小编Ift*_*har的帖子

我使用CRM 2011 RC(v5)LINQ-to-CRM提供程序编写了一个Linq to CRM查询.我有一个本地声明的List <T>,我想加入CRM实体,我希望查询在CRM服务器上执行.一个例子可能有帮助:

MyObject myObject = new MyObject();
List<myAccount> myAccountsList = new List<myAccount>();

myAccountsList.Add(new myAccount() {AccountNumber = "123"};
myAccountsList.Add(new myAccount() {AccountNumber = "456"};

myObject.ListOfAccounts = myAccountsList;

var accountsQuery = from ax in myObject.ListOfAccounts
                    join a in orgContext.CreateQuery<customAccountEntity>() on ax.AccountNumber equals a.account_number
                    select a;

foreach(var item in accountsQuery)
{
    Console.WriteLine("Id of record retrieved: " + a.Id.ToString());
}

上面的代码编译并执行,但是,在检索整个CRM实体记录集之后,本地执行记录的过滤.显然,当CRM实体包含数千行时,查询将执行不佳甚至超时.

我已阅读有关IQueryable和IEnumerable的内容,并尝试使用AsQueryable()扩展方法转换List,该方法无效.我需要上面的Linq查询来运行SQL,如下所示:

SELECT a.*
FROM customAccountEntity AS a
WHERE a.account_number IN ('123', '456');

如果想要加入多个字段,可以使用临时表.我怎么能做到这一点？