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how to merge two XML document?

Posted on 2004-08-09
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Last Modified: 2012-06-27
I would like to know how to merge two XML document.  I tried using the DataSet.Merge as propose in : http://support.microsoft.com/default.aspx?scid=kb;en-us;308066 but I keep getting the error

The table (NarrowerItems ) cannot be the child table to itself in nested relations.

FILE1.XML:
-------------------------------------------------------------------

<?xml version="1.0" encoding="utf-8" ?>
<ItemsHierarchy CatName="">
  <Item Id="1" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" PageExists="true" CatName="Business" ContainsPages="1" />
  <Item Id="93" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" PageExists="true" CatName="Community and living" ContainsPages="1" />
  </ItemsHierarchy>
-------------------------------------------------------------------




FILE2.XML
--------------------------------------------------------------------

  <?xml version="1.0" encoding="utf-8" ?>
<ItemsHierarchy CatName="">
 <Item Id="1" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" CatName="Business">
 <NarrowerItems CatName="">
  <Item Id="2" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" PageExists="true" CatName="Building sites" ContainsPages="1" />
  </NarrowerItems>
  </Item>
 <Item Id="3088" Preferred="true" Default="true" AddedInVersion="1.02" LastUpdatedInVersion="1.02" CatName="Council, government and democracy">
 <NarrowerItems CatName="">
  <Item Id="13" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" PageExists="true" CatName="Information management" ContainsPages="1" />
  </NarrowerItems>
  </Item>
  </ItemsHierarchy>
-------------------------------------------------------------------





My desired output is:
1) ELIMINATION OF DUPLICATE ITEMS
2) Add Missing elements contained in FILE2.XML to the Merged XML output.

 I would like the output to look like this once FILE1.XML and FILE2.XML have been merged:

Output.xml
----------------------------------------------------------------------
  <?xml version="1.0" encoding="utf-8" ?>
<ItemsHierarchy CatName="">
 <Item Id="1" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" CatName="Business">
 <NarrowerItems CatName="">
  <Item Id="2" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" PageExists="true" CatName="Building sites" ContainsPages="1" />
  </NarrowerItems>
  </Item>
 <Item Id="3088" Preferred="true" Default="true" AddedInVersion="1.02" LastUpdatedInVersion="1.02" CatName="Council, government and democracy">
 <NarrowerItems CatName="">
  <Item Id="13" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" PageExists="true" CatName="Information management" ContainsPages="1" />
  </NarrowerItems>
  </Item>
<Item Id="93" Preferred="true" Default="true" AddedInVersion="1.00" LastUpdatedInVersion="1.00" PageExists="true" CatName="Community and living" ContainsPages="1" />
  </ItemsHierarchy>
-------------------------------------------------------------------



PLEASE HELP!
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Question by:gaetansavoie
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2 Comments
 
LVL 9

Accepted Solution

by:
s_sansanwal earned 500 total points
ID: 11758929
You are getting this error as in File2.xml "NarrowerItems" is the child of "Item" Element and it also has a child element by name "Item"

Rename "Item" element under NarrowerItems to NItem(example) and you would be able to read file into dataset

Then, you could loop through records to eliminate duplicate and add new records.

Cheers,
S Sansanwal

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LVL 2

Author Comment

by:gaetansavoie
ID: 11761468
Very clever.  Thanks! :)
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