Question

Removing an XML node using xmlDocument and C#

Asked by: wilfordrocks

This is a minor problem, but if you have input I would appreciate it.
I want to remove all the nodes anywhere in an XML document that have element name No_export_rule.
The code below almost does this.  It removes all the attributes and so forth but leaves behind an empty element.  I would like to remove the elements rather than just empty them.
Thanks for your input.
//AFTER THE CODE RUNS
<No_Export_Rule>
    </No_Export_Rule>
    <No_Export_Rule>
    </No_Export_Rule>
    <No_Export_Rule>
    </No_Export_Rule>
//BEFORE THE CODE RUNS
<No_Export_Rule Lbl='Locality' Table='Report' Field='ORI_NO' Pl='0' Ctl='IDRTC_LOCALITY'><![CDATA[1005]]></No_Export_Rule>
<No_Export_Rule Lbl='Predominant Development Type' COPY='DEVEL' Table='Report' Field='HOW_RPTD' Pl='0' Ctl='IDRTC_PRED_DEV_TYPE'><![CDATA[1006]]></No_Export_Rule>
<No_Export_Rule COPY='E1' Table='Address' Row='Addrept' Field='ATNRBTW' Ctl='IDC_FTMILE_NODE_1'><![CDATA[In]]></No_Export_Rule>

virtual public void HTE_RemoveUselessElements()
        {
            XmlNodeList nodes = m_xmlDocument.GetElementsByTagName "No_Export_Rule"); 
            foreach (XmlNode node in nodes)
            {
               node.RemoveAll();this results in as bunch of empty nodes but the entry is still there
            }
        }

                                  
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Asked On
2009-06-05 at 06:44:07ID24466948
Tags

xml

,

remove node

Topics

XPath

,

C# Programming Language

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: csharppPosted on 2009-06-05 at 06:58:00ID: 24556444

node.RemoveAll() removes only the attributes and child nodes.
You have to use m_xmlDocument.RemoveChild(node) instead of node.RemoveAll();

 

by: angus_young_acdcPosted on 2009-06-05 at 08:54:48ID: 24557651

The following code should help you out, just done in notepad so best to check it

XmlDocument myDocument = new XmlDocument();
            myDocument.Load(docLocation);
            XmlNodeList list = myDocument.SelectNodes(theNodes);
            XmlNode node;
            for (int i = 0; i < list.Count; i++)
            {
                node = list[i];
                node.ParentNode.RemoveChild(node);
                myDocument.Save(docLocation);
            }

                                              
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by: csharppPosted on 2009-06-05 at 09:02:40ID: 24557738

Yes, using node.ParentNode.RemoveChild(node) is required if the node to remove is not located under the root element.

virtual public void HTE_RemoveUselessElements()
        {
            XmlNodeList nodes = m_xmlDocument.GetElementsByTagName("No_Export_Rule");
            foreach (XmlNode node in nodes)
            {
               node.ParentNode.RemoveChild(node);
            }
        }

                                              
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by: wilfordrocksPosted on 2009-06-05 at 10:36:51ID: 31589243

All of these answers were excellent and correct.  This one was the most clear.

20120131-EE-VQP-002

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