CODEWITHSUNDEEP
c#xml
Gentle
Gentle

Reputation: 87

Target specific Xml Node in c#

As I said in the Title: I'm trying to delete a specific XML node(in c#).

so I researched and found this:

XmlDocument xmlDoc = new XmlDocument();
XmlNode nodeToDelete = xmlDoc.SelectSingleNode("/root/XMLFileName[@ID="+nodeId+"]");
        if (nodeToDelete != null)
        {
            nodeToDelete.ParentNode.RemoveChild(nodeToDelete);
        }
        xmlDoc.Save("XMLFileName.xml")

I understand here that he's targeting a specific node ( in this case "[@ID ="+nodeId+)

Ok, my question is can I do the same just in the opposite way, by that I mean if its not nodeId then delete it (just like the "!="-Operator in C#).

Upvotes: 0

Views: 447

Answers (1)

artragis
artragis

Reputation: 3713

First of all, the code you posted uses SelectSingleNode which will allways return only one node.

First thing to do : using SelectNodes whose doc is here.

THe result would be :

List<XmlNode> nodes =  new List<XmlNode>(
    xmlDoc.SelectNodes("//root/XMLFileName[@ID!="+nodeId+"]")
        .Cast<XmlNode>());//execute the query and put it into a list
// as my list is strongly typed, I **must** use cast method
// thanks to this list, I can modify the document without changing the 
// collection that foreach is traversing
foreach(var nodeToDelete in nodes){
    if (nodeToDelete != null)
    {
        nodeToDelete.ParentNode.RemoveChild(nodeToDelete);
    }

}
xmlDoc.Save("XMLFileName.xml")

You can also use a linq query as you are in C# as explained here.

Upvotes: 2

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