Plugins / file / JSFile

[Rene]

Hello everyone,

I`ve got a question.

A main function in my database is to open files and it works great with Servoy thanks to this forum.

But now I want to check if a file exits before copying it (if I just copy it, it will create an empty file suggesting the copy was suceeded on windows)

However there is a function in Plugins / file / JSFile called “exists” but it gives me an error using it.

filepath is the name of a field containing the pathname generated by a vbs script.

If (filepath.exists())

Error message while running method

“Exists is no a function”
I`ve tried numberous different ways including JScript

var fso
fso = new ActiveXObject(“Scripting.FileSystemObject”)
If (fso.FileExits(filepath))

Error message while running
something about ActiveXObject not declares as a variable.
Can anyone help me with the correct syntax in servoy.

Many thanks in advance, Rene

[jcompagner]

i don’t see any example script but this those work fine at my place:

var contents = plugins.file.getFolderContents(“c:/temp”);
for(var p=0;p<contents.length;p++)
{
application.output(contents[p] + " " + contents[p].exists());
}

[Rene]

Hello Johan,

Well what I was trying do gain is to add a symple feature to the way files are opened as described in this forum.
If the file has been deleted or moved or the pathitem has been changed Windows doesn`t generate a failure but creates an empty file with the filename as you requested.
So what I was trying to do is before the copyfile action check if the file is valid if not an errormessage appears.

This was my code. filepath is a column in my table containing pathnames

if ( !filepath )
{
	plugins.dialogs.showErrorDialog( 'Error',  'No Document attached',  'Continue')
	return
}

if ( utils.stringMiddle(application.getOSName(), 1, 7) == "Windows")
{
	if (plugins.file.jsfile.exists(filepath))
	{
		var VI_DocViewId = docviewid
		plugins.file.copyFile(filepath, plugins.file.getDesktopFolder()+ '/DocView Saved Files/' + filename)
		docviewid_docview.newRecord()
		docviewid_docview.userdataid = globals.VI_UserDataId
		docviewid_docview.docviewid = VI_DocViewId
	}
	else
	{
		plugins.dialogs.showErrorDialog( 'Error',  'The document was not found please check path "' + filepath + '".',  'Continue')
	}
}
else
{
	plugins.dialogs.showErrorDialog( 'Error',  'There was no association found on your system to open this file ' + utils.stringRight(filename, 3),  'Continue')
}

controller.relookup()

But the code “if (plugins.file.jsfile.exists(filepath))” returns an error “The undefined value has no properties.”

I believe it to be very simple but I don`t SEE it a code example providing the correct syntax will help.

btw I`ve tried to import your code into the solution and calculating the parentfolder but recieved the same error without the check it works just fine.

With kind regards Rene

[jcompagner]

Now i see what you are trying to do..

First of all

“if (plugins.file.jsfile.exists(filepath))”

is not legal code.. you can’t have moved that at onces yes?

the jsfile node.. is a return type node. You can use those methods under jsfile only for things that are returned as a JSFile (or array of JSfiles) by the plugin it self..

see my code:

var contents = plugins.file.getFolderContents(“c:/temp”);
for(var p=0;p<contents.length;p++)
{
application.output(contents[p] + " " + contents[p].exists());
}

the method getFolderContents will return a array of JSFile objects then you can use the methods under the JSFile node in the method editor tree.
This i do with contents[p].exists() (remember i have to do [p] because i didn’t return directly a JSFile but an array of JSFiles…

now what you are trying to do is calling those jsfile functions on nothing or on a string.. With a nothing i mean “plugins.file.jsfile” that plugins.file doesn’t have a jsfile property.. so you can’t say: “plugins.file.jsfile”

But i made a change, because what you want is that you have a String object somewhere and you want to test if that string as a file exisits…
now i made a new method convertStringToJSFile(string filename)
that will return a JSFile representation of the given string…

so you can do this in the next version of servoy:

“plugins.file.convertStringToJSFile(filepath).exists())”

Then it will work fine.

[Rene]

G R E A T

jcompagner:
the jsfile node.. is a return type node. You can use those methods under jsfile only for things that are returned as a JSFile (or array of JSfiles) by the plugin it self..

see my code:

var contents = plugins.file.getFolderContents(“c:/temp”);
for(var p=0;p<contents.length;p++)
{
application.output(contents[p] + " " + contents[p].exists());
}

the method getFolderContents will return a array of JSFile objects then you can use the methods under the JSFile node in the method editor tree.
This i do with contents[p].exists() (remember i have to do [p] because i didn’t return directly a JSFile but an array of JSFiles…

now what you are trying to do is calling those jsfile functions on nothing or on a string.. With a nothing i mean “plugins.file.jsfile” that plugins.file doesn’t have a jsfile property.. so you can’t say: “plugins.file.jsfile”

Now I understand the code example.

Thank you very much for explaining it to me.

And the function “plugins.file.convertStringToJSFile(filepath).exists())” is going to be very handy for a lot of us I think.

The next release, as I read all about, is going to be an enormous improvement on a great program.

Just can`t wait to get my hands on it ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
Thank you very much. Rene