5 Simple Techniques For dapper tutorial for beginners

5 Simple Techniques For dapper tutorial for beginners

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The very first thing we are going to do is to produce a new Dto folder, and within it, a different CompanyForCreationDto class that we are going to use for your Publish request:

The model is a set of classes to communicate with the databases. Now let's increase an entity class Shopper while in the Product folder.

QueryMultiple – an extension method that executes a number of queries in the exact command and maps benefits

Now, we are going to handle a Write-up ask for inside our API and make use of the ExecuteAsync system to create a new company entity during the databases.

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QuerySingleOrDefault – executes a query and maps The end result or maybe a default value In the event the sequence is empty. It throws an exception if there is multiple factor within the sequence

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Obviously, When you have asked Dapper to return a selected form, similar to the Consumer inside the sample code shown right before, you should have the requested item returned in place of “Row”.

QuerySingle – an extension strategy that executes a query and maps the result. It throws an exception if there is not exactly one ingredient during the sequence

Now, dapper tutorial for beginners we have to determine the relationship string of our databases, so that the appliance can connect with our Database for doing CRUD functions. Open up up the appsettings.json file within the Dapper.WebApi Undertaking and insert the following

This is very concise and clean up, nonetheless it doesn’t enable to specify if a parameter is definitely an enter or output parameter, and the data style is inferred with the parameter sort alone. Listed here’s what get executed on the databases:

If you wish to learn how to make a entirely-fledged Repository Pattern, you may browse our posting on that subject matter. Also, you'll find the async version of it in order to compose it like that.

1 good function that you have when using nameless objects as parameters is the opportunity to pass an IEnumerable. This is helpful just in case you ought to pass a list of values for use within a IN construct: can just go an IEnumerable as parameter worth, and also the values will be quickly expanded to your comma-separated listing of values.

When speaking about these extension solutions, we have to say that Dapper supports synchronous and asynchronous technique executions. We’ll use the asynchronous version of These techniques.