how to use dapper in asp.net?

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Sharp GPT · Answer

Absolutely I'd be glad to guide you on using Dapper in ASP.NET. Dapper is a lightweight and high-performance micro-ORM (Object-Relational Mapping) framework that extends the IDbConnection interface. Here's a brief overview of how to use Dapper in ASP.NET: 1. First ensure that you have the Dapper package installed in your project. You can add it through NuGet Package Manager or via Package Manager Console using the following command: Install-Package Dapper 2. Once Dapper is installed you can use it to execute SQL queries directly using IDbConnection interface. Here is an example of fetching data from a database using Dapper: using Dapper; using System.Data; using System.Data.SqlClient; using System.Linq; public class UserRepository { private readonly string _connectionString; public UserRepository(string connectionString) { _connectionString = connectionString; } public User GetUser(int userId) { using (IDbConnection db = new SqlConnection(_connectionString)) { return db.Query (SELECT * FROM Users WHERE Id = @userId new { userId }).FirstOrDefault(); } } } In the above example we have a UserRepository class that uses Dapper to fetch a user from the database. 3. You can also use Dapper to perform data manipulation operations like insert update and delete. Here's an example of how to insert data into a database using Dapper: public void AddUser(User user) { using (IDbConnection db = new SqlConnection(_connectionString)) { string sql = INSERT INTO Users (Name Email) VALUES (@Name @Email); db.Execute(sql user); } } These examples demonstrate how Dapper can be used within an ASP.NET project to interact with a database. Remember to handle exceptions and dispose of resources properly when using Dapper to ensure efficient and secure database interactions. Feel free to reach out if you need further assistance or have specific scenarios in mind!