5 Simple Techniques For dapper tutorial for beginners

5 Simple Techniques For dapper tutorial for beginners

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Using the QueryMultipleAsync() process, we can easily execute a number of SQL statements and return a number of ends in one query. Enable’s see how to do that having an case in point.

Access the full implementation and learn how every thing operates under the hood. Don't forget to star my GitHub repo if you discover it practical!

It is crucial to understand that Dapper is SQL Injection Secure mainly because we will use parameterized queries, which we should always usually do. One more essential matter is always that Dapper supports many databases companies. It extends ADO.NET’s IDbConnection and provides practical extension strategies to question our database. Obviously, We now have to write queries compatible with our database company.

Execute – an extension approach that we use to execute a command just one or various times and return the number of impacted rows

QuerySingleOrDefault – executes a question and maps The end result or perhaps a default value If your sequence is empty. It throws an exception when there is multiple component while in the sequence

Now it’s time to check our number of tutorials to cause you to understand Dapper and utilize it dapper tutorial for beginners confidently in your .NET apps.

You have whole Handle over how parameters are sent to the databases, as you are able to see from what get executed:

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We’ll also create a straightforward repository layer to wrap the logic up to stay away from employing Dapper queries specifically inside the controller.

Executes a query and maps the result to a listing of dynamic objects or, if specified, to a list of strongly typed objects:

This is very concise and thoroughly clean, but it really doesn’t allow to specify if a parameter is definitely an input or output parameter, and the information variety is inferred within the parameter form by itself. Listed here’s what get executed around the database:

If you'd like to find out how to make a thoroughly-fledged Repository Sample, you can study our post on that subject. Also, you could find the async Model of it if you need to produce it this way.

If you want to find out more about why we use this DTO (and we are going to use An additional a person for that Update action), you can browse our ASP.Internet Main World-wide-web API series of articles, wherever we describe the reason guiding this (content articles five and 6 within the sequence).

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