Right before utilizing Dapper inside our undertaking, we must prepare a database and produce a new Net API task. So, Allow’s start with the databases.
Here’s a summary That which you can anticipate to get returned by Every method in the event that your question return no rows, one row or various rows:
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Now, we are going to take care of a POST request in our API and make use of the ExecuteAsync method to make a new corporation entity within the databases.
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QuerySingleOrDefault – executes a question and maps The end result or even a default value Should the sequence is empty. It throws an exception if there is multiple element within the sequence
Now it’s time to check our number of tutorials to cause you to find out Dapper and use it confidently in your .NET apps.
After Dapper is enabled you'll be able to change the Language fall right down to C# Program, map question benefits to C# classes, and utilize the .Dump() approach to examine the final results:
As you are able to see, our query variable consists of two Pick statements. The primary will return an individual corporation, and the next one particular will return all the staff of that firm. After that, we produce a connection and after that use that connection to call the QueryMultipleAsync method.
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Executes a query and maps the result to a summary of dynamic objects or, if specified, to a listing of dapper tutorial for beginners strongly typed objects:
Upcoming up, you’ll see how to determine a relationship into the SQL Server employing a relationship string during the appsettings.json. From there, we’ll publish the code that interacts with our database, sending queries via Dapper to carry out the CRUD operations.
This procedures executes a query that return a resultset product of just one row and just one column. Just like the fantastic old IDBCommand.ExecuteScalar.
This process executes a query that doesn’t return any resultset. Its return price includes that quantity of rows afflicted with the question. If your executed in fact generates a resultset, that can be discarded.
Simplicity: Dapper delivers an easy and intuitive API for executing queries and mapping results. It allows you to produce SQL queries right, giving you comprehensive Command in excess of your database interactions.