Updating / Deleting nodes using javascript

[simonchristieis]

I have an xml file, I can access the file and display, what I want to do is change the data in the file.
eg


var xmlDoc = new ActiveXObject("msxml2.DOMDocument.4.0"

xmlDoc.async=false;xmlDoc.resolveExternals=false;
xmlDoc.validateOnParse=false;

xmlDoc.load("xml/test.xml"

tName = "Mr Wallis"

nodes=xmlDoc.selectNodes("/school/teachersname='" +tName+ "']/*&quot


but what I would like to do is change the name to "Mr Williams"

then I would like to delete the entire node set

Can anyone help or point me towards a tutorial ?

Thanks in advance

 

[palbano]

>> Can anyone help or point me towards a tutorial ?

Are you using the MSDN MSXML Reference? You can't do much without that:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk30/htm/xmmthsave.asp

The following code works on this XML:

<root>
   <tnode id=&quot;1&quot; action='delete'/>
   <tnode id=&quot;2&quot; action='update'/>
   <tnode id=&quot;3&quot;>Hell World</tnode>
   <tnode id=&quot;4&quot; />
</root>

Script code

var xmlDoc = new ActiveXObject("msxml2.DOMDocument.4.0");

xmlDoc.async=false;xmlDoc.resolveExternals=false;
xmlDoc.validateOnParse=false;

xmlDoc.load("C:\\Research\\test.xml");

nodes=xmlDoc.selectNodes("//tnode[@id=3]/text()");

var oNode = nodes.item(0);
oNode.nodeValue = "Goodbye World";
xmlDoc.save("C:\\Research\\testsave.xml");

-pete

 

[simonchristieis]

Thank you for your help.

I have tried the code in the page and get a permission denied error.

Do you have any ideas ?

Thanks in advance

Simon

 

[palbano]

>> Do you have any ideas ?

Sure. My idea is that has nothing to do with XML. Security settings are part of the OS and as a programmer you should know how to gain write access to files on hard drives. Since you have not provided any information about your environment that is all the ideas I am going to have.

-pete

 

[simonchristieis]

Thanks for your time again pete.

After checking all the file permissions, and trawling through the internet, all I have managed to find is that it seems to be an issue with browser security, I have changed the file extension to .hta and it works fine,
did you manage to make your code work in an .htm file ?

simon

 

[palbano]

>> did you manage to make your code work in an .htm file ?

Ummm… your original post made no mention of executing in a browser context of any sort. You need to post good questions with complete technical information to get good/on target answers. I developed my code as a .js file and executed it directly in the Windows Script Host and of course it worked fine.

Yes there are tight restrictions under which that code might be allowed to execute from within a browser. I don’t know them all. HTA files are one of them. For the most part local disk access from a browser context is not allowed for script code embedded in HTML.


-pete

 

[simonchristieis]

Im sorry I hadn't made myself clearer. Thanks for your halp anyway - I will go ahead and use an .hta file , after all this is only for a game I'm developing, so I can decide platform / browser etc.

Thanks for your help anyway

Simon