I am trying to add an XML node to multiple parent nodes(which have same name). But it is only adding to the Last node of the XML and not in all.
input XML
<Record>
<Emp>
<ID>12</ID>
<Name>ABC</Name>
</Emp>
<Emp>
<ID>12</ID>
<Name>ABC</Name>
</Emp>
</Record>
I want to add the Location element to every Emp node. My code is as below:
XmlNodeList xNodeList = doc.SelectNodes("/Record/Emp");
XmlElement xNewChild = doc.CreateElement("Location");
xNewChild.InnerText = "USA";
foreach (XmlNode item in xNodeList)
{
item.AppendChild(xNewChild);
}
doc.Save(path);
but I am getting output like this:
<Record>
<Emp>
<ID>12</ID>
<Name>ABC</Name>
</Emp>
<Emp>
<ID>12</ID>
<Name>ABC</Name>
<Location>USA</Location>
</Emp>
</Record>
The Location element has not been added to the first Emp node.
Note: After debugging, I am able to find that the element has been added even for the first Emp node. But, in the saved XML file I am seeing this strange behavior.
Your xNewChild is a single new element. Simply adding it to multiple nodes will only serialize to the last node. A change like this should work:
XmlNodeList xNodeList = doc.SelectNodes("/Record/Emp");
foreach (XmlNode item in xNodeList)
{
XmlElement xNewChild = doc.CreateElement("Location");
xNewChild.InnerText = "USA";
item.AppendChild(xNewChild);
}
doc.Save(path);
Related
Returned XML from URL:
<root>
<APIVersion>0.1</APIVersion>
<resource>persons</resource>
<search>givenname</search>
<query>andreas</query>
<limit>400</limit>
<results>
<item>
<persons>
<personId>21168</personId>
<givenName>Andreas</givenName>
<familyName>Garpe</familyName>
<email>andreas.garpe#t-fk.no</email>
<mobilePhone/>
<workPhone/>
<positions>...</positions>
</persons>
</item>
<item>...</item>
<item>...</item>
<item>...</item>
</results>
</root>
(Keep in mind that "item" is the objects with personnel info.)
I have a textbox defined as bunifuTextbox1.
I input a name, and it returns the names from the returned XML result and put all the names returned into a dropdown box.
private void button1_Click(object sender, EventArgs e)
{
string address = "http://ws.t-fk.no/?resource=persons&search=givenname&string=" + bunifuTextbox1.text;
XmlDocument doc1 = new XmlDocument();
doc1.Load(address);
XmlElement root = doc1.DocumentElement;
XmlNodeList nodes = root.SelectNodes("/results/item");
foreach (XmlNode node in nodes)
{
string tempf = node["persons"]["givenName"].InnerText;
bunifuDropdown1.AddItem(tempf);
}
}
I'm not sure why this doesen't work. Any help?
Your XPath is incorrect.
Instead of
XmlNodeList nodes = root.SelectNodes("/results/item");
try
XmlNodeList nodes = root.SelectNodes("results/item");
or
XmlNodeList nodes = root.SelectNodes("./results/item");
or
XmlNodeList nodes = root.SelectNodes("//results/item");
Use "results/item" or "./results/item" for an item element that is a child of a results element that is a child of the root node.
Using "//results/item" will select item elements that are children of results elements where the results element is anywhere in the XML.
First I want to find and select the PID"5678" from the <Tool>. With help of this PID, i want to find and select the ID"5678" from the <Parent>. The PID and the ID are the same value, but I have to find it from the <Tool> first.
At the moment I have following Code, to select the first PID. How can I "copy" this value and search with them the Attribute "ID"?
List<string> urls = xmldoc2.Descendants("PID").Select(x => x.Attribute("5678").Value).ToList();
<Tools>
<Tools>
<Tool>
<ID>1234</ID>
<PID>5678</PID>
<Name>Test</Name>
</Tool>
</Tools>
<Type>
<Parent>
<ID>5678</ID>
<PID>9999</PID>
<Name>Test2</Name>
</Parent>
</Type>
</Tools>
Notice that your Xml has multiple Root nodes - which does not work well.
