Serialize xml string to object c

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Serialize xml string to object c

Photo by NASA on UnsplashIf you do any type of web programming, serialization is something that constantly happens. Any time data needs is converted between a language specific class and some other format, serialization occurs. And that is a costly operation.For most applications, serialization is a cost that is worth the benefits. It's slow, but it's

useful and makes development easier.In my career I've worked with both Json and Xml on different projects and I never knew which one was faster. So I decided to write a benchmark to test it out.We will be testing 2 json, 3 xml and 1 protobuf-net method. Each benchmark will read in a file containing the text for each serialization type. Then access

every element in the class.Each test is remarkably similar, so I'm only going to show a regular json to C# example. Every example is on the github library if you're interested in exploring futher.I'm starting with the following json string generated from this website.Which I've saved to a file, then for the test it performs the following steps:De-

serializesVisits every propertySerializesThe only difference between all the methods is that Probobuf-net uses streams when deserializing/serializing and json and xml uses with strings. I don't think that significantly changes the benchmark, but something to note.Different MethodsSo I'm testing a total of 6 different ways to deserialize/serialize

data:JsonToObjectTest -- testing serializing json string to JObject.JsonToObjectTest -- testing serializing json string to C# class.XmlToObjectTest -- testing serializing xml string to C# class, with a new serializer every time.XmlPrepTimeIncludedTest -- testing serializing xml string to C# class, with the shared serializer included in timing of

test.XmlPrepTimeExcludedTest -- testing serializing xml string to C# class, with the shared serializer not included in the timing of the tests.ProtoBufToObjectTest -- testing protobuf streams to C# class.I'll explain more about the 3 different xml tests, but I ran into some performance issues and wanted to drill down a bit into why xml performance was

so bad.ResultsLaunching this benchmark from the console results in the following statistics.Performance ResultsThe first thing that jumps out to me is what is heck is wrong with XMLToObject! It's performance is about 1000x worse than JsonToObject or ProtoBufToObject!When I first saw these results I didn't believe them! I didn't think that could be

that much slower. So I had to investigate.XML IssuesSo XML has some issues. At first I was baffled, I couldn't wrap my mind around it. So I did some research and eventually discovered this stackoverflow question/answer.When you instantiate an XmlSerializer you have to pass the Type of the objects that you will attempt to serialize and deserialize

with that serializer instance. The serializer examines all public fields and properties of the Type to learn about which types an instance references at runtime. It then proceeds to create C# code for a set of classes to handle serialization and deserialization using the classes in the System.CodeDOM namespace. During this process, the XmlSerializer

checks the reflected type for XML serialization attributes to customize the created classes to the XML format definition. These classes are then compiled into a temporary assembly and called by the Serialize() and Deserialize() methods to perform the XML to object conversions.So basically there's a one time initialization cost to using XmlSerializer. In

the worst performing test, I was creating a new instance every time. Which was the reason for the terrible performance.The two others shared the same XmlSerializer in their benchmarks. Which is why their performance was so much better. The only difference being the XmlPrepTimeIncludedTest included the initial XmlSerializer creation in the

benchmark timing. While the XmlPrepTimeExcludedTest did not.TakeawaysSo what can we take a way from this benchmark? Because serialization is such a costly operation, you shouldn't use it blindly. Subtle differences can lead to drastic performance differences, especially with XML.After using C# professionally for four years, this is the first time

I've heard of this XML problem. Thinking about using XML in the past I've definitely written code that had this performance problem and I had no idea.And lastly, use benchmarks to find out what performance issues your code has. Don't assume if you got something off stackoverflow or patterns already exists in your app that they're performant.I'm

Morgan Kenyon. I'm a .NET developer working in the DFW area. I find C# a great language to use and it's also backed by a great ecosystem, I love solving hard problems and want to continue talking about the tech I use. If you found this article helpful or thought provoking leave a comment and lets connect over LinkedIn!Github Repo Sometimes in

web applications we like to save or send our data as XML to the SQL databases. It's mostly done when there is a large chunk of data or we like to convert our entity model objects to XML. It makes it easier to move data from web applications to SQL database and vice versa. Here I'll share a code snippet to convert C# object to XML and

