This method accepts our question being a parameter and a Func delegate that accepts two parameters of form Firm finish Worker. Within the delegate, we try and extract a firm by its Id price. If it doesn’t exist, we retail outlet it Within the currentCompany variable and incorporate it to your dictionary. Also, we assign all the workers to that recent firm and return it from a Func delegate.
We inject the IConfiguration interface to enable entry to the link string from our appsettings.json file. Also, we make the CreateConnection method, which returns a brand new SQLConnection object. For this to work, we really need to increase several utilizing statements:
QueryMultiple – an extension strategy that executes various queries within the identical command and maps effects
Dynamic Parameters are Primarily great for intricate saved method, just in case you need cope with also a return benefit:
Execute – an extension strategy that we use to execute a command a person or several times and return the quantity of afflicted rows
Plus, in case you are Doing the job within an ecosystem in which you're handling an existing databases or simply a group that handles the database design and style, Dapper may very well be perfect for you!
We’ll tell you about just the repository system in which we apply transactions. All The remainder is really straightforward as we recurring the measures several moments in this article:
public class Personnel public int Id get; set; general public string Title get; set; public int Age get; established; general public string Place get; established; general public int CompanyId get; established;
With this option all is necessary is the fact that nameless item’s fields hold the exact name of your employed parameters. You may use the “@” signal also in the sphere identify If you'd like or you could omit it provided that, all over again, the name matches the parameter you need to assign the worth to.
When the dapper tutorial for beginners target item has actually been specified (“Consumer” in the above sample), mapping is finished by matching the names of returned columns with object properties names.
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It is one of the quickest and most straightforward around, still it is extremely extensible and, higher than all, properly adopted and used in really higher-functionality Web sites. More exclusively has long been developed and it is preserved by the fellows behind StackOverflow, so you're able to ensure it's fight-tested. Supply code is on GitHub
This techniques executes a question that return a resultset manufactured from accurately one particular row and 1 column. Much like the good outdated IDBCommand.ExecuteScalar.
If you wish to find out more about why we use this DTO (and we are going to use another a person for that Update action), you can examine our ASP.Internet Main World wide web API series of article content, the place we clarify The key reason why driving this (posts five and 6 through the series).
Simplicity at its Main: Dapper.NET concentrates on simplicity and ease of use. It won't try to summary away the database, allowing you to put in writing and optimize your SQL queries specifically.