Lets say i have this simple xml:
<root>
<dad>
<kid> wee </kid>
</dad>
</root>
My goal is to replace <dad> by <mom> but keeping the kid information.
Ive tryed
xml.XPathSelectElements("dad")
then looping over and
dad.ReplaceWith(new XElement("mom", dad.descendants());
but it doesnt work :(
Any ideas on how to do this ?
It looks like you want to rename the element 'dad' to 'mom':
xml.Root.Elements("dad").ToList().ForEach(d => d.Name = "mom");
If 'mom' is an existing element with its own elements and attributes i would replace the 'dad'-element and add the 'kid'-element to the 'mom' element:
xml.Root.Elements("dad").ToList().ForEach(d =>
{
XElement mom = new XElement("mom"); //use your mom here
mom.Add(d.Descendants());
d.ReplaceWith(mom);
});
Related
I have the following xml part and am trying to extract the value where key is known. The example below is a snippet, from a larger xml that contains 1000's of nodes.
<?xml version="1.0" encoding="utf-8"?>
<DictionarySerializer>
<item>
<key>key1</key>
<value>CONTENT1</value>
</item>
<item>
<key>key2</key>
<value>CONTENT2</value>
</item>
</DictionarySerializer>
i assume the above is a string called xml,
then with
XDocument.Parse(xml)
.Descendants("key")
.Where(x => (string)x.Value == "key1")
.FirstOrDefault().NextNode.ToString()
I can get the string <value>CONTENT1</value> But i simply cannot get my head around how to get the value of the value node to to say.
I am afrad it is super simple, and i just are stuck in a coffein loop :-)
XDocument.Parse(xml)
.Descendants("key")
.Where(x => (string)x.Value == "key1")
.FirstOrDefault().Value.ToString()
you should use .Value property instead of .NextNode
If you want to get all keys and values from the XML from all 1000 elemnts. You can use:
Dictionary<string, string> elements = new Dictionary<string, string>();
xml.Root.Elements().ToList().ForEach(xmlElement =>
{
elements.Add(xmlElement.Descendants("key").First().Value,
xmlElement.Descendants("value").First().Value);
});
So, the elements dictionary will contain all of your 1000 nodes.
Try to cast NextNode to XElement and get Value from it.
Considering you can use XPath expressions.
expression = #"//Item[Key='1']/Value"
XmlNodeList nodeList = xmlDocument.SelectNodes(expression);
This would give you the value node(s) of items with Key=1. Just find the value of the desired node.
I believe using XDocument you can also try,
string output = xDocument.XPathEvaluate(expression);
I have an XML file that looks like this -
<SST_SignageCompConfig>
<Items>
<Item>
<Index>0</Index>
<Type>1</Type>
<Duration>7</Duration>
<Name>Branding-Colours-for-business.jpg</Name>
</Item>
<Item>
<Index>1</Index>
<Type>1</Type>
<Duration>7</Duration>
<Name>Flower of Life Meditation - Copy.png</Name>
</Item>
</Items>
</SST_SignageCompConfig>
I need to count how many Item Elements there are within the Items Element.
ie how many images there are.
I'm using XDocument, so my XML file is loaded like this -
string configurationPath = System.IO.Path.Combine("C:\\SST Software\\DSS\\Compilations\\" + compName + #"\\Comp.cfg");
XDocument filedoc = XDocument.Load(configurationPath);
I've tried numerous variations of the following, with all returning a null object reference exception
foreach (var item in filedoc.Element("SST_SignageCompConfig").Element("Items").Element("Item").Nodes())
{
string name = filedoc.Element("SST_SignageCompConfig").Element("Items").Element("Item").Attribute("Name").ToString();
files.Append(name + "|");
}
I've found countless examples of how to count how many different child elements are within an element, but I need to know how many instances of the same element exist.
Can anyone point me in the right direction?
