites written in VBScript and JScript, and also SQL Server 2000 databases">ASP Documentation Tool™</a>, the <a href="http://www.winnershtriangle.com/w/Products.IndexServerCompanion.asp" target="_blank" title="Index Server Companion - extends the functionality of Index Server to allow indexing of content from remote websites and ODBC databases">Index Server Companion</a>, the <a href="http://www.winnershtriangle.com/w/Products.ASPNETDocumentationTool.asp" target="_blank" title="ASP.NET Documentation Tool - creates documentation for ASP.NET web applications written in VB.NET and C#">ASP.NET Documentation Tool</a>, the <a href="http://www.winnershtriangle.com/w/Products.SQLServerDocumentationTool.asp" target="_blank" title="SQL Server Documentation Tool - Documents Microsoft SQL Server Databases">SQL Server Documentation Tool</a> and <a href="http://www.winnershtriangle.com/w/Products.TheWebsiteUtility.asp" target="_blank" title="The Website Utility">The Website Utility</a>.
The company is also available for <a href="http://www.winnershtriangle.com/w/Services.Main.asp" target="_blank" title="web application design and development">web application design and development</a> at reasonable rates, primarily using
<a href="http://www.winnershtriangle.com/w/Services.Microsoft.asp" target="_blank" title="Development using Microsoft technologies such as ASP, ASP.NET, Visual Basic, SQL Server">Microsoft technologies</a> (ASP, ASP.NET, Visual Basic, SQL Server) but also using <a href="http://www.winnershtriangle.com/w/Services.OpenSource.asp" target="_blank" title="Open source development using technologies such as PHP, MySQL and Perl">open source</a>
technologies such as PHP, MySQL and Perl. Specialist services include development
of <a href="http://www.winnershtriangle.com/w/Services.IndexServer.asp" target="_blank" title="Development of search solutions using Microsoft's Index Server and Site Server 3.0 Search">search solutions</a> using Microsoft's Index Server and Site Server 3.0 Search.
</P>
<P>
As well as the ASPAlliance, Brett has written articles for <a href="http://www.ariadne.ac.uk/issue33/nt-explorer/" title="Read Brett's most recent article for Ariadne.ac.uk" target="_blank">Ariadne.ac.uk</a>
and <a href="http://www.asptoday.com/content.asp?id=1435" target="_blank" title="Read Brett's first ASPToday article">ASPToday</a>, and has contributed recipes to the <a href="http://www.amazon.com/exec/obidos/ASIN/0672325241/brettbcom" target="_blank" title="ASP.NET Developer's Cookbook">ASP.NET Developer's Cookbook</a>.
   <small><a href="Links.asp" style="color: rgb(252,253,253);">links</a></small>
</P>
<p>
Outside web development, Brett is interested in digital photography (here's my <a href="http://www.brettb.com/gallery.asp" target="_blank" title="My digital photo gallery">photo gallery</a>), <a href="http://www.brettb.com/MyTropicalFishtank.asp" target="_blank" title="My Tropical Fish!">tropical fishkeeping</a>
and collecting contemporary works of art by artists such as <a href="http://www.brettb.com/Doug_Hyde_Gallery.asp" title="My Doug Hyde Limited Edition Sculptures and Prints" target="_blank">Doug Hyde</a>.
</p>

<p>Contact Brett by emailing <script language="JavaScript"><!--

document.write('<a title="Email Brett" href="mailto:' + 'brett' + '@asp' + 'alliance.com">brett' + '@' + 'aspalliance.com</a>');
// --></script></p>


<p align="center">
<a href="http://www.winnershtriangle.com/w/Default.asp?FROM=http://authors.aspalliance.com/brettb/FileAndFolderCheckers.asp" target="_blank"><IMG SRC="images/WinnershTriangleWebSolutions_BannerAd2.png" width="468" height="60" alt="Winnersh Triangle Web Solutions - Quality web development at affordable prices" border="0"></a>

</p>

</p>
<h2>Article history</h2>
<p>"ASP scripts to determine if a specified file and folder exist" originally
published on ASPWatch.com on October 11 2000. Republished on ASPAlliance.com on 26
September 2001.</p>
<p align="left"><a href="Default.asp" title="Back to the ASP Kitchen">ASP Kitchen</a>: <a
href="ASPWatchArticles.asp" title="Back to the ASPWatch.com articles">ASPWatch.com
articles</a>: File and Folder Checkers</p>


</td>

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<a href="http://www.google.com/">
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<input type="text" name="q" size="15" maxlength="255" value=""></input>
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<a href="http://www.regnow.com/softsell/visitor.cgi?affiliate=44172&action=site&vendor=7522" target="_blank" title="Search Engine Builder - Build a search engine for your website!"><img border="0" src="images/SearchEngineBuilder.gif" alt="Search Engine Builder - Build a search engine for your website!"></a>
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<tr><td bgcolor="#CC0000" colspan="2" style="BORDER-TOP: rgb(102,102,102) 1px solid;"><small><font color="white">© page content copyright Brett Burridge 1998 - 2004.</font></small></td></tr>
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