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Load XML containing multiple lists to multiple DataTables

I have an XML that has the below structure:
<?xml version="1.0" encoding="utf-8"?>
<n0:Response xmlns:n0="urn:sap-com:document:sap:rfc:functions">
<Cars>
<item>
<ID>1</ID>
<TYPE>SUV</TYPE>
<YEAR>2022</YEAR>
</item>
<item>
<ID>2</ID>
<TYPE>Convertible</TYPE>
<YEAR>2021</YEAR>
</item>
</Cars>
<Employees>
<item>
<ID>1</ID>
<NAME>John</NAME>
<STATUS>1</STATUS>
<PHONE>000000000</PHONE>
</item>
<item>
<ID>2</ID>
<NAME>Sam</NAME>
<STATUS>2</STATUS>
<PHONE>000000000</PHONE>
</item>
<item>
<ID>3</ID>
<NAME>Jane</NAME>
<STATUS>1</STATUS>
<PHONE>000000000</PHONE>
</item>
</Employees>
</n0:Response>
(this is just a sample, the final file will have more than 10k items per row)
I need to load that file to two DataTables, each having the correct values.
I do this by creating DataSet, loading XML, and filtering the data table.
My DataSet has 3 tables:
but when I try to access the correct data table I get all the items instead of the correct ones (I get items from the entire XML):
var rel = ds.Relations.OfType<DataRelation>()
.FirstOrDefault(x => x.ParentTable.TableName == "Cars")?.ChildTable;
this is the result:
I managed to filter the data by adding a Select statement like below:
var ds = new DataSet();
using Stream stream = new FileStream("Sample.xml", FileMode.Open, FileAccess.Read);
ds.ReadXml(stream);
var table1 = ds.Relations.OfType<DataRelation>()
.FirstOrDefault(x => x.ParentTable.TableName == "Cars")?
.ChildTable.Select("Cars_Id = 0").CopyToDataTable();
var table2 = ds.Relations.OfType<DataRelation>()
.FirstOrDefault(x => x.ParentTable.TableName == "Employees")?
.ChildTable.Select("Employees_Id = 0").CopyToDataTable();
but this isn't generic and I'd like to be able to access the correct DataTable only by name (the node name from XML).
My question is similar to How to get multiple tables in Dataset from XML, but the provided answer didn't solve the issue.

Intersect 2 Xml Files with XDocument in C#

I have 2 XML Files and I want to get all the XNodes , which are in both files, only based on their same Attribute "id".
This is how an XML File looks like:
<parameters>
<item id="57">
<länge>8</länge>
<wert>0</wert>
</item>
<item id="4">
<länge>8</länge>
<wert>0</wert>
</item>
<item id="60">
<länge>8</länge>
<wert>0</wert>
</item>
</parameters>
Given a second XML File which looks like this:
<parameters>
<item id="57">
<länge>16</länge>
<wert>10</wert>
</item>
<item id="144">
<länge>16</länge>
<wert>10</wert>
</item>
</parameters>
Now I only want the XNode with the ID=57, since it is available in both files. So the output should look like this:
<item id="57">
<länge>8</länge>
<wert>0</wert>
</item>
I already did intersect both files like this:
aDoc = XDocument.Load(file);
bDoc = XDocument.Load(tmpFile);
intersectionOfFiles = aDoc.Descendants("item")
.Cast<XNode>()
.Intersect(bDoc.Descendants("item")
.Cast<XNode>(), new XNodeEqualityComparer());
This only seems to work, when all the descendant Nodes are the same. If some value is different, it won't work. But I need to get this to work on the same Attributes, the values or the descendants doesn't matter.
I also tried to get to the Attributes and intersect them, but this didn't work either:
intersectionOfFiles = tmpDoc
.Descendants(XName.Get("item"))
.Attributes()
.ToList()
.Intersect(fileDoc.Descendants(XName.Get("item")).Attributes()).ToList();
Am I missing something or is this a completely wrong approach?
Thanks in advance.

You should create your own IEqualityComparer that compares XML attributes you want:
public class EqualityComparerItem : IEqualityComparer<XElement>
{
public bool Equals(XElement x, XElement y)
{
return x.Attribute("id").Value == y.Attribute("id").Value;
}
public int GetHashCode(XElement obj)
{
return obj.Attribute("id").Value.GetHashCode();
}
}
which you would then pass to XML parsing code:
var intersectionOfFiles = aDoc.Root
.Elements("item")
.Intersect(
bDoc.Root
.Elements("item"), new EqualityComparerItem());
I also changed some parts of your XML parsing code (XElement instead of XNode since "item" is XML element and "id" is XML attribute).

xml XPathSelectElements => to string type

I have the following XML structure:
<?xml version="1.0" encoding="utf-8"?>
<xml>
<root>
<Item>
<taxids>
<string>330</string>
<string>374</string>
<string>723</string>
<string>1087</string>
<string>1118</string>
<string>1121</string>
</taxids>
</Item>
</root>
</xml>
I need to get all the string nodes from the xml file to a string variable, like this:
var query = from ip in doc.XPathSelectElements("xml/root/Item")
where ip.XPathSelectElement("taxid").Value == "723"
select ip.XPathSelectElements("taxids").ToString();
But I am getting the following in one row of the variable query:
"System.Xml.XPath.XPathEvaluator+<EvaluateIterator>d__0`1[System.Xml.Linq.XElement]"
I want to get a string like this:
<taxids><string>330</string><string>374</string><string>723</string><string>1087</string><string>1118</string><string>1121</string></taxids>
Is this possible?
Thanks!

I would suggest you something like:
var values = from ids in doc.XPathSelectElements("/xml/root/Item/taxids")
from id in ids.XPathSelectElements("string")
where id.Value.Contains("723")
select ids.ToString();
var result = string.Join("", values);
The value variable will contain all the taxids, which have at least one string child with value 723.
Another variant, which doesn't use XPath for the children checking:
var values = from ids in doc.XPathSelectElements("/xml/root/Item/taxids")
from id in ids.Elements("string")
where id.Value.Contains("723")
select ids.ToString();
var result = string.Join("\n", values);

var doc = XDocument.Parse(#"<?xml version=""1.0"" encoding=""utf-8""?>
<xml>
<root>
<Item>
<taxids>
<string>330</string>
<string>374</string>
<string>723</string>
<string>1087</string>
<string>1118</string>
<string>1121</string>
</taxids>
</Item>
</root>
</xml>");
var query = doc.XPathSelectElement("xml/root/Item/taxids");
Console.WriteLine(query);

How to put a node in a dictionary using LINQ to XML

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))

How to use LINQ to XML to retrieve nested arrays?

Here's a sample of the XML I want to read:
<?xml version="1.0" encoding="UTF-8"?>
<hash>
<result>
<properties type="array">
<property>
<registers type="array">
<register>
<dials type="integer">6</dials>
</register>
<register>
<dials type="integer">6</dials>
</register>
</registers>
<unit-balance type="integer">-104</unit-balance>
</property>
</properties>
<account-number>9001234</account-number>
</result>
<version>1.0</version>
</hash>
I can read the first level with the following code, but how to get the registers, and have them associated with the corresponding property?
var rawProperties = from property in customerXml.Descendants("property")
select new
{
UnitBalance = property.Element("unit-balance").Value
};

Something like this:
var rawProperties = customerXml.Descendants("property")
.Select(arg =>
new
{
UnitBalance = arg.Element("unit-balance").Value,
Registers = arg.Descendants("dials").Select(x => x.Value).ToList()
})
.ToList();