[英]how to sort datas based on the key in dictionary in C#
I am using dictionary to collect some information. 我正在使用词典收集一些信息。 After I collect the details I need to sort the dictionary values based on the key using var Variable.
收集详细信息后,需要使用var Variable根据键对字典值进行排序。 After that I need to insert the sorted var variable to the new dictionary.
之后,我需要将排序后的var变量插入到新字典中。 Here, I have trouble to insert the sorted data into dictionary.
在这里,我很难将排序后的数据插入字典中。
I'm posting my code Here: 我在这里发布我的代码:
var orderDic = from dic in dictionaryColl
orderby dic.Key ascending
select dic;
Dictionary<int, string> newDic = new Dictionary<int, string>();
newDic =(Dictionary<int,string>)orderDic; // Here i'm not able to assign data to dictionary
Thanks in Advance.. 提前致谢..
You can directly convert it to dictionary like: 您可以将其直接转换为字典,例如:
Dictionary<int, string> newDic = (from dic in dictionaryColl
orderby dic.Key ascending
select dic)
.ToDictionary(r => r.Key, r => r.Value);
Or with method syntax: 或使用方法语法:
Dictionary<int, string> newDic = dictionaryColl
.OrderBy(r => r.Key)
.ToDictionary(r => r.Key, r => r.Value);
EDIT: OrderBy
would not effect the retrieval of Dictionary items in order. 编辑:
OrderBy
不会影响字典中订单项的检索。
See: Dictionary<TKey, TValue> Class
请参阅:
Dictionary<TKey, TValue> Class
For purposes of enumeration, each item in the dictionary is treated as a KeyValuePair structure representing a value and its key.
出于枚举目的,字典中的每个项目都被视为代表值及其键的KeyValuePair结构。 The order in which the items are returned is undefined.
返回项目的顺序是不确定的。
What you need is SortedDictionary like: 您需要的是SortedDictionary,例如:
SortedDictionary<int, string> sortedNewDic =
new SortedDictionary<int, string>(dictionaryColl);
You just need 您只需要
newDic = orderDic.ToDictionary(x=> x.Key, x => x.Value);
However this will not really help much as the order by clause won't affect the dictionary order. 但是,这实际上并没有多大帮助,因为order by子句不会影响字典的顺序。
It's possible you want a SortedDictionary ? 您可能需要SortedDictionary吗?
new Dic = new SortedDictionary(dictionaryColl);
为什么不首先使用SortedDictionary( http://msdn.microsoft.com/zh-cn/library/f7fta44c.aspx )?
newDic =(Dictionary<int,string>).OrderBy(l => l.ColName).ToList();
其中ColName
是您要应用排序或排序的列的名称。
You can use 您可以使用
var _ordered = _dic.OrderBy(d => d.key).ToDictionary(d => d.Key, d => d.Value);
method to order the dictionary in ascending order. 字典升序排序的方法。
or 要么
you can use 您可以使用
var _ordered = _dic.OrderByDescending(d => d.key).ToDictionary(d => d.Key, d => d.Value);
method to order the dictionary in descending order. 字典降序排序的方法。
Or else if you want to replace the same dictionary then 否则,如果您要替换同一词典,则
var _ordered = _dic.OrderByDescending(d => d.key).ToDictionary(d => d.Key, d => d.Value);
in case your original Dictionary is _dic 如果您的原始词典是_dic
_dic=new Dictionary<int, string>(_ordered);
Please go through the following code, 请检查以下代码,
class Program
{
static void Main(string[] args)
{
Dictionary<int,string> _dic=new Dictionary<int,string>();
_dic.Add(5,"xyz");
_dic.Add(2,"abc");
_dic.Add(1,"pqr");
_dic.Add(4,"test");
_dic.Add(3,"pvf");
var _ordered=_dic.OrderBy(d => d.Key).ToDictionary(d=> d.Key,d=>d.Value);
_dic=new Dictionary<int,string>(_ordered);
}
}
You can debug the above application and check that _dic is having the sorted dictionary based on the key. 您可以调试上面的应用程序,并检查_dic是否具有基于键的排序字典。
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