XmlTextReader fails on reading DOCTYPE?

[keldan]

I am hoping someone on this list can shed some light on
the below issue for me. I am using XmlTextReader to read
from an XML file. Unfortunately, an exception is thrown
("Index was outside the bounds of the array.") when the
reader reaches the DOCTYPE. If I remove it everything
works fine. Should I be handling the DOCTYPE someway
before I read the DOCTYPE? Any insight would be greatly
appreciated. I have provided a sample XML document plus
some simple code.

Cheers,

------------------ Begin Document ------------------------
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE ONIXmessage
SYSTEM "http://www.editeur.org/onix/2.0/short/onix-
international.dtd">
<ONIXmessage>
<header>
<m173>3983939393</m173>
<m174>Me Vendor</m174>
<m175>Full Name</m175>
<m180>1</m180>
<m182>200306221017</m182>
<m183>Description</m183>
</header>
<product>
<a001>0761501877</a001>
<a002>04</a002>
<b004>0761501877</b004>
<b005>9780761501862</b005>
<b012>BC</b012>
<b028>The Michael Story</b028>
<b029>What's It Like To Be Me</b029>
<contributor>
<b034>1</b034>
<b035>A01</b035>
<b036>Michael Muffett</b036>
<b037>Muffett, Michael</b037>
<b039>Michael</b039>
<b040>Muffett</b040>
<b043>L.</b043>
</contributor>
<b059>eng</b059>
<b061>1000</b061>
<b064>FIC000000</b064>
<b079>Muffett Publishing</b079>
<imprint>
<b241>02</b241>
<b243>PL</b243>
<b079>Muffett Publishing</b079>
</imprint>
<b081>Muffett Publishing</b081>
<b003>19951018</b003>
<supplydetail>
<j136>2013975</j136>
<j137>Random House</j137>
<j138>CA</j138>
<j141>IP</j141>
<j143>20031018</j143>
<j145>24</j145>
<price>
<j148>01</j148>
<j151>260.95</j151>
<j152>CAD</j152>
</price>
</supplydetail>
</product>
</ONIXmessage>
-------------------- End Document ----------------------

-------------------- Begin Code ------------------------
public static void loadDocument(string fileName)
{
XmlTextReader onixTextReader
= new XmlTextReader(fileName);
try
{
onixTextReader.Read();
MessageBox.Show("Declaration: " +
onixTextReader.NodeType.ToString());
onixTextReader.Read();
MessageBox.Show("Second
Line WhiteSpace: " + onixTextReader.NodeType.ToString());
onixTextReader.ReadString
();
MessageBox.Show
(onixTextReader.NodeType.ToString());
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
---------------------- End Code --------------------------

[Kathleen Dollard]

Have you gotten this solved?

I don't think the problem is the DOCTYPE element itself. It is in the
XMLNodeType enum, and the XMLTextReader.Read documentation happens ot
include it. Which specific line of code throws the exception?

--
Kathleen Dollard
Microsoft MVP
Author "Code Generation in Microsoft .NET"
"keldan" <an*******@discussions.microsoft.com> wrote in message
news:00****************************@phx.gbl...

I am hoping someone on this list can shed some light on
the below issue for me. I am using XmlTextReader to read
from an XML file. Unfortunately, an exception is thrown
("Index was outside the bounds of the array.") when the
reader reaches the DOCTYPE. If I remove it everything
works fine. Should I be handling the DOCTYPE someway
before I read the DOCTYPE? Any insight would be greatly
appreciated. I have provided a sample XML document plus
some simple code.

Cheers,

------------------ Begin Document ------------------------
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE ONIXmessage
SYSTEM "http://www.editeur.org/onix/2.0/short/onix-
international.dtd">
<ONIXmessage>
<header>
<m173>3983939393</m173>
<m174>Me Vendor</m174>
<m175>Full Name</m175>
<m180>1</m180>
<m182>200306221017</m182>
<m183>Description</m183>
</header>
<product>
<a001>0761501877</a001>
<a002>04</a002>
<b004>0761501877</b004>
<b005>9780761501862</b005>
<b012>BC</b012>
<b028>The Michael Story</b028>
<b029>What's It Like To Be Me</b029>
<contributor>
<b034>1</b034>
<b035>A01</b035>
<b036>Michael Muffett</b036>
<b037>Muffett, Michael</b037>
<b039>Michael</b039>
<b040>Muffett</b040>
<b043>L.</b043>
</contributor>
<b059>eng</b059>
<b061>1000</b061>
<b064>FIC000000</b064>
<b079>Muffett Publishing</b079>
<imprint>
<b241>02</b241>
<b243>PL</b243>
<b079>Muffett Publishing</b079>
</imprint>
<b081>Muffett Publishing</b081>
<b003>19951018</b003>
<supplydetail>
<j136>2013975</j136>
<j137>Random House</j137>
<j138>CA</j138>
<j141>IP</j141>
<j143>20031018</j143>
<j145>24</j145>
<price>
<j148>01</j148>
<j151>260.95</j151>
<j152>CAD</j152>
</price>
</supplydetail>
</product>
</ONIXmessage>
-------------------- End Document ----------------------

