Linq xml c create pdf

Creating xml using xdocument with object that has two lists. Create an xml document with linq to xml intertech blog. It is creating the xml file but can i formate the xml file. Xml parser that creates such a tree is known as a dom parser. In this article, we will see basic things on how to work with xml using linq, where we will deal with storing and reading server information in xml format. Net framework functionalities like debugging, compiletime checking, strong typing and. Text content is released under creative commons bysa. The signatures of the xelement and xattribute constructors let you pass the contents of the element or attribute as arguments to the constructor. Writexml, but my concern it is so easy to create the xml document by using the linq to xml. In this update, youll discover the tight integration of xml with ado. Linq is a readable code that can be used as a standard way to extract data from xml documents, arrays, relational databases, and other thirdparty data sources. The only thing that changes is the return type of the method. Like i want to run this getemployeesstring country then it run my following code and generate the xml file.

Companies, names and data used in examples herein are fictitious unless otherwise noted. Linq, the same data query can be written in a readable colorcoded form like the following one mentioned below that too in a very less time. For reference documentation for the extension methods that help you validate xml trees against an xsd file, see system. See credits at the end of this book whom contributed to the various chapters. Programming with linq to xml for objects linq to xsd. The xmlreadersettings objects has a schemas property that can be used to perform xsd or dtd validation. Linq xml linq to xml offers easy accessibility to all linq functionalities like. The ienumerable interface has a single method, getenumerator, which returns an ienumerator while the yield keyword can be used to directly create an ienumerable, it can also be used in exactly the same way to create an ienumerator. An attribute of the element can be defined by using the xattribute class.

In this approach, the queried results for linq to xml are used in the constructors of xelement and xattribute objects to create and transform the xml trees. I will explain you about to create the xml file using linq to xml. And last i want to add another sql statement in the string select from employees where city london it will show these result in the same xml file at bottom. Conversion of standard query operators of linq as well as linq expressions into command trees. In the example code below, data source is a collection of few books stored in an array called book. Net have been around for a very long time, but their constant growth means theres always more to learn.

Use linq to xml to extract and manipulate data from. The code is shared below the legacy code has been commented out. Linq to entities query creation and execution process. The following example creates an xdocument, saves the document to a stringwriter, and then prints the string to the console. Net framework that encompass languageintegrated query, set, and transform operations. Hi, how can i take the results of a linq query and convert to xml and save to file. Today xml is generally used to store data and transport it on the web. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any. Introduction of linq to xml while using linq to xml, loading xml documents into memory is easy and more easier is quering and document modification.

To save it, you could use serialization in my option, easyly to do or xmldocument and xmlwriter to do fine but dificult to do. Linq namespace, this class is inherit by xcontainer class. By using the current apis, it is slightly cumbersome to handle and play with xml data. Create xml using linq to xml functional construction is the simplest linq to xml approach that is used to create a xml file. By including an xml schema document, linq to xsd will code generate strongly typed wrapper classes, permitting you to read and write the xml document as easily as you would create and use any objects. Thats one of the benefits of linq to xml, that it makes life easier for developers by making it so easy to create and structure xml documents. When my current project started in 2007, linq was just starting out and i wanted to stay with the famliar to generate the xml document so i used the system. Whether xml is being queried, parsed, or transformed, linq to xml can almost always be used as an easier alternative to previous technologies that are based on xmlspecific languages xpath, xquery, xslt. This modified text is an extract of the original stack overflow documentation created by following contributors and released under cc bysa 3. Microsofts query language is fully integrated and offers easy data access from inmemory objects, databases, xml documents, and many more. For reference documentation for the extension methods that enable you to evaluate xpath queries on an xml tree, see system.

Net language integrated query linq to objects datasets linq to sql linq to entities linq to xml objects relational xml figure 3. I would instead create each new document, including the address, then add that to documents. Linq to xsd is an extension of the core linq technologies and is at present still in alpha. Net framework, linq to xml also makes the best use of.

Shows how to use the let clause to calculate intermediate values in a linq to xml query. Create xml from database using linq dot net tricks. This can be useful if we want to create our own class which implements. Net support for todays restful web services and web api. While you could use linq to xml as little more than a simpler way to create xml documents, you can also. Linq creates report class based on the database table called dbo. An example of this is to transform an object model into an xml document suitable for transmission to a web service. For using xsd, you can load xml using an xmlreader, and an xmlreader accepts to create an xmlreadersettings. On above code, we have used the simplified dynamic object approach. The below lines of code explains the usage of linq and also the advantages of using linq compared to a legacy approach. The xdocument s root property returns an xelement representing the root element of the xml file.

This is a 500 pages concise technical ebook available in pdf, epub ipad, and mobi kindle. I have tried and achieved 95% only a smail issue remains. It is also possible to save xml documents existing in memory to disk and to serialize them. Create new xml documents using the classes provided by. Icloneable xml nodes can be copied to create a new instance. Linq to xml provides an inmemory xml programming interface that. Some of the major topics we cover include creating xml documents and xml schemas, free tools to validate xml and generate xml schemas, use linq to process xml documents, joining xml documents together to create a new xml document, aggregating data using builtin methods and functions, learn to use xpath queries, add, edit, and delete nodes in. Linqtoxml node creation, simply said, is the natural way to create nodes with code structurally identical to resultant xml. While selecting, you can either create a dynamic object with the properties you need. The acronym linq stands for language integrated query.

In this post, you learn how to create an xml file by using linq. Pdf linq which is the abbreviation of language integrated query substantially. Taking the boredom out of querying joseph albahari. It eliminates the need for a developer to learn the xml query language which is somwhat complex. Linqtoxml node creation, simply said, is the natural way to create nodes with code that is structurally identical to resultant xml. Or you can declare in advance, a class with members and create object of that class. This paper mainly focuses on specification of linq components utilization and main. Linq or language integrated query is a part of the microsoft dot net framework which provides easily understandable data querying facilities to.