In advance of using Dapper within our undertaking, we must prepare a databases and develop a new Website API task. So, let’s begin with the database.
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 fresh SQLConnection item. For this to operate, we have to increase quite a few utilizing statements:
As you can see, right after making a new firm from the database, we return a path to fetch our freshly established entity.
Dealing with the update and delete is very basic since we already have many of the essential information. So, Enable’s soar straight for the code.
The very first thing we’ll do is produce a new ASPNetCoreDapper database. Following the databases creation, you are able to navigate to our resource code repository and discover a script (First Script with Information.sql) which you could execute to make two tables and populate them with information:
At the time we get a number of outcomes In the multi variable, we are able to extract both of those benefits (business and workforce per that firm) by utilizing the ReadSignleOrDefaultAsync and ReadAsync methods. The 1st technique returns one result, even though the next returns a set.
As you could see, there is nothing new Using these two solutions. Now we have a question and parameters, and we execute our statements Along with the ExecuteAsync strategy.
by default. If you'd like have Command on how strings are handed towards the database, You should use the DBString class:
QueryFirstOrDefault – we use this technique to execute a query and map the main end result or even a default benefit Should the sequence has no things
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public int CustomerID get; established; general public string FirstName get; established; public string LastName get; set; general public string Electronic mail get; set;
It is among dapper tutorial for beginners the fastest and easiest close to, nevertheless it's very extensible and, higher than all, well adopted and used in quite substantial-functionality Sites. Far more especially continues to be formulated and it is managed by the blokes powering StackOverflow, so you can be sure it is actually fight-analyzed. Resource code is on GitHub
This procedures executes a question that return a resultset fabricated from precisely a person row and a single column. Much like the fantastic previous IDBCommand.ExecuteScalar.
To execute CRUD functions from the database, we have to build a reference to the database utilizing a databases connection.
When talking about these extension methods, we must say that Dapper supports synchronous and asynchronous system executions. We’ll use the asynchronous Model of Individuals methods.