c# print qr code Creating XML in C#

Make QR Code 2d barcode in C# Creating XML

Creating XML
QR Code Generator In Visual C#
Using Barcode generator for .NET Control to generate, create Denso QR Bar Code image in .NET applications.
www.OnBarcode.com
QR Scanner In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
As we discussed earlier in this chapter, LINQ to XML provides a powerful approach to creating XML elements, referred to as functional construction. Functional construction allows a complete XML tree to be created in a single statement. As an example, let s look at how we can create the following XML using functional construction.
EAN128 Generation In C#.NET
Using Barcode encoder for .NET framework Control to generate, create UCC - 12 image in .NET framework applications.
www.OnBarcode.com
Generating GS1 - 12 In Visual C#
Using Barcode generator for .NET Control to generate, create UPC Symbol image in .NET framework applications.
www.OnBarcode.com
<books> <book> <author>Don Box</author> <title>Essential .NET</title> </book> </book>
Generating Matrix In C#.NET
Using Barcode maker for .NET framework Control to generate, create Matrix 2D Barcode image in .NET applications.
www.OnBarcode.com
Draw EAN13 In C#
Using Barcode creator for .NET Control to generate, create EAN-13 image in Visual Studio .NET applications.
www.OnBarcode.com
To create this XML, we can use one of the XElement constructors that allow us to pass in an entire XML fragment as a set of nested XElement objects. See listing 9.11.
USS Code 128 Creator In Visual C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create ANSI/AIM Code 128 image in VS .NET applications.
www.OnBarcode.com
Encoding USD8 In C#
Using Barcode creator for .NET Control to generate, create USD8 image in .NET applications.
www.OnBarcode.com
Listing 9.11 Creating an XElement with functional construction
Printing Denso QR Bar Code In None
Using Barcode maker for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications.
www.OnBarcode.com
Generating QR Code In Java
Using Barcode encoder for Java Control to generate, create QR Code JIS X 0510 image in Java applications.
www.OnBarcode.com
XElement books = new XElement("books", new XElement("book", new XElement("author", "Don Box"), new XElement("title", "Essential .NET") ) );
EAN 128 Printer In Java
Using Barcode creation for BIRT Control to generate, create USS-128 image in Eclipse BIRT applications.
www.OnBarcode.com
Paint QR Code In VB.NET
Using Barcode maker for VS .NET Control to generate, create QR Code ISO/IEC18004 image in .NET framework applications.
www.OnBarcode.com
By indenting the C# code used to create the XML, we can see it take the shape of the resulting XML. Compare this to listing 9.12, which creates the same XML using the imperative construction model provided by LINQ to XML.
Draw UPC - 13 In None
Using Barcode drawer for Online Control to generate, create UPC - 13 image in Online applications.
www.OnBarcode.com
Create Matrix Barcode In .NET
Using Barcode drawer for ASP.NET Control to generate, create Matrix image in ASP.NET applications.
www.OnBarcode.com
Listing 9.12 Creating an XElement using the imperative construction model provided by LINQ to XML
Code 128 Code Set A Encoder In Java
Using Barcode creator for Android Control to generate, create Code 128C image in Android applications.
www.OnBarcode.com
PDF417 Scanner In Visual C#.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
XElement book = new XElement("book"); book.Add(new XElement("author", "Don Box")); book.Add(new XElement("title", "Essential .NET")); XElement books = new XElement("books"); books.Add(book);
2D Barcode Printer In Visual Basic .NET
Using Barcode creation for .NET framework Control to generate, create 2D image in .NET framework applications.
www.OnBarcode.com
Print Barcode In Java
Using Barcode generator for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Working with XML using LINQ
QR-Code Decoder In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Barcode Decoder In VB.NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
While the overall number of lines to create the XML in the two code samples is comparable, the first sample that used functional construction is more readable and more closely resembles the resulting XML. When creating XML using the imperative model, we need to create temporary variables for the various elements that make up the resulting XML. The result is code that is less readable and more prone to errors. When thinking about XML, we often visualize the hierarchy of nodes that make up the XML. When building XML using imperative Add method calls, the code can t easily take on a shape similar to the resulting XML. With functional construction, we can write code that has a shape and feel similar to the resulting XML. This allows us to stay focused on the XML and not have to switch gears. The end result is a more pleasant and enjoyable programming experience. To enable functional construction, the following three constructors are available on XElement.
public XElement(XName name) public XElement(XName name, object content) public XElement(XName name, params object[] content)
The content parameter can be any type of object that is a legitimate child of an XElement. Legitimate child content includes
A string, which is added as text content. This is the recommended pattern to add a string as the value of an element; the LINQ to XML implementation will create the internal XText node. An XText, which can have either a string or CData value, added as child content. This is mainly useful for CData values; using a string is simpler for ordinary string values. An XElement, which is added as a child element. An XAttribute, which is added as an attribute. An XProcessingInstruction or XComment, which is added as child content. An IEnumerable, which is enumerated, and these rules are applied recursively. Anything else, in which case To String() is called and the result is added as text content.
null, which is ignored.
The simplest way to create an XElement is by using a constructor that takes an XName.
XElement book = new XElement("book");
Introducing LINQ to XML
To make working with the LINQ to XML API more usable, the XName class has an implicit conversion from string. This means that LINQ to XML can convert a string, such as book , into an XName object without you explicitly specifying a cast or creating a new XName object. Because of this, we can pass the name of the element ( book ) directly to the XElement constructor. Under the covers, LINQ to XML implicitly converts the string into an XName and initializes the XElement with the XName. Creating leaf elements that have text content is as easy as passing the content as the second parameter to the XElement constructor.
XElement name = new XElement("name", "Steve Eichert");
Copyright © OnBarcode.com . All rights reserved.