XML to object C#. Also read : Why do you Need An Interface in C# ? C# Object to XML To convert an object to XML, we'll make use of XmlSerializer to serialize and XmlTextWriter to output the XML string. Here is how the code looks like : public static string GetXMLFromObject(object o) { StringWriter sw = new StringWriter(); XmlTextWriter tw =

null; try { XmlSerializer serializer = new XmlSerializer(o.GetType()); tw = new XmlTextWriter(sw); serializer.Serialize(tw, o); } catch (Exception ex) { //Handle Exception Code } finally { sw.Close(); if (tw != null) { tw.Close(); } } return sw.ToString(); } XML to Object C# Similarly, to convert an XML string to object we make use of the XmlSerializer

to deserialize and XmlTextReader to read the XML string. Here is how the code to convert XML to objects looks like : public static Object ObjectToXML(string xml, Type objectType) { StringReader strReader = null; XmlSerializer serializer = null; XmlTextReader xmlReader = null; Object obj = null; try { strReader = new StringReader(xml); serializer

= new XmlSerializer(objectType); xmlReader = new XmlTextReader(strReader); obj = serializer.Deserialize(xmlReader); } catch (Exception exp) { //Handle Exception Code } finally { if (xmlReader != null) { xmlReader.Close(); } if (strReader != null) { strReader.Close(); } } return obj; } Let's try to use the above code snippets to convert an object to

XML and vice versa. Let's create a class called Employee. Here is how it looks like : public class Employee { public string FirstName { get; set; } public string LastName { get; set; } } Now let's create an instance of the Employee class, fill it up and convert it into XML. Employee emp = new Employee(); emp.FirstName = "Code"; emp.LastName =

"Handbook"; string xml = GetXMLFromObject(emp); Try running the above code and you should be able to get the XML string corresponding to the Employee instance. Here is the XML string : - Code Handbook Now to convert the above generated XML string back to Employee object use the following code: Object obj =

ObjectToXML(xml,typeof(Employee)); And you should have the XML converted into Employee object in the obj variable. Wrapping It Up In this short tutorial, we saw how to convert C# object to XML and XML to object C# using . Also have a look at how to encode and decode JSON data in web application. Do let us know your

thoughts, suggestions, or any issues in the comments below. At times, you may need to parse XML content and convert it into a DOM tree, or, conversely, serialize an existing DOM tree into XML. In this article, we'll look at the objects provided by the web platform to make the common tasks of serializing and parsing XML easy. XMLSerializer

Serializes DOM trees, converting them into strings containing XML. DOMParser Constructs a DOM tree by parsing a string containing XML, returning a XMLDocument or Document as appropriate based on the input data. XMLHttpRequest Loads content from a URL; XML content is returned as an XML Document object with a DOM tree built from

the XML itself. XPath A technology for creating strings that contain addresses for specific portions of an XML document, and locating XML nodes based on those addresses. Using one of the following approaches to create an XML document (which is an instance of Document.This example converts an XML fragment in a string into a DOM tree using a

DOMParser: const xmlStr = 'hey!'; const parser = new DOMParser(); const dom = parser.parseFromString(xmlStr, "application/xml"); console.log(dom.documentElement.nodeName == "parsererror" ? "error while parsing" : dom.documentElement.nodeName); Here is sample code that reads and parses a URL-addressable XML file into a DOM tree:

const xhr = new XMLHttpRequest(); xhr.onload = function() { dump(xhr.responseXML.documentElement.nodeName); } xhr.onerror = function() { dump("Error while getting XML."); } xhr.open("GET", "example.xml"); xhr.responseType = "document"; xhr.send(); The value returned in the xhr object's responseXML field is a Document constructed by

parsing the XML. If the document is HTML, the code shown above will return a Document. If the document is XML, the resulting object is actually a XMLDocument. The two types are essentially the same; the difference is largely historical, although differentiating has some practical benefits as well. Note: There is in fact an HTMLDocument interface

as well, but it is not necessarily an independent type. In some browsers it is, while in others it is an alias for the Document interface. Given a Document, you can serialize the document's DOM tree back into XML using the XMLSerializer.serializeToString() method. Use the following approaches to serialize the contents of the XML document you

created in the previous section.If the DOM you have is an HTML document, you can serialize using serializeToString(), but there is a simpler option: just use the Element.innerHTML property (if you want just the descendants of the specified node) or the Element.outerHTML property if you want the node and all its descendants. const docInnerHtml =

document.documentElement.innerHTML; As a result, docHTML is a DOMString containing the HTML of the contents of the document; that is, the element's contents. You can get HTML corresponding to the and its descendants with this code: const docOuterHtml = document.documentElement.outerHTML; XPath XMLHttpRequest Document,

