Array Bounds Exception inside system.xml.dll. Test data is a dozen GB (available for the asking on CD). Source code follows. Call into system.xml.dll happens at the while statement..
using System
using System.Xml
using System.Collecti ons
// This program reads an ASCII file of XML elements
// The output is a list of unique NODE TYPEs
// For example, <head> produces head in the output
// There is no validation of the XML
namespace xmlReaderAp
/// <summary
/// Summary description for Class1
/// </summary
class Class
/// <summary
/// The main entry point for the application
/// </summary
[STAThread
static void Main(string[] args
int symbolNumber=0
ArrayList arrayList = new ArrayList()
XmlTextReader xmlReader = new XmlTextReader(@ "c:\1.xml")
tr
xmlReader.MoveT oContent(); // Get beyond the DTD which we don't care abou
catch (Exception e
Console.WriteLi ne("Exception: " + e.Message); // handle undefined DT
try
while (xmlReader.Read ())
symbolNumber++
if (symbolNumber % 100000 == 0
Console.WriteLi ne(symbolNumber )
switch (xmlReader.Node Type)
case XmlNodeType.Ele ment
// Console.Write(" <{0}>", xmlReader.Name)
bool bDoAdd = true
foreach (String memberofArrayLi st in arrayList
if (memberofArrayL ist.Equals(xmlR eader.Name)
bDoAdd = false
break
if (bDoAdd
arrayList.Add(x mlReader.Name)
break
case XmlNodeType.Tex t
// Console.Write(x mlReader.Value)
break
case XmlNodeType.CDA TA
// Console.Write(" <![CDATA[{0}]]>", xmlReader.Value )
break
case XmlNodeType.Pro cessingInstruct ion
// Console.Write(" <?{0} {1}?>", xmlReader.Name, xmlReader.Value )
break
case XmlNodeType.Com ment
// Console.Write(" <!--{0}-->", xmlReader.Value )
break
case XmlNodeType.Xml Declaration
// Console.Write(" <?xml version='1.0'?> ")
break
case XmlNodeType.Doc ument
break
case XmlNodeType.Doc umentType
// Console.Write(" <!DOCTYPE {0} [{1}]", xmlReader.Name, xmlReader.Value )
break
case XmlNodeType.Ent ityReference
// Console.Write(x mlReader.Name)
break
case XmlNodeType.End Element
// Console.Write(" </{0}>", xmlReader.Name)
break
xmlReader.Close ()
foreach (String memberofArrayLi st in arrayList
Console.WriteLi ne(memberofArra yList)
Console.WriteLi ne("This program has terminated.")
catch(Exception e)
xmlReader.Close ()
Console.WriteLi ne("Exception: " + e.Message)
Console.WriteLi ne(e.StackTrace )
Console.WriteLi ne(e.Source)
foreach (String memberofArrayLi st in arrayList
Console.WriteLi ne(memberofArra yList)
Console.WriteLi ne("This program has terminated.")
return
4  3849 
William McIlroy wrote: Array Bounds Exception inside system.xml.dll. Test data is a dozen GB (available for the asking on CD). Source code follows. Call into system.xml.dll happens at the while statement...
Dozen GB XML document???? Holy cow! :)
Provide more info please: .NET version, exact exception message along
with full stack trace.
Should note also - the following loop:
foreach (String memberofArrayLi st in arrayList)
if (memberofArrayL ist.Equals(xmlR eader.Name))
is a way ineffective, you can get huge raise in performance using
Hashtable instead of ArrayList.
--
Oleg Tkachenko [XML MVP, XmlInsider] http://blog.tkachenko.com
Exception: Index was outside the bounds of the array
at System.Xml.XmlT extReader.SetEl ementValues(
at System.Xml.XmlT extReader.Parse Element(
at System.Xml.XmlT extReader.Read(
at xmlReaderApp.Cl ass1.Main(Strin g[] args
A first chance exception of type 'System.IndexOu tOfRangeExcepti on' occurred in system.xml.dl
Additional information: Index was outside the bounds of the array
1.1.4322 VERSION of .NE
Since I wrote the program for myself, I don't care about performance. It is fast enough for me
You heard correctly: 11 gigabytes. It is generated by a National Institutes of Health conversion program
But thanks for the advice
Originally, the structured data is in ASN.1 format.
William McIlroy wrote: Exception: Index was outside the bounds of the array.
at System.Xml.XmlT extReader.SetEl ementValues()
at System.Xml.XmlT extReader.Parse Element()
at System.Xml.XmlT extReader.Read( )
at xmlReaderApp.Cl ass1.Main(Strin g[] args)
Apparently 2Gb is the limitation of the XmlTextReader. See http://groups.google.com/groups?hl=e...A11%26rnum%3D1
--
Oleg Tkachenko [XML MVP] http://blog.tkachenko.com
Very well. I'll write my business application in Java.
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