Category: C#

Dapper Query<T1,T2,TReturn>() implements one‑to‑one table join mapping Example 1. Entity Class Definition 2. Query Implementation Multi‑table JOIN relational query

Dapper Multi‑Statement Operations with QueryMultiple Example Parameter‑Based Multi‑Statement Query Multi‑statement Operations

Example Both parameter formats work Bulk Delete Multi‑condition IN Query IN Query

Create MySQL Stored Procedure Call the Stored Procedure Stored Procedure Returning Result Sets Use .Query<T>() when your stored procedure returns query data Dapper Stored Procedures

Original note: Entity deletion generally relies on a unique Id; core SQL pattern: DELETE … WHERE PrimaryKey=Value The example below is vulnerable to SQL injection Standard Parameterized Implementation Pass Parameters …

Original note: The update workflow is similar to inserts; write your UPDATE SQL and add a WHERE clause so only target rows get modified. Example Standard Parameterized Implementation Partial‑field Only …

Dapper Insert Operations Example Notes Retrieve Auto‑Increment Primary Key ID for New Records (MySQL) If the student table has an auto‑increment primary key Id, fetch the ID of the newly‑added …

Dapper supports many databases. We will use MySQL as our example here. You need to have MySQL installed on your system beforehand. Once MySQL is installed, create a new database. …

1. What Is Dapper Dapper is a .NET Micro ORM, widely known as the “King of Micro ORMs”, delivering performance close to raw ADO.NET. ORM: Object‑Relational Mapper, handles automatic mapping …