XMLDocument, and HTMLDocument Here's how you can convert your XML string to C# classes, we will be using the converter and built in libraries like 'System.Xml.Serialization' to parse our object. 1. Copy the XML string inside the first code editor The XML string should be correctly formatted before converting it to C# classes. Here's an example

of an XML string: 100011 RestAPI - Immobilienscout24 Testobjekt! +++BITTE+++ NICHT kontaktieren - Industry 2013-12-06T15:12:09 2014-07-08T15:12:09 32.678 YES ENERGY_CONSUMPTION 435.017 three 249.014 EUR RENT MONTH 2. Click Convert in order to start generating C# classes. You can optionally choose from the settings to: Use

Pascal Case notation (ie: PascalCase) for your class name and properties Use fields or remove getters and setters from the output Remove XML Attributes or just output the classes without the XML attribute annotations Add Namespace Attributes in case you have fields with different schema prefix 3. Copy the retuned C# classes and deserialize using

the XmlSerializer class When you copy the returned classes in the directory of your solution, you can deserialize your XML string or file using the 'Root' class as mentioned in commented example below: Here are the classes returned from the previous example: /* using System.Xml.Serialization; XmlSerializer serializer = new

XmlSerializer(typeof(Realestates)); using (StringReader reader = new StringReader(xml)) { var test = (Realestates)serializer.Deserialize(reader); } */ [XmlRoot(ElementName="additionalCosts")] public class AdditionalCosts { [XmlElement(ElementName = "value")] public string Value { get; set; } [XmlElement(ElementName = "currency")] public

string Currency { get; set; } [XmlElement(ElementName = "marketingType")] public string MarketingType { get; set; } [XmlElement(ElementName = "priceIntervalType")] public string PriceIntervalType { get; set; } } [XmlRoot(ElementName = "realestates")] public class Realestates { [XmlElement(ElementName = "externalId")] public string

ExternalId { get; set; } [XmlElement(ElementName = "title")] public string Title { get; set; } [XmlElement(ElementName = "creationDate")] public string CreationDate { get; set; } [XmlElement(ElementName = "lastModificationDate")] public string LastModificationDate { get; set; } [XmlElement(ElementName = "thermalCharacteristic")] public

string ThermalCharacteristic { get; set; } [XmlElement(ElementName = "energyConsumptionContainsWarmWater")] public string EnergyConsumptionContainsWarmWater { get; set; } [XmlElement(ElementName = "buildingEnergyRatingType")] public string BuildingEnergyRatingType { get; set; } [XmlElement(ElementName = "additionalArea")]

public string AdditionalArea { get; set; } [XmlElement(ElementName = "numberOfFloors")] public string NumberOfFloors { get; set; } [XmlElement(ElementName = "additionalCosts")] public AdditionalCosts AdditionalCosts { get; set; } } This is how can you deserialize your XML string in your C# code: XmlSerializer serializer = new

XmlSerializer(typeof(Realestates)); using (StringReader reader = new StringReader(xml)) { var test = (Realestates)serializer.Deserialize(reader); } And this is how can you deserialize your XML file in your C# code: XmlSerializer serializer = new XmlSerializer(typeof(Realestates)); using (StreamReader reader = new

StreamReader(pathOfYourXMLFile)) { var test = (Realestates)serializer.Deserialize(reader); } XML Serializer ? Sample Code ? How to take a C# object and write it to a file in XML "serialized" format. NOTE: Serialize means to take an object (in memory) and turn it to a format that can be preserved to disk (or sent over a wire). Deserialize means to

take the serialized-format, and turn it back into an object (in memory). Calling Program ? to use Subroutine in Next Code Sample Below using System.Xml.Serialization; using System.IO; using System.Xml; ... // Serialize an object in memory to disk.