-------------------- Begin Code ------------------------
public static void loadDocument(string fileName)
{
XmlTextReader onixTextReader
= new XmlTextReader(fileName);
try
{
onixTextReader.Read();
MessageBox.Show("Declaration: " +
onixTextReader.NodeType.ToString());
onixTextReader.Read();
MessageBox.Show("Second
Line WhiteSpace: " + onixTextReader.NodeType.ToString());
onixTextReader.ReadString
();
MessageBox.Show
(onixTextReader.NodeType.ToString());
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
---------------------- End Code --------------------------

[keldan]

Sadly I have not solved this issue yet. For the life of me I can't
understand what is wrong. The the pointer for the reader can't seem
to read past the DOCTYPE. If i use a while loop:

while(!reader.EOF)
{
reader.Read()
MessageBox.Show(reader.NodeType.ToString());
}

It will read the XML declaration, the whitespace that comes after the
declaration and then an exception is thrown from the reader.Read()
when the pointer for the reader points to the next node (which I am
assuming is the DOCTYPE).

The output from the Stack Trace is:

at System.XmlScanner.ScanDtdContent()
at System.Xml.Schema.DtdParser.ScanDtdContent()
at System.Xml.Schema.DtdParser.ParseDtdContent()
at System.Xml.Schema.DtdParser.ParseDocTypeDecl()
at System.Xml.Schema.DtdParser.Parse()
at System.Xml.XmlTextReader.ParseDtd(XmlScanner scanner)
at System.Xml.XmlTextReader.ParseTag()
at System.Xml.XmlTextReader.ParseRoot()
at System.Xml.XmlTextReader.Read()
at MainMenuForm1.loadDocument(String fileName) in C:\vs projects\
mainmenuform\form1.cs:line 326

line 326 is reader.Read();

As I said earlier for the life of me I can't understand why it can't
read past the DOCTYPE. It's such a simple while loop statement that
just outputs the nodetype to a MessageBox. I am new to using the
System.Xml namespace so any more light you can shed on this matter
will be greatly appreciated - I am at quite confused with this
problem. I have gone over the online documentation, visited
messageboards and can find no solution to this problem.

Cheers,

Mick

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[Martin Honnen]

keldan wrote:

Sadly I have not solved this issue yet. For the life of me I can't
understand what is wrong. The the pointer for the reader can't seem
to read past the DOCTYPE. If i use a while loop:

while(!reader.EOF)
{
reader.Read()
MessageBox.Show(reader.NodeType.ToString());
}

It will read the XML declaration, the whitespace that comes after the
declaration and then an exception is thrown from the reader.Read()
when the pointer for the reader points to the next node (which I am
assuming is the DOCTYPE).

The output from the Stack Trace is:

at System.XmlScanner.ScanDtdContent()
at System.Xml.Schema.DtdParser.ScanDtdContent()
at System.Xml.Schema.DtdParser.ParseDtdContent()
at System.Xml.Schema.DtdParser.ParseDocTypeDecl()
at System.Xml.Schema.DtdParser.Parse()
at System.Xml.XmlTextReader.ParseDtd(XmlScanner scanner)
at System.Xml.XmlTextReader.ParseTag()
at System.Xml.XmlTextReader.ParseRoot()
at System.Xml.XmlTextReader.Read()
at MainMenuForm1.loadDocument(String fileName) in C:\vs projects\
mainmenuform\form1.cs:line 326

line 326 is reader.Read();

As far as I see it currently the XmlTextReader reads in the DTD from
http://www.editeur.org/onix/2.0/shor...ernational.dtd and fails
to parse it.
I tried validating the XML in your first post with MSXML 4 and it didn't
have any problems with the DTD so there might be a bug in .NET's DTD parser.

--

Martin Honnen
http://JavaScript.FAQTs.com/