Download e-book for iPad: Building Interactive Queries with LINQPad by Sébastien Finot

By Sébastien Finot

ISBN-10: 1782178228

ISBN-13: 9781782178224

question databases interactively utilizing LINQ and LINQPad

Overview

  • Leverage the facility of LINQPad to profit LINQ
  • Discover LINQPad’s key positive factors and options
  • Learn concerning the cool purposes of LINQPad comparable to trying out, code snippet new release, and so on

In Detail

If you want to engage with databases, XML, in-memory collections, or distant providers, LINQ could make your existence easier. how you can detect LINQ is with the aid of LINQPad, a loose IDE whose first aim is to ensure that writing and interacting together with your LINQ question is enjoyable and straightforward. extra often, LINQPad is a C#/VB/F# scratchpad that immediately executes any expression, assertion block, or software with wealthy output formatting and a wealth of features.

With development Interactive Queries with LINQPad, you'll fast study every little thing you must comprehend to begin utilizing LINQ. To speed up your studying curve, you can find the right way to use LINQPad and its gains to check your queries interactively and scan with the entire strategies provided via LINQ.

In all chance, C#, yet have you ever had an opportunity to aim out LINQ? development Interactive Queries with LINQPad will introduce you to every little thing LINQ can provide and may allow you to have interaction with each instance in LINQPad, LINQ’s top companion.

You will easy methods to construct and test with interactive queries with this sensible advisor illustrated with brief and particular code samples. additionally, you will get conversant in different cool functions of LINQpad comparable to checking out, code snippet iteration, and so forth, in addition to a huge method of LINQ (to item, to SQL, to XML, and so on).

What you'll examine from this book

  • Discover what LINQ can do and the way it's going to aid you
  • Learn all approximately LINQ question operators to affix, combination, choose, and clear out data
  • Write LINQ queries with either approach and question syntaxes
  • Query databases and distant prone utilizing LINQ
  • Create and manage XML and in-memory collections
  • Differentiate LINQPad’s question types
  • Handle consumer enter with LINQPad
  • Customize LINQPad to suit your style or workflow

Approach

A step by step useful advisor that may introduce you to LINQPad’s key gains, thereby aiding you to question databases interactively.

Who this booklet is written for

This ebook is geared toward C#/.Net builders who desire to examine LINQ programming and leverage the straightforward manner of utilizing LINQPad. No past wisdom of LINQ or LINQPad is anticipated. A simple wisdom of SQL and XML is needed for a few chapters.

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Extra resources for Building Interactive Queries with LINQPad

Sample text

FaceValue; } What happens here is that LINQ calls this expression on every object of the collection and compares the value returned by it (the value of FaceValue in our case) to sort the collection. FaceValue; } This code will produce exactly the same result as the one with the lambda expression. Most of the time, lambda expressions will be the best way to achieve your goals in a short and readable way, and LINQ makes extensive use of it. The Where query operator works the same way, except its parameter is Func.

You can change the query type by changing the language dropdown on top of the code editor window, as shown in the following screenshot: You can use Ctrl + 1 through Ctrl + 9 to quickly change the query language The C#/F#/VB expression In LINQPad, an expression query is a one-line piece of code that returns a result. It never ends with a semicolon, and the result of the expression is automatically output to the result window. NewGuid() // 2603e64a-aaf8-4406-a5bf-32424044ff80 By selecting the appropriate language (between C#, F#, and Visual Basic) you can run the query in this language.

It can be an array, a List, a Dictionary or even a Collection, or any class you created that implements IEnumerable. We are going to start by creating a collection and adding some elements to it. Dump("initial collection"); Discovering LINQ Query Operators Now run it. You will get result as shown in the following screenshot: Now that we have a collection, we can apply LINQ Query operators to it. Save your query as we are going to expand on it in the next examples. Query operators Query operators are grouped by Microsoft for their purpose.

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Building Interactive Queries with LINQPad by Sébastien Finot


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