XmlSerializer xs1 = new XmlSerializer(typeof(YourClassName));

StreamWriter sw1 =

new StreamWriter(@"c:DeserializeYourObject.xml");

xs1.Serialize(sw1, objYourObjectFromYourClassName);

sw1.Close(); // Now to deserialize it - assuming this might be a different program, run later.

XmlSerializer xs2 = new XmlSerializer(typeof(YourClassName));

StreamReader sr2 = new

StreamReader(@"c:DeserializeYourObject.xml");

// deserialize and cast back to proper class

objYourObjectFromYourClassName = (YourClassName) xs2.Deserialize(sr2);

sr2.Close();

Console.WriteLine ("Deserialize2 completed"); NOTE: Serializing to a string in memory is a lot trickier than you might think, because you

have to deal with byteArrays, and encoding. Here's a link to a page that explains how to do it: XMLHelper Class Library ? with SerializeObject and DeserializeObject Based on the above article, I put the following code in my "Common" C# Component library that is deployed on all my systems:

///

/// Method to convert a custom Object to XML

string

///

/// Object that is to be serialized to XML

/// XML string

public static String SerializeObject(Object pObject)

{

try

{

String XmlizedString = null;

MemoryStream memoryStream = new MemoryStream();

XmlSerializer xs = new XmlSerializer(pObject.GetType());

XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8);

xs.Serialize(xmlTextWriter, pObject);

memoryStream = (MemoryStream)xmlTextWriter.BaseStream;

XmlizedString = UTF8ByteArrayToString(memoryStream.ToArray());

return XmlizedString;

}

catch (Exception e)

{

System.Console.WriteLine(e);

return null;

}

}

///

/// Method to reconstruct turn XMLString back into Object

///

///

///

public static Object DeserializeObject(String pXmlizedString, Type classType)

{

XmlSerializer xs = new

XmlSerializer(classType);

MemoryStream memoryStream = new MemoryStream(StringToUTF8ByteArray(pXmlizedString));

XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8);

return xs.Deserialize(memoryStream);

}

private static String UTF8ByteArrayToString(Byte[] characters)

{

UTF8Encoding encoding = new UTF8Encoding();

String constructedString = encoding.GetString(characters);

return (constructedString);

}

private static Byte[] StringToUTF8ByteArray(String pXmlString)

{

UTF8Encoding encoding = new UTF8Encoding();

Byte[] byteArray =

encoding.GetBytes(pXmlString);

return byteArray;

} Just wrap the above with your class name, and add these using statements: using System; using System.Collections.Generic; using System.Collections; using System.Text; using System.Xml; using System.Reflection; using System.Xml.Schema; using System.IO; using

System.Xml.Serialization; using System.Text; Added June 2020 Example C# Class To Serialize The object to be serialized is created from the PurchaseOrder850 class below. This class happens to represent a EDI 850 Purchase Order, but same concept works with any class. This is shows a two level hierarchy, where one Purchase Order has many line

items. So the first class (PurchaseOrder850) references the second class (PurchaseOrder850LineItem). public class PurchaseOrder850 {

public string PONum;

public string PODateText;

public DateTime PODate;

public string POType;

public string VendorNumber;

public string BuyerName;

public string

BuyerTelephone;

public List LineItems; } public class PurchaseOrder850LineItem {

public string lineItem;

public int quantity;

public string uom;

public decimal price;

public string basisOfUnitPrice;

public string catalogNumber;

public string description;

public string dateRequiredTxt;

public

DateTime dateRequired; } Example Serialized XML 1234567890 20080827 2008-08-27T00:00:00 NE 2046159 JANE WATSON 800-555-1234

00010 50 EA 47.06 HP CATCR50 CABLE RETAINER CLIP PLASTIC 20080903 2008-09-03T00:00:00

00020 200 EA 427.01 HP 512

T-BAR *** BOX HANGER 20080903 2008-09-03T00:00:00

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