![]() This stored procedure returns a set of rows. In the example above, the ProductDataProvider class has the GetProducts method that passes a stored procedure named “GetProducts” to Dapper. NET layer, which basically contains a set of extension methods to the SqlConnection class. ![]() Public async Task UpdateProduct(Product product)ĭapper is built on top of the ADO. Return await sqlConnection.QuerySingleOrDefaultAsync ( Var dynamicParameters = new product.CategoryId) ĬommandType: CommandType.StoredProcedure) Using (var sqlConnection = new SqlConnection(connectionString)) Public async Task AddProduct(Product product) Private readonly string connectionString = "Server=localhost Database=Tutorial Trusted_Connection=True " Public class ProductDataProvider : IProductDataProvider Here is an example of a Data Access Layer class. ![]() ![]() Next, we can create a class that serves as a Data Access Layer, which will use the Dapper library. NET Core is easy using the template in Visual Studio 2017.Īfter the library is installed, we can see that Dapper is a collection of function extensions of the SqlConnection class. Setting Up Our CRUD AppĬreating the Rest API with ASP. And since a micro ORM like Dapper doesn’t actually do the object (graph) mapping itself, we are given a lot of flexibility in this aspect. This allows us to fine tune the performance, unlike in Entity Framework. With a micro ORM like Dapper, we have more control over the SQL executed by the database, as well as how the object graph is constructed. The main reason is performance and flexibility. Choosing a Data Access Layer Frameworkįor the data access layer, we chose Dapper, a lightweight/micro ORM framework over a more heavyweight ORM framework like Entity Framework. The IDE used was Visual Studio Community 2017. This tutorial is part one of the series on creating a CRUD application using Dapper for the data access layer, ASP.Net Core for the Rest API layer, Angular 2 for the front end, and SQL Server for the database. For the frontend, where the focus is on interaction with the user, the most common frameworks today are Angular and React. For the backend, which typically handles requests from the frontend, common technology options include Node.js, Python, or the ASP. ![]() A modern web application is usually split into two parts, namely the frontend and backend, where each part has its own focus. ![]()
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