Showing posts with label xml. Show all posts
Showing posts with label xml. Show all posts

Saturday, April 5, 2014

Parsing XML in Run BASIC

One of the important feature that a Web 2.0 language needs is an XML parser. Run BASIC now has one built in. The XMLPARSER statement parses an XML string and returns an XML accessor object with a bunch of handy built-in methods for making your way through an XML document.
Here is a simple example of what that sort of code looks like:

a$ = "<program name=""myprog"" author=""Carl Gundel""/>"
xmlparser #parser, a$
print #parser key$()
for x = 1 to #parser attribCount()
key$ = #parser attribKey$(x)
print key$; ", ";
print #parser attribValue$(x)
next x

This short program produces:

program
name, myprog
author, Carl Gundel

And here is a short program which will display the tag names and contents of an artibrarily nested XML document:

xmlparser #doc, s$
print #doc key$()
call displayElements #doc
end

sub displayElements #xmlDoc
count = #xmlDoc elementCount()
for x = 1 to count
#elem = #xmlDoc #element(x)
print "Key: "; #elem key$();
value$ = #elem value$()
if value$ <> "" then
print " Value: "; value$
end if
print
call displayElements #elem
next x
end sub


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