How to check if a file exists?

Hi guys.

I am running javascript in Acrobat .pdf file created in LiveCycle Designer.

I need to check in silence if an external file outside the open document (C:\something\something\something.pdf) exists or not.

I understand that I'm only able to do this as a function of confidence within a script to the folder level javascript. I am familiar with those. The problem is, I don't know what function I should use and will have a difficult time in the research on it.

Try to use: doc.exists?

Try to open the document with a function and catch the error if the file does not exist?

I'm not so sure that if I just spend my path as a string, say "/ C/Something/something/something.pdf" or if I should first deal with the file as an object like:

var myFile = new File("/C/Something/something/something.pdf") (which was not in Acrobat... don't try to run it as a function of confidence)

Please notify.

Thank you!

I finished this figure myself.

XFA/JavaScript in my paper, I call a custom function that I have written and pass a string (or a string variable containing) my file path for that I would like to check:

if(typeof(MJS_FileExists) == "function") {
    try {
        if(MJS_FileExists("/C/something/somethingelse/filetocheckfor.pdf") == true) {
            xfa.host.messageBox("file is there");
        } else {
            xfa.host.messageBox("file is NOT there");
        }
    }
    catch(e) {
        app.alert("Processing error: "+e)
    }
}

The function I call is a folder level javascript. You have to maybe do some Googleing on how and where to install them. In the my file .js file real javascript level where the function is housed I use:

var MJS_FileExists = app.trustedFunction(function(filename) {
    app.beginPriv();
    var existingDoc = false;
    try {
         var checkDoc = app.openDoc(filename);
         checkDoc.closeDoc();
     existingDoc = true;
    } catch(e) {
     existingDoc = false;
    }
    return existingDoc;
    app.endPriv();
});

It took me a lot of trial and error. It sucks there is not a lot of in on the internet on how to do it via Acrobat / Live Cycle. Hope this helps someone else.

Tags: Acrobat

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BANNER
----------------------------------------------------------------
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
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 13  /
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