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File Access Tutorial
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File Access Tutorial
http://www.aspalliance.com/stevesmith/articles/filetutorial.asp
The File Access Component of ASP allows you to manipulate files on your server using ASP code. The first thing you should understand is what objects are available, and what their properties are. They are Drive, File, FileSystem, and Folder. There is also a Drives collection, a Files collection, and a Folders collection. Finally, the Textstream object is useful for moving data to and from files. Current specs for these objects are available from Microsoft's web site; you can click here to see a pop-up window with a relatively complete listing of the objects and their properties and methods.
ASP > Tips and Tutorials > File Manipulation
Oct 10, 2006
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Other links at ASP > Tips and Tutorials > File Manipulation
ASP does not allow you to use IO system to modify on files and folders. But with the help of FileSystem object you can delete any file on your server. Do not forget to double check permissions for this operation.
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This article is number three in a series of articles I wrote about uploading and displaying binary data with ASP. The first article was about Uploading binary data to the database, second was on Displaying binary data from the database and the third one ( this one ) is going to be on 'Uploading files to the server hard disk using pure ASP'.
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Firstly, it demonstrates the use of the FileSystemObject, and secondly it shows how powerful regular expressions can be. I learnt all I know about regular expressions from Microsoft's online documentation and a lot of experimentation!
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As you probably know, Microsoft has one free DLL, namely CPSHOST.DLL, with which you can upload files. It requires a folder with write permissions since it is there where the file(s) will be posted (saved) when they arrive to the Web server (IIS). Another drawback is that you are focusing only on file uploading and not on other uploading possibilities. Remember, when you upload a file, you can also upload (post) any other inputs, such as the input file, input checkbox, input password, and input image, etc. And you can check their value just as if you were posting an ordinary form.
So when you upload a file you are really posting a form's content to the browser by using a different encoding type (enctype) in your form. That encoding is specified as enctype="multipart/form-data" as an attribute of your form.
The specification in RFC 1867 "Form-based File Upload in HTML" describes the mechanism by which a file may be uploaded from a Web browser to the server.
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The specification in RFC 1867 "Form-based File Upload in HTML" describes the mechanism by which a file may be uploaded from a Web browser to the server.
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