Why output of WriteNode is not in XML format?

[Frank Meng]

Hi.
I got some sample codes from Fig 10 of
http://msdn.microsoft.com/msdnmag/is...L/default.aspx
..
If I read an XML file like:
<test>
<good>1</good>
</test>
The output becomes:
<test>
1
</test>
Why WriteNode dropped the "good" tag?
I want to read an XML file and output an XML file.
Please tell me how to use the following codes.(I modified it a little
bit)
Thank you,
-----------------------------------------------------------------
using System;
using System.Xml;
using System.IO;
using System.Xml.Schema;
// ...
XmlTextReader reader = new XmlTextReader(@"c:\test.xml");
XmlTextWriter writer = new XmlTextWriter(Console.Out);

// Configure reader and writer
writer.Formatting = Formatting.Indented;
reader.MoveToContent();

// Write the root
writer.WriteStartElement(reader.LocalName);

// Read and output every other node
int i=0;
while(reader.Read())
{
// if (i % 2)
writer.WriteNode(reader, false);
i++;
}

// Close the root
writer.WriteEndElement();

// Close reader and writer
writer.Close();
reader.Close();

[Oleg Tkachenko [MVP]]

Frank Meng wrote:

I got some sample codes from Fig 10 of
http://msdn.microsoft.com/msdnmag/is...L/default.aspx
.
If I read an XML file like:
<test>
<good>1</good>
</test>
The output becomes:
<test>
1
</test> // Read and output every other node

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Note above.

--
Oleg Tkachenko [XML MVP, XmlInsider]
http://blog.tkachenko.com

[Frank Meng]

As I wrote in my first message, I modified the codes.
I commented out line "// if (i % 2)". The new codes should print
out every line.
Also, the program didn't skip the line, it only dropped the tag and
printed the value.

Frank

"Oleg Tkachenko [MVP]" <oleg@NO!SPAM!PLEASEtkachenko.com> wrote in message news:<ed**************@TK2MSFTNGP10.phx.gbl>...

Frank Meng wrote:

I got some sample codes from Fig 10 of
http://msdn.microsoft.com/msdnmag/is...L/default.aspx
.
If I read an XML file like:
<test>
<good>1</good>
</test>
The output becomes:
<test>
1
</test>

// Read and output every other node

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Note above.

[Oleg Tkachenko [MVP]]

Frank Meng wrote:

As I wrote in my first message, I modified the codes.
I commented out line "// if (i % 2)". The new codes should print
out every line.

Well, then there is something wrong in your code. Actually the pattern
of writing all XMlReader reads as is is as simple as

XmlTextReader r = new XmlTextReader("foo.xml");
XmlTextWriter w = new XmlTextWriter(Console.Out);
while (r.Read())
w.WriteNode(r, false);
r.Close();
w.Close();

--
Oleg Tkachenko [XML MVP, XmlInsider]
http://blog.tkachenko.com

[Frank Meng]

Thank you for your message.
After I added
reader.WhitespaceHandling = WhitespaceHandling.None;
, the program will output in XML format.
But it won't read the file line by line.
Without the above line, or with
reader.WhitespaceHandling = WhitespaceHandling.All;
, the program will read the file line by line, but the output drops
all XML tags like I mentioned before.
I want to read the information, process the information and append new
data to the XML file.
So I want to read it line by line so I can get the information and
output in XML format.
Please let me know how I can do it.
Frank

"Oleg Tkachenko [MVP]" <oleg@NO!SPAM!PLEASEtkachenko.com> wrote in message news:<u$**************@TK2MSFTNGP10.phx.gbl>...

Frank Meng wrote:

As I wrote in my first message, I modified the codes.
I commented out line "// if (i % 2)". The new codes should print
out every line.

Well, then there is something wrong in your code. Actually the pattern
of writing all XMlReader reads as is is as simple as

XmlTextReader r = new XmlTextReader("foo.xml");
XmlTextWriter w = new XmlTextWriter(Console.Out);
while (r.Read())
w.WriteNode(r, false);
r.Close();
w.Close();

[Oleg Tkachenko [MVP]]

Frank Meng wrote:

After I added
reader.WhitespaceHandling = WhitespaceHandling.None;
, the program will output in XML format.
But it won't read the file line by line.
What do you mean? XmlReader doesn't read line by line. It reads node by
node.
Without the above line, or with
reader.WhitespaceHandling = WhitespaceHandling.All;
, the program will read the file line by line, but the output drops
all XML tags like I mentioned before.

Sorry, I cannot reproduce the problem. Provided input XML is
<test>
<good>1</good>
</test>

the code:

XmlTextReader r = new XmlTextReader("foo.xml");
r.WhitespaceHandling = WhitespaceHandling.All;
XmlTextWriter w = new XmlTextWriter(Console.Out);
while (r.Read())
w.WriteNode(r, false);
r.Close();
w.Close();

outputs

<test>
<good>1</good>
</test>

--
Oleg Tkachenko [XML MVP, XmlInsider]
http://blog.tkachenko.com