我怎样才能做一个linq

Question

 var adreees = Variables.PolicyCustomerAddresses;
 var linq= Enumerable.From(adreees)
                .Where(linq.CUSTOMER_ADRESS_ID === correspondenceAdress && linq.CUSTOMER_ID === customerCode)
                .DefaultIfEmpty(null)
                .First();

adreees 是一个数组，它包含 3 个索引，我想获取 CUSTOMER_ADRESS_ID === correspondenceAdress && linq.CUSTOMER_ID === customerCode 索引的值。

Answer 1

您需要使用$ 作为实际数组的占位符，并且需要将条件写为字符串。

var adreees = [{ CUSTOMER_ADRESS_ID: 1, CUSTOMER_ID: 17, name: 'foo' }, { CUSTOMER_ADRESS_ID: 2, CUSTOMER_ID: 17, name: 'bar' }, { CUSTOMER_ADRESS_ID: 3, CUSTOMER_ID: 17, name: 'baz' }],
    correspondenceAdress = 2,
    customerCode = 17,
    result = Enumerable.From(adreees)
        .Where("$.CUSTOMER_ADRESS_ID === correspondenceAdress && $.CUSTOMER_ID === customerCode")
        .DefaultIfEmpty(null)
        .First();

console.log(result);

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