5 Easy Facts About dapper tutorial for beginners Described
5 Easy Facts About dapper tutorial for beginners Described
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Right before employing Dapper in our challenge, we must prepare a database and create a new World-wide-web API undertaking. So, let’s begin with the database.
Using the QueryMultipleAsync() approach, we can easily execute multiple SQL statements and return multiple results in only one question. Allow’s see how to do that having an illustration.
QueryMultiple – an extension process that executes a number of queries throughout the exact same command and maps benefits
Dynamic Parameters are Specifically perfect for complicated saved technique, in the event you need to have manage also a return worth:
We’ll use test-capture blocks in Every single motion within our controller for the instance’s sake. But to stop code repetition, we strongly advise looking at our World-wide Error Dealing with write-up.
Dapper is made to be quick, effective, and simple to use, making it a great choice for builders who want To optimize effectiveness and productiveness.
As you could see, there's nothing new with these two techniques. We've a question and parameters, and we execute our statements While using the ExecuteAsync system.
by default. In order for you have Regulate on how strings are passed into the database, You will need to utilize the DBString course:
With this selection all is needed is the fact that nameless item’s fields hold the similar title of your employed parameters. You should use the “@” indicator also in the sphere name If you prefer or it is possible to omit it as long as, once more, the identify matches the parameter you want to assign the value to.
You can find the finished source code listed here. I hope you acquired a thing new and in depth in the following paragraphs. dapper tutorial for beginners Should you have any remarks or ideas, remember to go away them driving during the comments area below. Usually do not neglect to share this information in just your developer community. Thanks and Satisfied Coding!
Pay attention that In the event your stored technique doesn’t return a value, You need to use the ExecuteAsync strategy for execution.
Future up, you’ll see how to determine a relationship towards the SQL Server using a connection string inside the appsettings.json. From there, we’ll produce the code that interacts with our databases, sending queries as a result of Dapper to perform the CRUD operations.
This techniques executes a question that return a resultset manufactured from exactly a person row and a single column. Much like the very good old IDBCommand.ExecuteScalar.
If you need to learn more about why we use this DTO (and we are going to use Yet another just one for the Update motion), you are able to browse our ASP.Internet Core World-wide-web API number of article content, where we demonstrate The main reason at the rear of this (articles or blog posts 5 and six in the sequence).
Simplicity at its Core: Dapper.Web focuses on simplicity and simplicity of use. It will not attempt to summary away the database, permitting you to jot down and optimize your SQL queries instantly.