using Except in sorting of dictionary

Question

@Jack J Jun , After creating a dictionary with the below declaration , i am sorting it in the descending order according to the number of values each keys hold .

   Dictionary<string, List<string>> dic = new Dictionary<string, List<string>>(StringComparer.CurrentCultureIgnoreCase);  

// insert some data here

           dic = dic.OrderByDescending(d => d.Value.Count).ToDictionary(x => x.Key, x => x.Value);    

Now, what I am trying to do is, exclude this sorting for some strings, from the list of string in the above same query. Can you please suggest me how to achieve the same in this query only.

Answer 1

@ankit goel , Welcome to Microsoft Q&A, you could try to use the Enumerable.Except Method to exclude your unwanted strings.

Here is a code example you could refer to.

 OrderedDictionary count = new OrderedDictionary();  
        count.Add("Other Model", 22);  
        count.Add("Infinx", 12);  
        count.Add("Apple", 23);  
        count.Add("Samsung", 23);  
        count.Add("test", 45);  
        count.Add("nokia", 34);  
        List<string> list = new List<string>();  
        list.Add("Samsung");  
        list.Add("Infinx");  
        list.Add("Other Model");  
        list.Add("Apple");  
        var exlist = new List<string>();  
        exlist.Add("Infinx");  
        list = list.Except(exlist).ToList();  
        foreach (var item in list)  
        {  
            foreach (var kvp in count.Cast<DictionaryEntry>().Reverse().Reverse())  
            {  
                if(item==kvp.Key.ToString())  
                {  
                    count.Remove(kvp.Key);  
                    count.Insert(list.IndexOf(item), kvp.Key, kvp.Value);  
                }  
            }  
        }  

Result:

Best Regards,
Jack

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Answer 2

in the ToDictionary, pass your own compare method as the third parameter. your method will need to know how to sort the desired excluded strings. do they come first, last, middle, etc. also what order should they be in?