I know I can do this iteratively, but it would be cool to do it in a single LINQ statement.
I have some XML that looks like this:
<parent name="george">
<child name="steve" age="10" />
<child name="sue" age="3" />
<pet type="dog" />
<child name="jill" age="7" />
</parent>
<!-- ... -->
and I want to write a LINQ to XML statement to turn it into
<node type="parent" label="george">
<node type="child" label="steve" years="10 />
<node type="child" label="sue" years="3" />
<node type="child" label="jill" years="7" />
<!-- no pets! -->
</parent>
<!-- ... -->
Is that possible in a single LINQ to XML statement?
I've included two from statements in a LINQ statement before, but not a second select, which seems to be what this would require.
You'll need to query the desired elements and create new elements and attributes using the queried items. Something like this should work:
var input = #"<root>
<parent name=""george"">
<child name=""steve"" age=""10"" />
<child name=""sue"" age=""3"" />
<pet type=""dog"" />
<child name=""jill"" age=""7"" />
</parent>
</root>";
var xml = XElement.Parse(input);
var query = from p in xml.Elements("parent")
select new XElement("node",
new XAttribute("type", p.Name),
new XAttribute("label", p.Attribute("name").Value),
from c in p.Elements("child")
select new XElement("node",
new XAttribute("type", c.Name),
new XAttribute("label", c.Attribute("name").Value),
new XAttribute("years", c.Attribute("age").Value)));
Quick and dirty:
doc.Elements("parent")
.Select(p =>
new XElement("node",
new XAttribute("type", p.Name),
new XAttribute("label", p.Attribute("name") != null ? p.Attribute("name").Value : ""),
p.Elements("child")
.Select(c =>
new XElement("node",
new XAttribute("type", c.Name),
new XAttribute("label", c.Attribute("name") != null ? c.Attribute("name").Value : ""),
new XAttribute("years", c.Attribute("age") != null ? c.Attribute("age").Value : ""))
)
)
);
Related
I have an XML in this Format and I want to get List of Line ID and its Name
<ArrayOfLines xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<LineStatus ID="0" StatusDetails="">
<BranchDisruptions />
<Line ID="1" Name="Line1" />
<Status ID="GS" CssClass="GoodService" Description="Good Service" IsActive="true">
<StatusType ID="1" Description="Line" />
</Status>
</LineStatus>
<LineStatus ID="1" StatusDetails="">
<BranchDisruptions />
<Line ID="2" Name="Line2" />
<Status ID="GS" CssClass="GoodService" Description="Good Service" IsActive="true">
<StatusType ID="1" Description="Line" />
</Status>
</LineStatus>
</ArrayOfLines>
and This is the code I have written:
String xmlFilePath = #"C:/myXML.xml";
XDocument xmlFile = XDocument.Load(xmlFilePath);
var query = from c in xmlFile.Descendants("LineStatus") select c;
but it is not returning me any results.
Here is my idea but you have to create list "namesList" and "idList" before. Try this:
XDocument xDoc = XDocument.Load("your xml file");
foreach (var elem in xDoc.Document.Descendants("line"))
{
idList.Add(elem.Attribute("ID").Value);
namesList.Add(elem.Attribute("Name").Value);
}
And you have full controll by index of each list to this data. After that you can also create object of these 2 elements
You have an xml namespace, you need to specify it with element names:
XNamespace ns = "http://www.w3.org/2001/XMLSchema-instance";
var query = from c in xmlFile.Descendants(ns + "LineStatus") select c;
Try this...
String xmlFilePath = #"C:/myXML.xml";
XDocument xmlFile = XDocument.Load(xmlFilePath);
var query = (from c in xmlFile.Descendants("Line")
select new {
ID=c.Attribute("ID").Value,
Name=c.Attribute("Name").Value
}).ToList();;
I have the following xml node
<group>
<level id="1" name="Level 1" />
<level id="2" name="Level 2" />
</group>
How can insert new element with it's attributes to xml file
var doc = XDocument.Load("yourxmlfile.xml");
var x = new XElement("level",
new XAttribute("id", 3),
new XAttribute("name", "Level 3"));
doc.Element("group").Add(x);
doc.Save("yourxmlfile.xml");
I have a Xml and i have to get the element name
<Data>
<Test key="G" modifier="control" />
<Test1 key="E" modifier="control" />
<Test3 />
<Test4 />
</Data>
XDocument xd = XDocument.Load("..\\Cmd.xml");
IEnumerable<XElement> xeCmdData = Cmd.XPathSelectElements(".//Data");
foreach (XElement xeData in xeCmdData)
{
// here i am getting the whole xml how to get Element name ...
// Like <Data>
// <Test key="G" modifier="control" />
// <Test1 key="E" modifier="control" />
// <Test3 />
// <Test4 />
// </Data>
}
How to get Element names ?
XDocument xd = XDocument.Load("..\\Cmd.xml");
IEnumerable<string> names = xd.XPathSelectElements("//Data/*")
.Select(e => e.Name.LocalName);
Or without XPath
IEnumerable<string> names = xd.Descendants("Data")
.Elements()
.Select(e => e.Name.LocalName);
Result:
Test
Test1
Test3
Test4
This is the XML file which I have:
<Root>
<Level1>
<Foo ID="1" Count="20" />
<Foo ID="2" Count="28" />
<Foo ID="3" Count="25" />
</Level1>
</Root>
I only have one Level 1 element in my XML, and inside of it there several Foo nodes.
How can I get that Foo nodes in a dictionary?