So wrap it into single parent node (i.e. "Root" in below example)
Something of this sort should help you.
string xmlData = #"... Your Xml here....";
var xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlData);
var pidNodes = xmlDoc.SelectNodes("//Root/Tools/Tools/Tool/PID");
foreach(XmlNode node in pidNodes)
{
var typeNodeForPid = xmlDoc.SelectSingleNode(string.Format("//Root/Type/Parent[ID = '{0}']", node.InnerText));
}
I want to remove some child elements from an XML structure using RemoveChild() if a node is empty. My XML:
<Customers>
<customer>
<Name>John</Name>
<Age>25</Age>
<Status></Status>
</Customer>
<customer>
<Name>John</Name>
<Age></Age>
<Status></Status>
</Customer>
</Customers>
Should become:
<Customers>
<customer>
<Name>John</Name>
<Age>25</Age>
</Customer>
<customer>
<Name>John</Name>
</Customer>
</Customers>
My code so far:
XmlElement element3 = xmlDocument.CreateElement("Age");
element3.InnerText = str3;
element1.AppendChild((XmlNode)element3);
XmlElement element4 = xmlDocument.CreateElement("Status");
element4.InnerText = str4;
element1.AppendChild((XmlNode)element4);
How can I remove the empty node resp. nodes if there is more than one empty node?
Add a condition to only create the element if you need to:
if (!string.IsNullOrEmpty(status))
{
XmlElement statusElement = xmlDocument.CreateElement("Status");
statusElement.InnerText = status;
customerElement.AppendChild((XmlNode)statusElement);
}
Or if you need to remove it after it's already created (e.g. because you get XML from an external source with an empty Status), use the same sort of condition to remove it:
if (!string.IsNullOrEmpty(status))
{
customerElement.RemoveChild(statusElement);
}
That is because you are trying to remove a child element that simply does not exist. You must understand that in this context, the RemoveChild() method expects a reference to an existing node within the parent's children.
If i were to use your code sample above and create a standalone representation of this, it would look like this:
XmlDocument doc = new XmlDocument();
XmlElement element1 = doc.CreateElement("Customer");
XmlElement element2 = doc.CreateElement("Name");
element2.InnerText = "John";
element1.AppendChild(element2);
XmlElement element3 = doc.CreateElement("Age");
element3.InnerText = "25";
element1.AppendChild(element3);
XmlElement element4 = doc.CreateElement("Status");
element4.InnerText="";
element1.AppendChild(element4);
doc.AppendChild(element1);
element1.RemoveChild(element1.SelectSingleNode("Status"));
Using Linq-to-XML:
If you want nodes like:
<a>
<b>
<c></c>
</b>
</a>
to become:
<a />
Use:
XElement root = XElement.Load(file);
root.Descendants().Reverse().ToList().ForEach(x =>
{
if (x.IsEmpty)
x.Remove();
});
But if you want it to be:
<a>
<b />
</a>
Remove the .Reverse()
I have the following XML and query through the ID,how do get the Parent Hierarchy
<Child>
<Child1 Id="1">
<Child2 Id="2">
<Child3 Id="3">
<Child4 Id="4">
<Child5 Id="5"/>
<Child6 Id="6"/>
</Child4>
</Child3>
</Child2>
</Child1>
</Child>
In this if i query(Id = 4) and find out the Parent elements using Linq in the particular element how to get the following output with Hierarchy.
<Child>
<Child1 Id="1">
<Child2 Id="2">
<Child3 Id="3">
<Child4 Id="4"/>
</Child3>
</Child2>
</Child1>
</Child>
Thanks In Advance.
Assume you want just one node parent tree:
string xml = #"<Child>
<Child1 Id="1">
<Child2 Id="2">
<Child3 Id="3">
<Child4 Id="4">
<Child5 Id="5"/>
<Child6 Id="6"/>
</Child4>
</Child3>
</Child2>
</Child1>
</Child>";
TextReader tr = new StringReader(xml);
XDocument doc = XDocument.Load(tr);
IEnumerable<XElement> myList =
from el in doc.Descendants()
where (string)el.Attribute("Id") == "4" // here whatever you want
select el;
// select your hero element in some way
XElement hero = myList.FirstOrDefault();
foreach (XElement ancestor in hero.Ancestors())
{
Console.WriteLine(ancestor.Name); // rebuild your tree in a separate document, I print ;)
}
To search for every element of your tree iterate retrieve the node with the select query without the where clause and call the foreach for every element.
