使用交易

此示例使用 SqlConnection，但支持任何 IDbConnection。

此外，相关的 IDbConnection 还支持任何 IDbTransaction。

public void UpdateWidgetQuantity(int widgetId, int quantity)
{
    using(var conn = new SqlConnection("{connection string}")) {
        conn.Open();

        // create the transaction
        // You could use `var` instead of `SqlTransaction`
        using(SqlTransaction tran = conn.BeginTransaction()) {
            try
            {
                var sql = "update Widget set Quantity = @quantity where WidgetId = @id";
                var parameters = new { id = widgetId, quantity };

                // pass the transaction along to the Query, Execute, or the related Async methods.
                conn.Execute(sql, parameters, tran);

                // if it was successful, commit the transaction
                tran.Commit();
            }
            catch(Exception ex)
            {
                // roll the transaction back
                tran.Rollback();

                // handle the error however you need to.
                throw;
            }
        }
    }   
}