You can select all names like so:
var names = from item in filedoc.Descendants("Item")
select (string)item.Element("Name");
Or without the query syntax:
var names = filedoc.Descendants("Item").Elements("Name").Select(e => e.Value);
You can get only unique names by:
var uniqueNames = names.Distinct();
You're on the right track. Try finding out exactly which invocation is giving you the NullReferenceException. My guess is that it's the attempt to find:
.Element("SST_SignageCompConfig")
Which is your root. Try the following instead:
// note the difference between .Element and .Elements
var count = filedoc.Root.Element("Items").Elements("Item").Count();
You could also use XPath to help you nail down the navigation within your XDocument:
// returns the current top level element
var element = filedoc.Root.XPathSelectElement(".");
// If the returned element is "SST_SignageCompConfig", then:
var nextElement = filedoc.Root.XPathSelectElement("./Items")
// If the "." element is *not* "SST_SignageCompConfig", then try and locate where in your XML document that node is.
// You can navigate up with .Parent and down with .Element(s)
And so on.
How about:
var nav = fileDoc.CreateNavigator();
XPathNodeIterator navShape = nav.Select("/SST_SignageCompConfig/Items");
navShape.MoveNext()
var count = navShape.Count;
If your xml has only one Items element, this should do the trick:
filedoc.Descendants("Item")
.GroupBy(e => e.Element("Name")!=null? e.Element("Name").Value:String.Empty)
.Select(g => new
{
Name = g.Key,
Count = g.Count()
});
Because "Name" is an element and not an attribute of your xml structure.
can you try replacing this?
string name = filedoc.Element("SST_SignageCompConfig").Element("Items").Element("Item").Element("Name").ToString();
I trying to figure out a solution for a tiny problem I have, but I didn't have much success in last two days. I've went through many posts here but I failed to find an adequate solution for myself. I know it's probably basic question for you guys, but it seems like I've lost focus and can think clearly about this issue.
So, this is the issue. I have a sample XML below, with the structure I need. What I want is to read this XML, go to the event I want and than read/ store all test elements.
<Config>
<Events>
<Event_1>
<NameOfEvent>SomeName:</NameOfEvent>
<test id="test001">
<xpath>"some xpath"</xpath>
<value>someValue1</value>
<tagName>none</tagName>
</test>
<test id="test002">
<xpath>"some xpath"</xpath>
<value>someValue2</value>
<tagName>none1</tagName>
</test>
<test id="test003">
<xpath>"some xpath"</xpath>
<value>someValue3</value>
<tagName>none2</tagName>
</test>
</Event_1>
</Events>
</Config>
What I`ve done so far is this:
string EventCode="Event_1";
var doc= XDocument.Load(#"C:\new\test\testConfig.xml");
var result = from y in doc.Descendants(EventCode).
Where(y =>(string)y.Element("path").Attribute("id")=="test001"
{
NameOfEvent = y.Element("NameOfEvent").Value,
xpath= y.Element("test").Element("xpath").Value
value =y.Element("test").Element("value").Value,
tag =y.Element("test").Element("tagName").Value
};
Than, I want to use foreach loop, to access all test elements. But, I`m only able to access chiled nodes of first element test.
Can you help with this? Thanks a lot in advance!!!
