Insert data from C# to XML with using Linq issue?

Insert data from C# to XML with using Linq issue? - c#

I am building a C# application. I want to insert the following XML data to XML.
<?xml version="1.0" encoding="utf-8"?>
<Employees>
<Employee ID="1">
<Name>Numeri</Name>
</Employee>
<Employee ID="2">
<Name>Ismail</Name>
</Employee>
<Employee ID="3">
<Name>jemu</Name>
</Employee>
</Employees>
Previously I have tried an XML that has not attribute value, But now I
want to insert with attribute value.
string _file = (Application.StartupPath+"/employees.xml");
XDocument doc;
if (!File.Exists(_file))
{
doc = new XDocument();
doc.Add(new XElement("Employees"));
}
else
{
doc = XDocument.Load(_file);
}
doc.Root.Add(
new XElement("Employee",
new XElement("ID", textBox1.Text),
new XElement("Name", textBox2.Text)
)
);
doc.Save(_file);

You should use XAttribute instead of XElement in order to insert ID as attribute:
doc.Root.Add(
new XElement("Employee",
new XAttribute("ID", textBox1.Text),
new XElement("Name", textBox2.Text)
)
);

Related

XML XElement building an xml document

Hi I am new to XML building, I basically didn't use it before, I always preferred json.
I have a solution where I just make it with string and convert to XML object, but how can I do it with XElement class?
This is the document:
<?xml version="1.0" encoding="utf-8"?>
<requestblock version="3.67">
<alias>ALIAS</alias>
<request type="AUTH">
<operation>
<sitereference>test12345</sitereference>
<accounttypedescription>TEST</accounttypedescription>
<parenttransactionreference>12-3-4567</parenttransactionreference>
</operation>
<merchant>
<orderreference>Example recurring auth</orderreference>
</merchant>
<customer> </customer>
<billing>
<amount currencycode="GBP">1234</amount>
<subscription type="TEST">
<number>1</number>
</subscription>
</billing>
<settlement/>
</request>
</requestblock>
I already have a part of the code like this:
XElement address =
new XElement("alias", "TEST",
new XElement("request", new XAttribute("type", "AUTH"),
new XElement("City", "Mercer Island"),
new XElement("State", "WA"),
new XElement("Postal", "68042")
));
But I have a problem with alias, because alias is closed after all elements, not in the same notation:
<alias>TEST
<request type="AUTH">
<City>Mercer Island</City>
<State>WA</State>
<Postal>68042</Postal>
</request>
</alias>
As you can see notation is the problem.

You're setting alias as your root element, which should be requestblock. If you start with requestblock like this:
XElement address =
new XElement("requestblock", new XAttribute("version",3.67),
new XElement("alias", "TEST"),
new XElement("request", new XAttribute("type", "AUTH"),
new XElement("City", "Mercer Island"),
new XElement("State", "WA"),
new XElement("Postal", "68042")
It'l give you
<requestblock version="3.67">
<alias>TEST</alias>
<request type="AUTH">
<City>Mercer Island</City>
<State>WA</State>
<Postal>68042</Postal>
</request>
</requestblock>

Write to end of XML with LINQ to XML

I'm using the following code to write an XML file to disk. If I change the values for each field and re-run the code, the values saved will simply be replaced.
I've looked around here but I see no way to automatically append the new values to the end of the file as a new element and not simply replace everything.
XNamespace empNM = "urn:lst-emp:emp";
XDocument xDoc = new XDocument(
new XDeclaration("1.0", "UTF-16", null),
new XElement(empNM + "Employees",
new XElement("Employee",
new XComment("Only 3 elements for demo purposes"),
new XElement("EmpId", "5"),
new XElement("Name", "Kimmy"),
new XElement("Sex", "Female")
)));
StringWriter sw = new StringWriter();
XmlWriter xWrite = XmlWriter.Create(sw);
xDoc.Save(xWrite);
xWrite.Close();
// Save to Disk
xDoc.Save("C:\\tempFolder\\test.xml");
Console.WriteLine("Saved");
Also, could someone please explain what "urn:lst-emp:emp"; in the first line does.

