By N. Satheesh Kumar

This ebook will get you all started with LINQ and indicates the way it will make your programming existence more uncomplicated through applying new gains from the .NET Framework 3.0. This e-book is divided into seven chapters, every one of that is devoted to offering a characteristic of LINQ and its utilization in real-life scenarios.Language built-in question (LINQ) is a brand new characteristic in visible Studio 2008 that extends its question functions, utilizing C# and visible simple. visible Studio 2008 comes with LINQ supplier assemblies that let using LINQ with info assets resembling in-memory collections, SQL relational databases, ADO.NET Datasets, XML files, and so on. In visible Studio 2008, visible C# and visible simple are the languages that enforce the LINQ language extensions. LINQ language extensions use the recent ordinary question operators API, that is the question language for any assortment that implements IEnumerable.This ebook is for .NET builders who are looking to discover precisely what LINQ is, what it may do for them, and the way to software with LINQ.This publication presumes a legitimate wisdom of XML, ADO.NET, and .NET information access-No wisdom of LINQ is presumed.

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This increases the robustness of the application. All the errors are caught at compile time instead of runtime, as it happens when we write SQL queries while programming. Technical architects or software designers, can design their own LINQ providers for the data source they use. By implementing a new provider, they can give the query, language support to the data model they use. 0 framework. Linq namespace; we have seen most of the LINQ to XML classes in the examples given in the previous sections.

TakeWhile() uses an expression to include the elements in the collection as long as the condition is true and it ignores the other elements in the list. This expression represents the condition to test the elements in the collection for the match. ToString()); } Similarly, we can skip the items in the collection using SkipWhile(). It uses an expression to bypass the elements in the collection as long as the condition is true. This expression is used to evaluate the condition for each element in the list.

XQuery is based on the XPath language. It has the ability to iterate, sort, and construct the necessary XML. If the XML document is stored in the SQL server database, which has support for XML, the document can be queried using XQuery. The result of the XQuery can be typed or un-typed. The type information of the result is based on the type, which is specified in the XML schema language. LINQ provides query features to write queries against XML, as we do normally with the relational data model.

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