Delete attribute from XML document using XPathNodeIterator

[Kindler Chase]

I'm trying to iterate through a set of nodes and then edit/delete
specific attributes using XPathNodeIterat or. Adding attributes is no
problem.

My first question is how do I delete an attribute using an
XPathNodeIterat or? Or should I be using something else?

In the sample that follows:
1. Grab all "Page" nodes.
2. Loop through all the nodes.
3. delete the "lastModifi ed" attribute.
4. Will eventually just want to edit the "lastModifi ed" attribute.

C#3/x
Sample method:
public void test()
{
XPathDocument doc = new XPathDocument( "pathToXML" );
XPathNavigator nav = doc.CreateNavig ator();
XPathNodeIterat or iterator = nav.Select( "//Section/Page" );
while( iterator.MoveNe xt() )
{
XPathNavigator node = iterator.Curren t;
string lastModifiedAtt ribute =
node.GetAttribu te( "lastModifi ed", "" );

// Actions will vary, but will consist of:
// 1. add attribute
// 2. delete attribute
// 3. edit attribute
}
}


Sample XML:
<?xml version="1.0"?>
<SiteMap>
<Section>
<Page nav="topic1" lastModified="2 0081005" />
<Page nav="topic2" lastModified="2 0081001" />
</Section>
<Section>
<Page nav="topic3" lastModified="2 0081002" />
<Section>
<Page nav="topic4" lastModified="2 0081004" />
<Section>
<Page nav="topic5" lastModified="2 0081003" />
<Page nav="topic6" lastModified="2 0081009" />
</Section>
</Section>
</Section>
<Section>
<Page nav="topic7" lastModified="2 0081012" />
<Page nav="topic8" lastModified="2 0081015" />
<Page nav="topic9" lastModified="2 0081007" />
</Section>
</SiteMap>


Thanks in advance!
::k::

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Re: Delete attribute from XML document using XPathNodeIterat or

Kindler Chase wrote:

I'm trying to iterate through a set of nodes and then edit/delete
specific attributes using XPathNodeIterat or. Adding attributes is no
problem.
>
My first question is how do I delete an attribute using an
XPathNodeIterat or? Or should I be using something else?
>
In the sample that follows:
1. Grab all "Page" nodes.
2. Loop through all the nodes.
3. delete the "lastModifi ed" attribute.
4. Will eventually just want to edit the "lastModifi ed" attribute.
>
C#3/x
Sample method:
public void test()
{
XPathDocument doc = new XPathDocument( "pathToXML" );

First problem is that XPathDocument is read only !

You need to switch to XmlDocument. It should not be a
problem to do what you want on an XmlElement.

Arne

[Kindler Chase]

Re: Delete attribute from XML document using XPathNodeIterat or

Arne Vajhøj wrote:

Kindler Chase wrote:

>I'm trying to iterate through a set of nodes and then edit/delete
>specific attributes using XPathNodeIterat or. Adding attributes is no
>problem.
>>
>My first question is how do I delete an attribute using an
>XPathNodeItera tor? Or should I be using something else?
>>
>In the sample that follows:
>1. Grab all "Page" nodes.
>2. Loop through all the nodes.
>3. delete the "lastModifi ed" attribute.
>4. Will eventually just want to edit the "lastModifi ed" attribute.
>>
>C#3/x
>Sample method:
>public void test()
>{
> XPathDocument doc = new XPathDocument( "pathToXML" );

>
First problem is that XPathDocument is read only !
>
You need to switch to XmlDocument. It should not be a
problem to do what you want on an XmlElement.
>
Arne

Sorry for the mis-post, it actually *is* an XmlDocument - when I wrote
up the example, I mis-typed.

The problem still remains - when iterating through the nodes with the
XPathNodeiterat or, I am unable to delete an attribute. Can you post an
example of iterating through and deleting an attribute?

Thanks!
::k::

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Re: Delete attribute from XML document using XPathNodeIterat or

Arne Vajhøj wrote:

Kindler Chase wrote:

>I'm trying to iterate through a set of nodes and then edit/delete
>specific attributes using XPathNodeIterat or. Adding attributes is no
>problem.
>>
>My first question is how do I delete an attribute using an
>XPathNodeItera tor? Or should I be using something else?
>>
>In the sample that follows:
>1. Grab all "Page" nodes.
>2. Loop through all the nodes.
>3. delete the "lastModifi ed" attribute.
>4. Will eventually just want to edit the "lastModifi ed" attribute.
>>
>C#3/x
>Sample method:
>public void test()
>{
> XPathDocument doc = new XPathDocument( "pathToXML" );

>
First problem is that XPathDocument is read only !
>
You need to switch to XmlDocument. It should not be a
problem to do what you want on an XmlElement.

Code snippet:

XmlDocument doc = new XmlDocument();
doc.LoadXml(xml );
doc.Save(Consol e.Out);
foreach(XmlNode n in doc.SelectNodes ("//*[@lastModified]"))
{
n.Attributes.Re moveNamedItem(" lastModified");
}

Arne

[=?ISO-8859-1?Q?Arne_Vajh=F8j?=]

Re: Delete attribute from XML document using XPathNodeIterat or

Kindler Chase wrote:

Arne Vajhøj wrote:

>Kindler Chase wrote:

>>I'm trying to iterate through a set of nodes and then edit/delete
>>specific attributes using XPathNodeIterat or. Adding attributes is no
>>problem.
>>>
>>My first question is how do I delete an attribute using an
>>XPathNodeIter ator? Or should I be using something else?
>>>
>>In the sample that follows:
>>1. Grab all "Page" nodes.
>>2. Loop through all the nodes.
>>3. delete the "lastModifi ed" attribute.
>>4. Will eventually just want to edit the "lastModifi ed" attribute.
>>>
>>C#3/x
>>Sample method:
>>public void test()
>>{
>> XPathDocument doc = new XPathDocument( "pathToXML" );

>>
>First problem is that XPathDocument is read only !
>>
>You need to switch to XmlDocument. It should not be a
>problem to do what you want on an XmlElement.

>
Sorry for the mis-post, it actually *is* an XmlDocument - when I wrote
up the example, I mis-typed.

Always copy paste the real code !

The problem still remains - when iterating through the nodes with the
XPathNodeiterat or, I am unable to delete an attribute. Can you post an
example of iterating through and deleting an attribute?

Just posted an example.

Arne

[Kindler Chase]

Re: Delete attribute from XML document using XPathNodeIterat or

Arne Vajhøj wrote:

>Sorry for the mis-post, it actually *is* an XmlDocument - when I wrote
>up the example, I mis-typed.

>
Always copy paste the real code !

Will do :)

>The problem still remains - when iterating through the nodes with the
>XPathNodeitera tor, I am unable to delete an attribute. Can you post an
>example of iterating through and deleting an attribute?

>
Just posted an example.

Thanks for the post/example! I'll hit it again tomorrow.

::k::

[Kindler Chase]

Re: Delete attribute from XML document using XPathNodeIterat or

Arne Vajhøj wrote:

Code snippet:
>
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml );
doc.Save(Consol e.Out);
foreach(XmlNode n in doc.SelectNodes ("//*[@lastModified]"))
{
n.Attributes.Re moveNamedItem(" lastModified");
}

Thanks Arne! It's all sorted out now. Appreciate your help.

::k::