void Main()
{
XNamespace empNM = "urn:lst-emp:emp";
XDocument xDoc ;
string path="C:\\tempFolder\\test.xml";
if(!File.Exists(path))
{
xDoc = new XDocument(
new XDeclaration("1.0", "UTF-16", null),
new XElement(empNM + "Employees")
);
}
else
{
xDoc=XDocument.Load(path);
}
var element=new XElement("Employee",
new XComment("Only 3 elements for demo purposes"),
new XElement("EmpId", "5"),
new XElement("Name", "Kimmy"),
new XElement("Sex", "Female"));
xDoc.Element(empNM+"Employees").Add(element);
// Save to Disk
xDoc.Save(path);
Console.WriteLine("Saved");
}
Here is the Xml generated:
<?xml version="1.0" encoding="utf-16"?>
<Employees xmlns="urn:lst-emp:emp">
<Employee xmlns="">
<!--Only 3 elements for demo purposes-->
<EmpId>5</EmpId>
<Name>Kimmy</Name>
<Sex>Female</Sex>
</Employee>
<Employee xmlns="">
<!--Only 3 elements for demo purposes-->
<EmpId>5</EmpId>
<Name>Kimmy</Name>
<Sex>Female</Sex>
</Employee>
</Employees>

Accessing xml elements using LINQ to XML

I have a xml document like this and I need to access the "employees", "employee" elements so I am trying to use linq's XDocument class to get the employee elements but it always returns empty value.
Sample xml:
<organization>
<metadata>
</metadata>
<main>
<otherInfo>
</otherInfo>
<employeeInfo>
<employees>
<employee>
<id>1</id>
<name>ABC</name>
</employee>
<employee>
<id>2</id>
<name>ASE</name>
</employee>
<employee>
<id>3</id>
<name>XYZ</name>
</employee>
</employees>
</employeeInfo>
</main>
</organization>
C# code:
XDocument xDoc = XDocument.Parse(xmlString);
var allEmployees = from d in xDoc.Descendants("employeeInfo")
from ms in d.Elements("employees")
from m in ms.Elements("employee")
select m;

It kind of depends on what information you need. Your select returns an IEnumerable list.
This code will print out each employee
string xmlString = #"<organization>
<metadata>
</metadata>
<main>
<otherInfo>
</otherInfo>
<employeeInfo>
<employees>
<employee>
<id>1</id>
<name>ABC</name>
</employee>
<employee>
<id>2</id>
<name>ASE</name>
</employee>
<employee>
<id>3</id>
<name>XYZ</name>
</employee>
</employees>
</employeeInfo>
</main>
</organization>";
XDocument xDoc = XDocument.Parse(xmlString);
var allEmployees = from d in xDoc.Descendants("employeeInfo")
from ms in d.Elements("employees")
from m in ms.Elements("employee")
select m;
foreach (var emp in allEmployees) {
Console.WriteLine(emp);
}
Console.Read();

XDocument xDoc = XDocument.Parse(xmlString);
var allEmployees = (from r in xDoc.Descendants("employee")
select new
{
Id = r.Element("id").Value,
Name = r.Element("name").Value
}).ToList();
foreach (var r in allEmployees)
{
Console.WriteLine(r.Id + " " + r.Name);
}

Just use Descendants("Employee");
XDocument xDoc = XDocument.Parse(xmlString);
var allEmployees = xDoc.Descendants("employee").ToList();

