请解释此Linq查询 [英] Explain this Linq query please

问题描述

你好，
任何人都可以解释一下此msdn链接中给出的以下LINQ查询.
查询是:

Hi there,
Can any one please explain the following LINQ query given in this msdn link.
The query is:

public void Linq19()
{
    List<Customer> customers = GetCustomerList();
    var customerOrders =
        customers.SelectMany(
            (cust, custIndex) =>
            cust.Orders.Select(o => "Customer #" + (custIndex + 1) +
                                    " has an order with OrderID " + o.OrderID));
    ObjectDumper.Write(customerOrders);
}

http://msdn.microsoft.com/en-us/vcsharp/aa336758#SelectSimple1 [ ^ ]

http://msdn.microsoft.com/en-us/vcsharp/aa336758#SelectSimple1[^]

推荐答案

以下是SelectMany如何工作的说明.
http://www.codethinked.com/a-visual-look-at- the-linq-selectmany-operator [ ^ ]
希望对您有所帮助.

Here is the explanation how SelectMany works.
http://www.codethinked.com/a-visual-look-at-the-linq-selectmany-operator[^]
I hope this would help.

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