XML library

[agraham]

The XML library provides an XMLReader object that can read XML data from a suitably formatted file and an XMLWriter object that can write XML data to a file. Actually these objects are thin wrappers that expose the .NET XmlReader and XmlWriter classes to Basic4ppc. This library requires .NET 2.0 or later.

There is a (sort of - I don't really understand XML) demo, help and source for merging in the archive. If anyone who understands XML needs more functionality then post here and I will try to add it. If you can reference the MSDN docs on XMLReader XmlReader Members (System.Xml) and XmlWriter Members (System.Xml) then that would be useful.

EDIT :- Rapid update to version 1.1 with ReadString added to XMLReader and WriteCData added to XMLWriter as suggested by DaveW and corwin42. Thanks to both.

EDIT:- Version 1.2 posted with some additional navigational methods exposed for XmlReader See post #13.

EDIT:- Version 2.0 posted with some additional overloads for XmlWriter.WriteStartElement exposed and new XmlDocument and XmlNode objects. The XmlDocumentDemo uses StringBuilder from my http://www.basic4ppc.com/forum/addit...html#post10957 See posts #24 and #25

EDIT:- Minor update to version 2.1. See post#27

EDIT:- Updated to version 2.2. See post #33.

EDIT:- Updated to version 2.3. See post #39.

EDIT:- Updated to version 2.4. See post #43.

EDIT:- Updated to version 2.5. See post #59.

EDIT:- Updated to version 2.6. See post #61.

[DaveW]

Hi Andrew,

Something odd happened overnight with the XMLReader! When I first started playing with it, for NodeType: Element, rdr.Value returned the text content of the element. I *know* it did, I have the code here and was loading text from XML files quite happily!

But this morning that no longer works. Did you change that in v0.2? Now the rdr.Value only returns the text when the NodeType is Text. The trouble with that is you don't know what element that text came from (rdr.name is empty).

I had a look at the MSDN docs and there is a method called ReadString which (I think) does return the text when the NodeType is Element. Would it be possible to add that to the DLL?

XmlReader.ReadString Method (System.Xml)

Regards,
David.

[agraham]

Originally Posted by DaveW

When I first started playing with it, for NodeType: Element, rdr.Value returned the text content of the element. ... Did you change that in v0.2?

No, I haven't changed anything. Actually there is little to change as the Basic4ppc XMLReader object just calls the same named methods of the .NET XmlReader class (I don't believe in making things complicated ). If you look in the help, and the MSDN docs, under Value it appears to be documented that it would return an empty string for "Element". According to that only nine of the node types will return a value and "Element" is not one of them.

Now the rdr.Value only returns the text when the NodeType is Text. The trouble with that is you don't know what element that text came from

As an XML document is a tree structure I assume you could track the current element using "Element" to stack the current element and "EndElement" to unstack it and revert to the previous element.


I'll add ReadString anyway, perhaps corwin42/Markus can comment!

[DaveW]

It is really very odd! I know you did not change anything - or take anything out - but I also know that last night it was working and today it did not Anyway I have made some simple changes so that now it does work. Thanks anyway!

David.

[corwin42]

It is not absolutely necessary to have the ReadString() method if you stack the elements as agraham explained but it will make things a bit easier. So it would be a good idea to implement it. The writer has the WriteString() method so perhaps the reader really should have ReadString().

Addidionally I will suggest to implement WriteCData() method to create CDATA Blocks. I don't really need it but it makes the writer more complete.

Greetings,
Markus

[agraham]

Originally Posted by corwin42

ReadString() method ... it will make things a bit easier. So it would be a good idea to implement it ... I will suggest to implement WriteCData()

Both now done, thanks guys.

[Elrick]

Hello, agraham. In my prog i need to send a XML string to server and then get a response (XML too). Can it be done with this lib? Not to save into file, just get the xml string to send it and then not to open a file, just parse the response string.

[agraham]

I'm afraid that this library only reads from, and writes to, files.

[Elrick]

Originally Posted by agraham

I'm afraid that this library only reads from, and writes to, files.

And there is no way to do this as simple and convenient as it can be done with this lib?

[agraham]

Originally Posted by Elrick

And there is no way to do this as simple and convenient as it can be done with this lib?

In a nutshell - No!