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How to merge a nodes from two different xml files using DOM library
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Author
Topic: How to merge a nodes from two different xml files using DOM library (Read 3335 times)
Wujek
New Member
Posts: 10
How to merge a nodes from two different xml files using DOM library
«
on:
February 23, 2018, 09:58:55 pm »
I have been looking for a way to merge two different xml files in one file, or move a node from one to another. It is possible using DOM ? If yes, please give me an example.
Regards
Zbig
Logged
Leledumbo
Hero Member
Posts: 8744
Programming + Glam Metal + Tae Kwon Do = Me
Re: How to merge a nodes from two different xml files using DOM library
«
Reply #1 on:
February 25, 2018, 08:01:42 am »
Code: Pascal
[Select]
[+]
[-]
{$mode objfpc}{$H+}
uses
Classes
,
SysUtils
,
DOM
,
XMLRead
,
XMLWrite
;
const
XMLHeader
=
'<?xml version="1.0"?>'
;
var
ss1
,
ss2
:
TStringStream
;
xml1
,
xml2
:
TXMLDocument
;
node
,
impNode
:
TDOMNode
;
begin
try
ss1
:
=
TStringStream
.
Create
(
XMLHeader
+
'<root><node attr="value">text</node></root>'
)
;
ss2
:
=
TStringStream
.
Create
(
XMLHeader
+
'<root></root>'
)
;
WriteLn
(
'BEFORE:'
)
;
WriteLn
(
'XML 1: '
+
ss1
.
DataString
)
;
WriteLn
(
'XML 2: '
+
ss2
.
DataString
)
;
ReadXMLFile
(
xml1
,
ss1
)
;
ReadXMLFile
(
xml2
,
ss2
)
;
node
:
=
xml1
.
DocumentElement
.
FirstChild
;
// xm1.root.node
impNode
:
=
xml2
.
ImportNode
(
node
,
true
)
;
// import a.k.a clone + assign new owner document
xml2
.
DocumentElement
.
AppendChild
(
impNode
)
;
// make it a new child of xml2.root
xml1
.
DocumentElement
.
RemoveChild
(
node
)
;
// remove from xml1.root
// stream position will be at the string end after ReadXMLFile above, so we need to
// reset it to the initial position, otherwise it will be appended instead of overwritten
ss1
.
Seek
(
0
,
soBeginning
)
;
ss2
.
Seek
(
0
,
soBeginning
)
;
WriteXMLFile
(
xml1
,
ss1
)
;
WriteXMLFile
(
xml2
,
ss2
)
;
WriteLn
(
)
;
WriteLn
(
'AFTER:'
)
;
WriteLn
(
'XML 1: '
+
ss1
.
DataString
)
;
WriteLn
(
'XML 2: '
+
ss2
.
DataString
)
;
finally
xml1
.
Free
;
xml2
.
Free
;
ss1
.
Free
;
ss2
.
Free
;
end
;
end
.
Merging is just a variation of this, I'll leave that as an exercise for you.
«
Last Edit: February 25, 2018, 08:03:14 am by Leledumbo
»
Logged
Follow this if you want me to answer:
http://wiki.lazarus.freepascal.org/Lazarus_Faq#What_is_the_correct_way_to_ask_questions_in_the_forum.3F
http://pascalgeek.blogspot.com
https://bitbucket.org/leledumbo
https://github.com/leledumbo
Code first, think later - Natural programmer B)
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How to merge a nodes from two different xml files using DOM library
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