Create XML using XmlTextWriter in c#?

Question

Hi all , i want to create XML like below using XmlTextWriter and also want to read using XmlTextReader in my C# application. Ford Figo RJ27-CB-8551 White Bajaj Pulsur RJ27-SE-1551 Black 180 plsease help me to create and read this. :) thanks in advance :)

Vulpes · Answer

Try this: using System; using System.Xml; class Test { static void Main() { var settings = new XmlWriterSettings(); settings.Indent = true; using (var w = XmlWriter.Create("sumit.xml", settings)) { w.WriteStartElement("VehicleDetail"); w.WriteStartElement("CAR"); w.WriteElementString("Company", "Ford"); w.WriteElementString("Model", "Figo"); w.WriteElementString("CarNumber", "RJ27-CB-8551"); w.WriteElementString("Colour", "White"); w.WriteEndElement(); w.WriteStartElement("BIKE"); w.WriteElementString("Company", "Bajaj"); w.WriteElementString("Model", "Pulsur"); w.WriteElementString("BikeNumber", "RJ27-SE-1551"); w.WriteElementString("Colour", "Black"); w.WriteElementString("CC", "180"); w.WriteEndElement(); w.WriteEndElement(); } // now read it back var settings2 = new XmlReaderSettings(); settings2.IgnoreWhitespace = true; using (var r = XmlReader.Create("sumit.xml", settings2)) { r.MoveToContent(); r.ReadStartElement("VehicleDetail"); r.ReadStartElement("CAR"); Console.WriteLine("Car details"); r.ReadStartElement("Company"); Console.WriteLine(" Company = {0}", r.ReadString()); r.ReadEndElement(); r.ReadStartElement("Model"); Console.WriteLine(" Model = {0}", r.ReadString()); r.ReadEndElement(); r.ReadStartElement("CarNumber"); Console.WriteLine(" Car Number = {0}", r.ReadString()); r.ReadEndElement(); r.ReadStartElement("Colour"); Console.WriteLine(" Colour = {0}", r.ReadString()); r.ReadEndElement(); r.ReadEndElement(); r.ReadStartElement("BIKE"); Console.WriteLine("
Bike details"); r.ReadStartElement("Company"); Console.WriteLine(" Company = {0}", r.ReadString()); r.ReadEndElement(); r.ReadStartElement("Model"); Console.WriteLine(" Model = {0}", r.ReadString()); r.ReadEndElement(); r.ReadStartElement("BikeNumber"); Console.WriteLine(" Bike Number = {0}", r.ReadString()); r.ReadEndElement(); r.ReadStartElement("Colour"); Console.WriteLine(" Colour = {0}", r.ReadString()); r.ReadEndElement(); r.ReadStartElement("CC"); Console.WriteLine(" CC = {0}", r.ReadString()); r.ReadEndElement(); r.ReadEndElement(); r.ReadEndElement(); } Console.ReadKey(); } }

Vulpes · Answer

OK, this should do all that: using System; using System.Linq; using System.Xml.Linq; class Test { static void Main() { XElement VehicleDetail = XElement.Load("sumit.xml"); XElement car = new XElement("CAR"); car.Add(new XElement("Company", "Maruti")); car.Add(new XElement("Model", "Swift")); car.Add(new XElement("CarNumber", "RJ27-CB-0007")); car.Add(new XElement("Colour", "Black")); VehicleDetail.Add(car); XElement bike = new XElement("BIKE"); bike.Add(new XElement("Company", "Honda")); bike.Add(new XElement("Model", "Unicorn")); bike.Add(new XElement("BikeNumber", "RJ27-SS-1233")); bike.Add(new XElement("Colour", "Red")); bike.Add(new XElement("CC", "180")); VehicleDetail.Add(bike); Console.WriteLine(VehicleDetail); // print amended document to console VehicleDetail.Save("sumit2.xml"); // save to new file, say // now read it back Console.WriteLine(); foreach(var vehicle in VehicleDetail.Elements()) { Console.WriteLine("Details for " + vehicle.Name.ToString().ToLower()); foreach(var element in vehicle.Elements()) { Console.WriteLine("{0} = {1}", element.Name.ToString(), element.Value); } Console.WriteLine(); } Console.ReadKey(); } }

Sumit Kumawat · Answer

Hi Vulpes, thanks for your reply.But my requirement is adding new details in Car and bike node and i also want to maintain my previous details. i used XDocument for this but i was not able to read both node from XDocument. i want like below XML structure when first time my XML created :- Ford Figo RJ27-CB-8551 White Bajaj Pulsur RJ27-SE-1551 Black 180 now if i added new data in my XML it should be look like this Ford Figo RJ27-CB-8551 White Bajaj Pulsur RJ27-SE-1551 Black 180 Maruti Swift RJ27-CB-0007 Black Honda Unicorn RJ27-SS-1233 Red 180 now i also want to read . thanx

Vulpes · Answer

Although XmlWriter is useful for quickly writing an XML document node by node to a file, it's useless for inserting nodes into an existing file. This is because it can only work in a forward direction and, so to insert a node, you'd have to rewrite the whole document, including the inserted node, back to the file which is clearly impractical. However, inserting nodes is very easy with LINQ to SQL which can manipulate the document in memory before writing it back to the file. Suppose you wanted to add a CC child node to your CAR node. Here's how you'd do it: using System; using System.Linq; using System.Xml.Linq; class Test { static void Main() { XElement VehicleDetail = XElement.Load("sumit.xml"); XElement car = VehicleDetail.Element("CAR"); car.Add(new XElement("CC", "1200")); Console.WriteLine(VehicleDetail); // print amended document to console VehicleDetail.Save("sumit2.xml"); // save to new file, say Console.ReadKey(); } }

Sumit Kumawat · Answer

Hi Vulpes, Thnaks for your reply its working as i wanted. :) but now i have one more doubt if i want one more node in existing XML then how can i add using XmlTextWriter.