XML Name Space Not Formating Correctly

Building an XML XDocument to push to web service and the root element needs namespace values this is what the XML form should look like....
<shipment-feed xmlns="http://seller.marketplace.sears.com/oms/v5"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://seller.marketplace.sears.com/oms/v5 asn.xsd ">
<shipment>
<header>
<asn-number>00601780002</asn-number>
<po-number>0060180</po-number>
<po-date>2009-09-26</po-date>
</header>
<detail>
<tracking-number>UPS1XXX</tracking-number>
<ship-date>2001-01-01</ship-date>
<shipping-carrier>UPS</shipping-carrier>
<shipping-method>GROUND</shipping-method>
<package-detail>
<line-number>1</line-number>
<item-id>AB12345678912345456789123456789CD</item-id>
<quantity>1</quantity>
</package-detail>
</detail>
</shipment>
</shipment-feed>
This is the xml that I'm getting....
<?xml version="1.0" encoding="utf-8"?>
<shipment-feed xmlns="http://seller.marketplace.sears.com/oms/v5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsischemalocation="http://seller.marketplace.sears.com/oms/v5 asn.xsd">
<shipment xmlns="">
<header>
<asn-number>2824565201311</asn-number>
<po-number>2824565</po-number>
<po-date>2013-11-14</po-date>
</header>
<details>
<tracking-number>579040914892</tracking-number>
<ship-date>2013-11-14</ship-date>
<shipping-carrier>FEDEX</shipping-carrier>
<shipping-method>Ground</shipping-method>
<package-details>
<line-number>1</line-number>
<item-id>LTH7XB1MW-EA</item-id>
<quantity>3</quantity>
</package-details>
</details>
</shipment>
<shipment xmlns="">
<header>
<asn-number>2821596201311</asn-number>
<po-number>2821596</po-number>
<po-date>2013-11-13</po-date>
</header>
<details>
<tracking-number>9405515901119923380663</tracking-number>
<ship-date>2013-11-14</ship-date>
<shipping-carrier>USPS</shipping-carrier>
<shipping-method>Priority Mail</shipping-method>
<package-details>
<line-number>1</line-number>
<item-id>CWD93151-EA</item-id>
<quantity>6</quantity>
</package-details>
<package-details>
<line-number>2</line-number>
<item-id>CWD93901-EA</item-id>
<quantity>4</quantity>
</package-details>
</details>
</shipment>
</shipment-feed>
This is the C# code I created....
XNamespace ns1 = "http://seller.marketplace.sears.com/oms/v5";
XNamespace ns2 = "http://www.w3.org/2001/XMLSchema-instance";
XNamespace ns3 = "http://seller.marketplace.sears.com/oms/v5 asn.xsd";
XDocument doc = new XDocument();
XElement root = new XElement(ns1 + "shipment-feed",
new XAttribute("xmlns" , "http://seller.marketplace.sears.com/oms/v5"),
new XAttribute(XNamespace.Xmlns + "xsi", "http://www.w3.org/2001/XMLSchema-instance"),
new XAttribute("xsi" + "schemalocation", "http://seller.marketplace.sears.com/oms/v5 asn.xsd"));
doc.Add(root);
int x = 1;
foreach (SearsOrder s in SearsList)
{
XElement shipment = new XElement("shipment",
new XElement("header",
new XElement("asn-number", s.asnnumber),
new XElement("po-number", s.ponumber),
new XElement("po-date", s.podate)),
new XElement("details",
new XElement("tracking-number", s.trackingnum),
new XElement("ship-date", s.shipdate),
new XElement("shipping-carrier", s.carrier),
new XElement("shipping-method", s.method),
s.orderitems.Select(i => new XElement("package-details",
new XElement("line-number", x++),
new XElement("item-id", i.itemid),
new XElement("quantity", i.quantity)))
));
doc.Root.Add(shipment);
x = 1;
}
The fist problem is the first child node I'm not seeing where that is coming from because that node is not even declared until the foreach loop. I was under the impression that I was only adding attributes to the root element.
and the other problem is removing the xml declaration

This sort of the thing is the problem:
new XElement("shipment", ...)
You want the shipment elements to be in the "http://seller.marketplace.sears.com/oms/v5" namespace - so you need to make that explicit. That won't show up in the resulting XML directly, because they'll inherit that as the default namespace specified in the root. Basically, wherever you're creating an element, you probably want to use ns1. So:
new XElement(ns1 + "shipment", new XElement(ns1 + "header", ...), ...)
To understand more about why this is required, you should read up on namespace defaulting in the XML Namespaces specification.
and the other problem is removing the xml declaration
So add an XDeclaration to the XDocument:
XDocument doc = new XDocument(new XDeclaration("1.0", "utf-8", "yes"))

Insert new XML node using LINQ

XML:
<Questions>
<Question>
<Id>1</Id>
<Text>aaa</Text>
<Reserver />
</Question>
<Question>
<Id>2</Id>
<Text>bbb</Text>
<Reserver />
</Question>
</Questions>
How can insert new Question using LINQ like this:
<Question>
<Id>3</Id>
<Text>ccc</Text>
<Reserver />
</Question>

XDocument doc = XDocument.Parse("<Questions>...</Questions>");
doc.Root.Add(
new XElement("Question",
new XElement("Id", 3),
new XElement("Text", "ccc"),
new XElement("Reserver"))
);

You can create a new element like this:
var newElem = new XElement("Question",
new XElement("Id", 3),
...
);
xdoc.Root.Add(newElem);

We Keep Coding

C# (C-Sharp) is a programming language developed by Microsoft that runs on the .NET Framework.

Insert data from C# to XML with using Linq issue? - c#

You should use XAttribute instead of XElement in order to insert ID as attribute: doc.Root.Add( new XElement("Employee", new XAttribute("ID", textBox1.Text), new XElement("Name", textBox2.Text) ) );

Related

XML XElement building an xml document

Write to end of XML with LINQ to XML

Accessing xml elements using LINQ to XML

XML Name Space Not Formating Correctly

Insert new XML node using LINQ

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