5 Simple Techniques For dapper tutorial for beginners

5 Simple Techniques For dapper tutorial for beginners

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In this section, we're going to make a very simple repository sample. We’ll help it become uncomplicated for the reason that this article is about Dapper.

Develop an entity or model class of Consumer kind, this entity will likely be mapped to the Customers table in the databases.

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Processes incoming requests, manipulates data utilizing the design, and renders the ultimate output for that look at.

Swagger is the favorite API screening Resource for almost just about every developer. It tends to make your lifetime really easy. Let’s incorporate swagger to our WebApi and exam our implementation up to now.

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

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community class Employee community int Id get; established; general public string Title get; established; public int Age get; established; public string Position get; established; community int CompanyId get; established;

Certainly, if you have questioned Dapper to return a certain variety, much like the User in the sample code revealed in advance of, you'll have the requested item returned as an alternative to “Row”.

QuerySingle – an extension approach that executes a query and maps the result. It throws an exception when there is not particularly just one factor within the sequence

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

Transactions are fairly uncomplicated to work with with Dapper. We can execute it using the Dapper library (the just one we already use) or perhaps the Dappr.Transaction library, which is identical factor as Dapper, just Along with the extended IDbConnection interface. Inside our instance, we're going to utilize the Dapper library.

var sql = @"pick * from cars and trucks the place Id = @id1; pick out * from cars the place Id = @id2; find * from cars in which Id = @id3";

In any case, Which means that if You simply need a single row otherwise you’re anticipating just one row, there's no place in loading every thing in memory, and only then using the 1st row or examining if you bought exactly just one row, appropriate? That’s why the solutions furnished by Dapper ought to be desired. They may just choose one row, with out loading each of the Some others in memory. It could appear to be an dapper tutorial for beginners exceedingly small thing, but are those kind of details which make general performance great instead of just good.

Simplicity: Dapper provides a straightforward and intuitive API for executing queries and mapping final results. It enables you to write SQL queries specifically, providing you with complete control about your databases interactions.