using System.Data.SqlClient; using System.Data; public class SqlDbHelper : IDbHelper { private SqlConnection conn; public SqlDbHelper(string connectionString) { conn = new SqlConnection(connectionString); conn.Open(); } public IDbTransaction BeginTransaction() { return conn.BeginTransaction(); } //...other methods }
using MySql.Data.MySqlClient; using System.Data; public class MySqlDbHelper : IDbHelper { private MySqlConnection conn; public MySqlDbHelper(string connectionString) { conn = new MySqlConnection(connectionString); conn.Open(); } public IDbTransaction BeginTransaction() { return conn.BeginTransaction(); } //...other methods }Package/Library: The package or library used for these examples will depend on the specific database provider being used. For example, the `System.Data.SqlClient` namespace is used for SQL Server, while `MySql.Data.MySqlClient` is used for MySql. The IDbHelper interface and its implementation are custom code that may be part of a larger application or library.