I mean Dictionary<int, int>.
var doc = XDocument.Load(fileName);
var dictionary =
doc.Root
.Element("Level1")
.Elements("Foo")
.ToDictionary(
e => (int)e.Attribute("Id"),
e => (int)e.Attribute("Count"));
XElement.Parse("XML here").Descendants("Foo").Select( s => s).ToDictionary( x=> x.Attribute("ID").Value, x=> x.Attribute("Count").Value))
I've an xml file "Sample.xml"
<RootElement>
<Children>
<Child Name="FirstChild" Start="0" End="2">
<Sibling Name="Test1" />
<Sibling Name="Test2" />
<AdditionalSibling Name="Add_Test_1" />
<AdditionalSibling Name="Add_Test_2" />
<MissingSibling Name="Miss_Test_1" />
<MissingSibling Name="Miss_Test_2" /
</Child>
<Child Name="SecondChild" Start="0" End="2">
<Sibling Name="Test3" />
<Sibling Name="Test4" />
</Child>
<Child Name="ThirdChild" Start="0" End="2">
<Sibling Name="Test5" />
<Sibling Name="Test6" />
</Child>
<Child Name="FourthChild" Start="0" End="2">
<Sibling Name="Test7" />
<Sibling Name="Test8" />
</Child>
<Child Name="FifthChild" Start="0" End="2">
<Sibling Name="Test9" />
<Sibling Name="Test10" />
</Child>
<Child Name="SixthChild" Start="0" End="2">
<Sibling Name="Test11" />
<Sibling Name="Test12" />
</Child>
<MatchedChilds>
<Child Name="FirstChild" />
<Child Name="SecondChild" />
<Child Name="ThirdChild" />
<Child Name="FourthChild" />
<Child Name="FifthChild" />
<Child Name="SixthChild" />
</MatchedChilds>
</Children>
</RootElement>
And a Class "SampleClass"
public class SampleClass
{
string Start;
string End;
List<string> Siblings;
List<string> AdditionalSiblings;
List<string> MissingSiblings;
public SampleClass()
{
Start= "";
End = "";
Siblings = new List<string>();
AdditionalSiblings = new List<string>();
MissingSiblings = new List<string>();
}
public SampleClass( string St, string En,List<string> S, List<string> AS, List<string> MS)
{
Start= St;
End = En;
Siblings = S;
AdditionalSiblings = AS;
MissingSiblings = MS;
}
}
and in another class i've declared a Dictonary Like
Dictionary<string, SampleClass> m_dictSample = new Dictionary<string, SampleClass>();
i need to fill this dictonary with the contents of the file ..
I'm using Xml Linq for this..
XDocument l_XDOC = XDocument.Load(Application.StartupPath + "\\Sample.xml");
m_dictSample = (from element in l_XDOC.Descendants("Child")
group element by element.Attribute("Name").Value into KeyGroup
select KeyGroup )
.ToDictionary(grp => grp.Key,
grp => new
SampleClass(grp.Attributes("Start").ToList()[0].Value.ToString(),
grp.Attributes("End").ToList()[0].Value.ToString(),
grp.Descendants("Sibling").Attributes("Name").Select(l_Temp => l_Temp.Value).ToList(),
grp.Descendants("AdditionalSibling").Attributes("Name").Select(l_Temp => l_Temp.Value).ToList(),
grp.Descendants("MissingSibling").Attributes("Name").Select(l_Temp => l_Temp.Value).ToList()));
This query is working properly for the above described file.
But if the file have more than one Element with same name, or an element with no "start" and "end" attribute make an exception while
executing the query.
I've problem with the following lines
grp.Attributes("Start").ToList()[0].Value.ToString(),
grp.Attributes("End").ToList()[0].Value.ToString()
please give me a better way to do this
And i need to fill a listView with the contents of the Dictonary like
S.no Child Siblings Additional Siblings Missing Siblings
1 FirstChild Test1,Test2 Add_Test_1,Add_Test_2 Miss_Test_1,Miss_Test_2
2 SecondChild Test3,Test4
3 ThirdChild Test5,Test6
now i'm using for loop for this
please give me a better way to do this..
You can't use a Dictionary you have to use a Lookup collection
Dictionaries require that each key has a 1-1 mapping to a unique value.
What you're looking for is a Lookup collection.
See this for more info.
Given the way that you have written your query I don't see why you'd be getting an exception if you had two Child elements with the same name. If anything their data would just get combined into a single key instance in your dictionary. To fix the exception you receive when a Start attribute doesn't exist just do a conditional operator test ? : to see if results were returned from your attribute query. That said the below code should work for you with the disclaimer that just because this works doesn't mean it's best practice. In many ways I am a LINQ neophyte myself.
Dictionary<string, SampleClass> dict =
(from element in xDoc.Descendants("Child")
group element by element.Attribute("Name").Value
into kGrp
select kGrp)
.ToDictionary(grp => grp.Key,
grp => new SampleClass
{
Start = grp.Attributes("Start").Count() > 0
? grp.Attributes("Start")
.ToList()[0].Value.ToString()
: String.Empty
,End = grp.Attributes("End").Count() > 0
? grp.Attributes("End")
.ToList()[0].Value.ToString()
: String.Empty
,Siblings =
grp.Descendants("Sibling")
.Attributes("Name")
.Select(l_Temp => l_Temp.Value).ToList()
,AdditionalSiblings =
grp.Descendants("AdditionalSibling")
.Attributes("Name")
.Select(l_Temp => l_Temp.Value).ToList()
,MissingSiblings =
grp.Descendants("MissingSibling")
.Attributes("Name")
.Select(l_Temp => l_Temp.Value).ToList()
});