帮助选择LinQ -C＃配对两个对象 [英] Help in Select with LinQ -C# pair two objects

问题描述

我有这样的结构：

 <   PrincipalObject  >  
 <   SecondObject  >  
 <   ThirdObject  >  
 <   fourthObject  >  
 <  标识符 >  B <   / identifier  >  
 <  金额 >  5.00 <   / amount  >  
 <  货币 >  EUR <   / Currency  >  
 <   / fourthObject  >  
 <   fourthObject  >  
 <  标识符 >  712 <   / identifier  >  
 <   a mount  >  49.51 <   / amount  >  
 <  货币 >  EUR <   / Currency  >  
 <   / fourthObject  >  
 <   / ThirdObject  >  
 <   / SecondObject  >  
 <   SecondObject  >  
 <   ThirdObject  >  
 <   fourthObject  >  
 <  标识符 >  B < span class =code-keyword><   / identifier  >  
 <  金额 >  7.00 < span class =code-keyword><   / amount  >  
 <  货币 >  EUR < span class =code-keyword><   / Currenc y  >  
 <   / fourthObject  >  
 <   fourthObject  >  
 <  标识符 >  712 <   / identifier  >  
 <  金额 >  51.51 <   /金额 >  
 <  货币 >  EUR <   /货币 >  
 <   / fourthObject  >  
 < span class =code-keyword><   / ThirdObject  >  
 <   / SecondObject  >  
 <   SecondObject  >  
 <   ThirdObject  >  
 <   fourthObject  >  
 <  标识符 >  B <   / identifier  >  
 <  金额 >  7.00 <   /金额 >  
 <  货币 >  EUR <   /货币 >  
 <   / fourthObject  >  
 <   fourthObject  >  
 <  标识符 >  712 <   / identifier  >  
 <  金额 >  51.51 <   / amount  >  
 <  货币 >  EUR <   / Currency  >  
 <   / fourthObject  >  
 <   / T hirdObject  >  
 <   / SecondObject  >  
 <   SecondObject  >  
 <   ThirdObject  >  
 <   fourthObject  >  
 <  标识符 >  B <   / identifier  >  
 <  金额 >  8.00 < span class =code-keyword><   / amount  >  
 <  货币 >  EUR < span class =code-keyword><   / Currency  >  
 <   / fourthObject  >  
 <   fourthObject  >  
 <  标识符 >  712 <   / identifier  >  
 <  金额 >  52.51 <   /金额 >  
 <  货币 >  EUR <   /货币 >  
 <   / fourthObject  >  
 <   / ThirdObject  >  
 <   / SecondObject  >  
 <  < span class =code-leadattribute> / PrincipalObject  >  

我想获得一个对象列表，它们的标识符为B，金额为51.51，标识符为712，金额为51.51。

我尝试

（来自 p   PrincipalObject.SecondObject 
 来自 s   p.ThirdObject.fourthObject 
 其中（s.identifier ==   B&& s.amount == 7.  00 ）&& 
（s.identifier ==   712&& s.amount == 51.  51 ）
 选择 s）。ToList（）; 

但这失败了
$ b $b¿我如何比较两个物体？

什么时候是B - >金额= 7

AND

什么时候是712 - >金额= 51.52

非常感谢

解决方案

  var  result = PrincipalObject.SecondObject.Select（p => p.ThirdObject.fourthObject）
 .Where（s => s.Any（x => x.identifier ==   B&& x.amount ==  7 。 00 ）&& s.Any（x => x.identifier ==   712&& x.amount ==  51 。 51 ））ToList（）; 

I have this structure:

<PrincipalObject>
	<SecondObject>
		<ThirdObject>
			<fourthObject>
			 <identifier>B</identifier>
			 <amount>5.00</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
			<fourthObject>
			 <identifier>712</identifier>
			 <amount>49.51</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
		 </ThirdObject>
		 </SecondObject>
	<SecondObject>
		<ThirdObject>
			<fourthObject>
			 <identifier>B</identifier>
			 <amount>7.00</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
			<fourthObject>
			 <identifier>712</identifier>
			 <amount>51.51</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
		 </ThirdObject>
	 </SecondObject>
	<SecondObject>
		<ThirdObject>
			<fourthObject>
			 <identifier>B</identifier>
			 <amount>7.00</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
			<fourthObject>
			 <identifier>712</identifier>
			 <amount>51.51</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
		 </ThirdObject>
	 </SecondObject>
	<SecondObject>
		<ThirdObject>
			<fourthObject>
			 <identifier>B</identifier>
			 <amount>8.00</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
			<fourthObject>
			 <identifier>712</identifier>
			 <amount>52.51</amount>
			 <Currency>EUR</Currency>
			 </fourthObject>
		 </ThirdObject>
	 </SecondObject>
 </PrincipalObject>

I want get a list of objects that they have the identifier "B" and amount 51.51, and identifier "712" and amount 51.51.
I try

(from p in PrincipalObject.SecondObject
         from s in p.ThirdObject.fourthObject
            where (s.identifier =="B" && s.amount ==7.00) &&
                 (s.identifier =="712" && s.amount ==51.51)
                  Select s).ToList();

But this fails
¿How I can compare two objects?
When is B -> amount = 7
AND
When is 712 -> amount = 51.52
Thank you very much

解决方案

var result = PrincipalObject.SecondObject.Select(p=>p.ThirdObject.fourthObject)
               .Where(s=>s.Any(x=>x.identifier =="B" && x.amount ==7.00) && s.Any(x=>x.identifier =="712" && x.amount ==51.51)).ToList();

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