Assuming your XML has no specific namespaces
var evt = (from el in doc.Descendants("test")
where el.Parent.Name == "Event_1"
group el by el.Parent.Element("NameOfEvent").Value into g
select new {
Name = g.Key,
Tests = g.Select(x => new {
XPath = x.Element("xpath").Value,
Value = x.Element("value").Value,
TagName = x.Element("tagName").Value
})
}).FirstOrDefault();
Console.WriteLine("Event name: " + evt.Name);
foreach (var test in evt.Tests)
{
Console.WriteLine(test.XPath);
Console.WriteLine(test.Value);
Console.WriteLine(test.TagName);
}
Live demo
My '.xml' file looks this way:
<?xml version="1.0" encoding="utf-8"?>
<Requestes>
<Single_Request num="1">
<numRequest>1</numRequest>
<IDWork>1</IDWork>
<NumObject>1</NumObject>
<lvlPriority>Высокий</lvlPriority>
</Single_Request>
<Single_Request num="2">
<numRequest>2</numRequest>
<IDWork>2</IDWork>
<NumObject>2</NumObject>
<lvlPriority>Средний</lvlPriority>
</Single_Request>
<Periodic_Request num="1">
<numRequest>3</numRequest>
<IDWork>23</IDWork>
<pFrequency>23</pFrequency>
<lvlPriority>Низкий</lvlPriority>
<time_service>23</time_service>
<time_last_service>23</time_last_service>
<relative_time>23</relative_time>
</Periodic_Request>
</Requestes>
So I need to delete Single_Request with atribute value equal to sTxtBlock_numRequest.Text. I have tried to do it this way:
XDocument doc = XDocument.Load(FilePath);
IEnumerable<XElement> sRequest = doc.Root.Descendants("Single_Request").Where(
t => t.Attribute("num").Value =="sTxtBlock_numRequest.Text"); //I'm sure, that problem is here
sRequest.Remove();
doc.Save(FilePath);
Unfortunattly, nothing has happanned, don`t know how to solve the problem.
This is why , I am looking forward to your help.
You are comparing attribute value with string literal "sTxtBlock_numRequest.Text". You should pass value of textbox text instead:
doc.Root.Elements("Single_Request")
.Where(t => (string)t.Attribute("num") == sTxtBlock_numRequest.Text)
.Remove();
Note - it's better to use Elements when you are getting Single_Request elements of root, because Descendants will search whole tree, instead of looking at direct children only. Also you can call Remove() without saving query to local variable.
I’m trying to use Linq XML to select a number of nodes and the children but getting terrible confused!
In the example XML below I need to pull out all the <MostWanted> and all the Wanted with their child nodes but without the other nodes in between the Mostwanted and Wanted nodes.
This because each MostWanted can be followed by any number of Wanted and the Wanted relate to the preceding Mostwanted.
I’m even confusing myself typing this up!!!
How can I do this in C#??
<root>
<top>
<NotWanted3>
</NotWanted3>
<MostWanted>
<UniqueKey>1</UniqueKey>
<QuoteNum>1</QuoteNum>
</MostWanted>
<NotWanted2>
<UniqueKey>1</UniqueKey>
<QuoteNum>1</QuoteNum>
</NotWanted2>
<NotWanted1>
<UniqueKey>0001</UniqueKey>
</NotWanted1>
<Wanted>
<Seg>
<SegNum>1</SegNum>
</Seg>
</Wanted>
<Wanted>
<Seg>
<SegNum>2</SegNum>
</Seg>
</Wanted>
<NotWanted>
<V>x</V>
</NotWanted>
<NotWanted3>
</NotWanted3>
<MostWanted>
<UniqueKey>1</UniqueKey>
<QuoteNum>1</QuoteNum>
</MostWanted>
<NotWanted2>
<UniqueKey>1</UniqueKey>
<QuoteNum>1</QuoteNum>
</NotWanted2>
<NotWanted1>
<UniqueKey>0002</UniqueKey>
</NotWanted1>
<Wanted>
<Seg>
<SegNum>3</SegNum>
</Seg>
</Wanted>
<Wanted>
<Seg>
<SegNum>4</SegNum>
</Seg>
</Wanted>
<NotWanted>
<V>x</V>
</NotWanted>
</top>
</root>
Why don't you just use:
XName wanted = "Wanted";
XName mostWanted = "MostWanted";
var nodes = doc.Descendants()
.Where(x => x.Name == wanted || x.Name == mostWanted);
That will retrieve every element called "Wanted" or "MostWanted". From each of those elements you can get to the child elements etc.
If this isn't what you're after, please clarify your question.