Why XmlTextReader does not raise the FileNotFoundException

[bbindae]

I am trying to check whether XmlTextReader reads the xml file
successfully or not.

MSDN says that XmlTextReader raise the FileNotFoundException when it
cannot find the file to read.

Here is the source code I wrote.

string fileName = "thisfileneverexist.xml";
XmlTextReader xmlReader = null;

try
{
xmlReader = new XmlTextReader(fileName); // <---- this file does
not exist.
}
catch(Exception e)
{
// so, FileNotFoundException should be caught up here.
}

But the result is not what I expected because FileNotFoundException is
never raised.

So, how can i check XmlTextReader reads the xml file successfully?

Please help!!

[Jason Fay]

You need to read the file before the XMLTextReader tries to access it.
Right now, you're simply telling it where the file is, but not trying to
access it.

add xmlReader.read into your try / catch, and you will see the exception.

--
JASON FAY

<bb*****@hotmail.comwrote in message
news:f1**********************************@s19g2000 prg.googlegroups.com...

>I am trying to check whether XmlTextReader reads the xml file
successfully or not.

MSDN says that XmlTextReader raise the FileNotFoundException when it
cannot find the file to read.

Here is the source code I wrote.

string fileName = "thisfileneverexist.xml";
XmlTextReader xmlReader = null;

try
{
xmlReader = new XmlTextReader(fileName); // <---- this file does
not exist.
}
catch(Exception e)
{
// so, FileNotFoundException should be caught up here.
}

But the result is not what I expected because FileNotFoundException is
never raised.

So, how can i check XmlTextReader reads the xml file successfully?

Please help!!

[Martin Honnen]

bb*****@hotmail.com wrote:

I am trying to check whether XmlTextReader reads the xml file
successfully or not.

MSDN says that XmlTextReader raise the FileNotFoundException when it
cannot find the file to read.

Here is the source code I wrote.

string fileName = "thisfileneverexist.xml";
XmlTextReader xmlReader = null;

try
{
xmlReader = new XmlTextReader(fileName); // <---- this file does
not exist.
}
catch(Exception e)
{
// so, FileNotFoundException should be caught up here.
}

But the result is not what I expected because FileNotFoundException is
never raised.

So, how can i check XmlTextReader reads the xml file successfully?

If the file does not exist then XmlTextReader will throw the
FileNotFoundException on the first Read() call.

However with .NET 2.0 and later the preferred way to create an XmlReader
is XmlReader.Create("file.xml") and I think that throws on the Create
call without requiring a Read() call.
--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/