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Download Building Interactive Queries with LINQPad by Sébastien Finot PDF

By Sébastien Finot

how you can question databases interactively utilizing LINQ and LINQPad

Overview

  • Leverage the ability of LINQPad to profit LINQ
  • Discover LINQPad’s key good points and options
  • Learn in regards to the cool purposes of LINQPad akin to checking 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. the way to observe LINQ is with assistance from LINQPad, a unfastened IDE whose first target is to ensure that writing and interacting together with your LINQ question is enjoyable and simple. extra more often than not, 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 construction Interactive Queries with LINQPad, you'll quick research every little thing you must be aware of to begin utilizing LINQ. To speed up your studying curve, you'll find how you can use LINQPad and its gains to check your queries interactively and scan with all of the techniques provided by way of LINQ.

In all chance, you recognize C#, yet have you ever had an opportunity to attempt out LINQ? development Interactive Queries with LINQPad will introduce you to every thing LINQ can supply and may allow you to engage with each instance in LINQPad, LINQ’s most sensible companion.

You will methods to construct and scan with interactive queries with this functional consultant illustrated with brief and distinct code samples. additionally, you will get accustomed to different cool purposes of LINQpad similar to trying out, code snippet iteration, and so forth, in addition to a large method of LINQ (to item, to SQL, to XML, and so on).

What you'll study from this book

  • Discover what LINQ can do and the way it is going to support you
  • Learn all approximately LINQ question operators to affix, combination, decide upon, and filter out data
  • Write LINQ queries with either strategy and question syntaxes
  • Query databases and distant companies utilizing LINQ
  • Create and manage XML and in-memory collections
  • Differentiate LINQPad’s question types
  • Handle person enter with LINQPad
  • Customize LINQPad to suit your flavor or workflow

Approach

A step by step functional advisor that may introduce you to LINQPad’s key positive factors, thereby supporting you to question databases interactively.

Who this publication is written for

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

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Additional info for Building Interactive Queries with LINQPad

Example text

Any() doesn't have any similar query syntax and is always used as a method. The All() query operator All() checks that every item of the collection matches the condition. You always need to provide a condition. "); [ 44 ] Chapter 4 collection is still the same string array with the "quick brown fox" phrase. As our smallest word has a length of three letters, this will return true, as shown in the following screenshot: All() will stop as soon as an item does not match the condition. All() doesn't have any similar query syntax and is always used as a method.

We will see anonymous types in Chapter 5, Databases and Relational Data. For the rest of this book, and unless the type of the variable needs to be explicitly written (for pedagogical reasons for example), I will prefer var. Feel free to experiment without var if you don't feel comfortable or prefer explicit notation. The OfType() query operator OfType() will filter your collection based on the type you provide. This can prove extremely useful when you're dealing with a base type object collection and need to extract a specific subtype (or if you are dealing with untyped collections).

You could also (as we saw in the previous chapter) use a named function rather than a lambda expression. Length == 5; } Running the query will yield result as shown in the following screenshot: It's also worth noting that Any() will stop enumerating as soon as an item matching the condition is found. Any() doesn't have any similar query syntax and is always used as a method. The All() query operator All() checks that every item of the collection matches the condition. You always need to provide a condition.

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