5 Easy Facts About dapper tutorial for beginners Described

5 Easy Facts About dapper tutorial for beginners Described

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The very first thing we are going to do is to make a new Dto folder, and inside it, a completely new CompanyForCreationDto class that we are going to use to the Article ask for:

Using the QueryMultipleAsync() method, we can easily execute multiple SQL statements and return various ends in an individual query. Permit’s see how to try this using an example.

We’ll demonstrate tips on how to use dynamic parameters in the subsequent instance, the place we’ll make a new Business entity in our databases.

Dynamic Parameters are Specifically great for complex stored method, in case you require take care of also a return price:

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Now, if we phone this process and move an organization for development to it, it's going to create a new entity for us. But, even though building API’s POST action, it is a superb observe to return a hyperlink, which the API’s customers can use to navigate towards the established entity.

As it is possible to see, there is nothing new with these two procedures. We have now a question and parameters, and we execute our statements Using the ExecuteAsync system.

You've got entire Command over how parameters are sent to your database, as you can see from what get executed:

As you are able to see, our query variable consists of two Choose statements. The initial will return an individual firm, and the next 1 will return all the employees of that company. After that, we create a connection and after that use that connection to get in touch with the QueryMultipleAsync strategy.

We’ll also create a easy repository layer to wrap the logic up to prevent using Dapper dapper tutorial for beginners queries specifically inside the controller.

Lightweight: Dapper is a light-weight library with negligible dependencies. It doesn’t impose any intricate configuration or setup, which makes it straightforward to integrate into your tasks.

Future up, you’ll see how to determine a link for the SQL Server using a link string within the appsettings.json. From there, we’ll generate the code that interacts with our databases, sending queries via Dapper to accomplish the CRUD functions.

This approaches executes a question that return a resultset made of specifically 1 row and a person column. Just like the good aged IDBCommand.ExecuteScalar.

Anyway, Which means that if You merely need to have one particular row or you’re expecting only one row, there isn't any position in loading every thing in memory, and only then getting the very first row or checking if you got particularly a single row, proper? That’s why the methods provided by Dapper must be most well-liked. They'll just get one particular row, devoid of loading many of the Other people in memory. It may seem a very little factor, but are Individuals type of specifics that make performance great instead of just superior.

Simplicity: Dapper delivers a straightforward and intuitive API for executing queries and mapping effects. It means that you can produce SQL queries instantly, supplying you with entire Regulate in excess of your database interactions.