Based on the sample XML provided, you could walk up the tree to find the parent node once you've found the node in question:
string xml =
#"<Child>
<Child1 Id='1'>
<Child2 Id='2'>
<Child3 Id='3'>
<Child4 Id='4'>
<Child5 Id='5'/>
<Child6 Id='6'/>
</Child4>
</Child3>
</Child2>
</Child1>
</Child>";
var doc = XDocument.Parse( xml );
// assumes there will always be an Id attribute for each node
// and there will be an Id with a value of 4
// otherwise an exception will be thrown.
XElement el = doc.Root.Descendants().First( x => x.Attribute( "Id" ).Value == "4" );
// discared all child nodes
el.RemoveNodes();
// walk up the tree to find the parent; when the
// parent is null, then the current node is the
// top most parent.
while( true )
{
if( el.Parent == null )
{
break;
}
el = el.Parent;
}
In Linq to XML there is a method called AncestorsAndSelf on XElement that
Returns a collection of elements that contain this element, and the
ancestors of this element.
But it will not transform your XML tree the way you want it.
What you want is:
For a given element, find the parent
Remove all elements from parent but the given element
Remove all elements from the given element
Something like this in Linq (no error handling):
XDocument doc = XDocument.Parse("<xml content>");
//finding element having 4 as ID for example
XElement el = doc.Descendants().First(el => el.Attribute("Id").Value == "4");
el.RemoveNodes();
XElement parent = el.Parent;
parent.RemoveNodes();
parent.Add(el);
[Edit]
doc.ToString() must give you what you want as a string.
[Edit]
Using RemoveNodes instead of RemoveAll, the last one also removes attributes.
Removing nodes from the chosen element too.
I found the following way
XElement elementNode = element.Descendants()
.FirstOrDefault(id => id.Attribute("id").Value == "4");
elementNode.RemoveNodes();
while (elementNode.Parent != null)
{
XElement lastNode = new XElement(elementNode);
elementNode = elementNode.Parent;
elementNode.RemoveNodes();
elementNode.DescendantsAndSelf().Last().AddFirst(lastNode);
}
return or Print elementNode.
I have the following XML.
<ArrayOfString xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://localhost/gsainis/GsaInisWebService">
<string>
<gsafeed>
<group action="add">
<record>
......
......
</record>
</group>
</gsafeed>
</string>
</ArrayOfString>
I am using C# code (.NET 4.0) to parse this XML. I am using the code below to select all <record> nodes in the above XML.
XmlNamespaceManager xmlnsmgr = new XmlNamespaceManager(INISRecordXMLdoc.NameTable);
xmlnsmgr.AddNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
xmlnsmgr.AddNamespace("xsd", "http://www.w3.org/2001/XMLSchema");
xmlnsmgr.AddNamespace(string.Empty, "http://localhost/gsainis/GsaInisWebService");
foreach (XmlNode node in INISRecordXMLdoc.SelectNodes("//ArrayOfString/string/gsafeed/group/record",xmlnsmgr))
{
//Do something
}
The problem is the foreach loop is never executed. What should be correct XPath to be used such that I get all the <record> nodes?
Try this - I've had trouble in the past with having an "empty" XML prefix:
XmlNamespaceManager xmlnsmgr = new XmlNamespaceManager(INISRecordXMLdoc.NameTable);
xmlnsmgr.AddNamespace("ns", "http://localhost/gsainis/GsaInisWebService");
foreach (XmlNode node in INISRecordXMLdoc.SelectNodes("//ns:ArrayOfString/ns:string/ns:gsafeed/ns:group/ns:record", xmlnsmgr))
{
// Do something
}
Use something other than an empty string - and use that XML namespace prefix in your XPath.