Download E-books Mastering Entity Framework PDF

Effortlessly produce data-driven functions for .NET to handle the competing calls for of information garage and information modeling with Entity Framework

About This Book

  • Understand every little thing that calls for to successfully commence constructing and handling information pushed purposes utilizing Entity Framework.
  • Implement an example-based method of comprehend a number of thoughts linked to Entity Framework
  • Save time, examine speedier, and assemble wisdom that might supply complex content material on constructing and dealing with data-driven functions utilizing the Entity FrameworkData entry is a vital part of any software program software. Entity Framework presents a accomplished, model-based process that makes the information entry easy for builders by means of releasing you from writing related facts entry code for the entire area models

Who This ebook Is For

This e-book is for .NET builders who're constructing data-driven functions utilizing ADO.NET or different information entry applied sciences. This e-book goes to provide you every thing you must successfully boost and deal with data-driven functions utilizing Entity Framework.

What you are going to Learn

  • Find out some great benefits of utilizing Entity Framework over undeniable ADO.NET
  • Discover a variety of techniques of utilizing Entity Framework similar to Database First, version First, and Code First, and likewise easy methods to select the easiest procedure for a given scenario
  • Explore the best way to deal with Entity relationships, enforce Entity inheritance, and practice version validations
  • Understand tips to use kept techniques and features utilizing Entity Framework
  • Familiarize your self with area modeling utilizing Entity Framework
  • Become knowledgeable in handling database construction and seeding dummy information in a database
  • Understand LINQ to Entities and Entity SQL to question information utilizing Entity Framework
  • Manage concurrency and transactions utilizing Entity Framework

In Detail

Data entry is an essential component of any software program software. Entity Framework presents a model-based approach that makes facts entry easy for builders by way of liberating you from writing related facts entry code for your entire area models.

Mastering Entity Framework will give you more than a few strategies while constructing a data-oriented software. you will get begun by way of dealing with the database relationships as Entity relationships and practice area modeling utilizing Entity Framework. you are going to then discover how one can reuse information entry layer code comparable to kept strategies and table-valued services, and practice numerous normal actions reminiscent of validations and blunder dealing with. you are going to the right way to retrieve information through querying the Entity facts version and know how to exploit LINQ to Entities and Entity SQL to question the Entity information Model.

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PhoneNumber, dbo. worker. wage, dbo. worker. EMailId, dbo. worker. EmployerId, dbo. Employers. EmployerName FROM dbo. worker LEFT OUTER sign up for dbo. Employers ON dbo. worker. EmployerId = dbo. Employers. identification pass Now, let's create the EDM for this database schema. the key to recollect whereas doing this can be that we have to comprise the database perspectives too once we are developing our EDM: uploading perspectives into the EDM as soon as the EDM is created, we will be able to see that the knowledge version includes entities similar to the tables in addition to one entity for our view: The EDM exhibiting the database view as an entity If we have a look at the generated version for the view entity, then we will see that it comprises the houses for all of the columns that the view is returning: public partial type EmployeeView { public string FirstName { get; set; } public int identification { get; set; } public string LastName { get; set; } public string PhoneNumber { get; set; } public decimal wage { get; set; } public string EMailId { get; set; } public Nullable EmployerId { get; set; } public string EmployerName { get; set; } } Now, if we wish to fetch the knowledge utilizing this view, all we have to do is to take advantage of the DbContext item to retrieve this conceptual version: utilizing (SampleDbEntities db = new SampleDbEntities()) { IEnumerable staff = db. EmployeeViews. ToList(); } What occurs after we run the previous code is that Entity Framework will execute the view within the database, after which map the end result values with the homes of the EmployeeView entity, and go back the gathering of the EmployeeView entity. Let's attempt to visualize the knowledge that's being retrieved via executing the previous code: Fetching the worker facts utilizing a database view within the previous screenshot, we will see that EmployeeView comprises the knowledge from worker in addition to the organisation desk, that is all being populated by way of executing the view at the database. Tip perspectives are rather necessary after we need to fetch facts from a number of tables and convey it to the consumer. If we've situations the place we've got conditional queries the place the applying will move a few parameters, and the information will be fetched in line with those parameters, then it really is higher to take advantage of saved strategies instead of utilizing perspectives. utilizing Entity Framework with saved strategies saved methods are the way to outline the information entry performance within the database itself. the most important good thing about utilizing kept methods is if we've got a number of functions utilizing a similar database, then utilizing kept techniques guarantees that the knowledge entry performance is constant throughout all of the purposes because it is outlined within the info layer itself. additionally, saved strategies let larger functionality and higher encapsulation. saved approaches additionally safeguard us from the SQL injection safety matters, so that they permit larger safeguard. Tip saved systems are way more strong than perspectives. perspectives may still in simple terms be used to learn information from the database. View are extra like digital tables from the database point of view.

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