c# - 选择具有相同ID的多行

Question

我的“订单”表如下所示：

orderId     CustomerName
1           customer1
2           customer2
3           customer1
4           customer1

我的代码只有一个 orderId

SqlCommand command = new SqlCommand("SELECT orderId FROM orders WHERE CustomerName='"+name+"'", connection);

SqlDataReader reader = command.ExecuteReader();

if (reader.Read()){
    MyOrders order1 = new MyOrders(reader.GetInt32(0));
    orders.Add(order1);
}
return orders.ToArray();

如何使用 customer1 获取所有 orderId 1、3、4？

Answer 1

使用循环添加所有订单。像这样

while (reader.Read())
{
    MyOrders order1 = new MyOrders(reader.GetInt32(reader("orderId")));
    orders.Add(order1);
}