I already implemented to create the XML file below with XmlTextWriter when application initialization.
And know I don't know how to update the childNode id value with XmlDocument & XmlNode.
Is there some property to update the id value? I tried InnerText but failed. thank you.
<?xml version="1.0" encoding="UTF-8"?>
<Equipment xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<License licenseId="" licensePath=""/>
<DataCollections>
<GroupAIDs>
<AID id="100">
<Variable id="200"/>
<Variable id="201"/>
</AID>
<AID id="">
<Variable id="205"/>
</AID>
<AID id="102"/>
</GroupAIDs>
<GroupBIDs>
<BID id="2000">
<AID id="100"/>
</BID>
<BID id="2001">
<AID id="101"/>
<AID id="102"/>
</BID>
</GroupBIDs>
<GroupCIDs>
<BID id="8"/>
<BID id="9"/>
<BID id="10"/>
</GroupCIDs>
</DataCollections>
</Equipment>
This question is related to
c#
xml
xmldocument
xmlnode
You need to do something like this:
// instantiate XmlDocument and load XML from file
XmlDocument doc = new XmlDocument();
doc.Load(@"D:\test.xml");
// get a list of nodes - in this case, I'm selecting all <AID> nodes under
// the <GroupAIDs> node - change to suit your needs
XmlNodeList aNodes = doc.SelectNodes("/Equipment/DataCollections/GroupAIDs/AID");
// loop through all AID nodes
foreach (XmlNode aNode in aNodes)
{
// grab the "id" attribute
XmlAttribute idAttribute = aNode.Attributes["id"];
// check if that attribute even exists...
if (idAttribute != null)
{
// if yes - read its current value
string currentValue = idAttribute.Value;
// here, you can now decide what to do - for demo purposes,
// I just set the ID value to a fixed value if it was empty before
if (string.IsNullOrEmpty(currentValue))
{
idAttribute.Value = "515";
}
}
}
// save the XmlDocument back to disk
doc.Save(@"D:\test2.xml");
Source: Stackoverflow.com