C＃中One Key值字典的多个值？ [英] multiple values for One Key values dictionary in C#?

问题描述

我有一个Address对象在这个对象我有地址线。我的问题是我想为相同的键添加不同的值。这个对象可以有多个地址，所以我需要添加地址的属性作为键和值作为字典中的值。

假设地址对象有...

 城市： Kanpur 
状态：UP 
  

而在第二个地址对象中有

 城市：Rajsthan 
州：MP 
  

现在我如何将它添加到通用集合中。

我已经尝试过下面的代码。但没有得到什么是正确的方法。

  foreach（entity.Addresses中的var objAddress）
 {
 ds =新字典< string，string> ;（）; 
 ds.Add（City，（objAddress.City == null）？：objAddress.City）; 
 ds.Add（State，（objAddress.State == null）？：objAddress.State.ToString（））; 
 lsb.Add（ds.ToString（））; 
} 
  

解决方案

只需使用 Dictionary< string，List< Address>> 。

添加到该词典时，如果给定的键还没有包含一个值，添加包含该地址的新的列表< Address> 。

如果给定的键包含一个值，简单地添加新的地址到列表 。

I have an Address object in this object I have address lines. My problem is that I want to add different values for same keys. This object can have multiple addresses so I need to add property of address as key and value as value in a dictionary.

suppose object of address one have...

City : Kanpur 
State:UP

and in second object of address have

City : Rajsthan 
State:MP

now how can I add it in a generic collections.
I have tried below code. but not getting what is right approach.

foreach (var objAddress in entity.Addresses)
{                  
     ds = new Dictionary<string, string>();                           
     ds.Add("City", (objAddress.City == null) ? "" : objAddress.City);
     ds.Add("State", (objAddress.State == null) ? "" : objAddress.State.ToString());
     lsb.Add(ds.ToString());
}

解决方案

Just use a Dictionary<string, List<Address>>.

When adding to that Dictionary, if a given key doesn't yet contain a value, add a new List<Address> that contains that address.

If the given key does contain a value, simply Add the new Address to that List.

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