How To sort Dictionary After Adding data to it (C#)

Question

Hello Everyone my problem is when i add the data to Dictionary in c# and i want to switch (Sortype) string to check how the user wants the order data like this:

                         string SortType="ByDownloads";
                         Dictionary<string, Data> WorldInfo = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
                            switch (SortType)
                            {
                                case "ByDownloads":
                                    WorldInfo.OrderByDescending(AllData => AllData.Value.PostDownloads).ToList();
                                    break;
                                case "ByViews":
                                    WorldInfo.OrderBy(AllData => AllData.Value.PostViews).ToList();
                                    break;
                            }

In this way, the code Will Not work and the Data does not sorted but when i use this way the code will work:

Dictionary<string, Data> WorldInfo = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
var NewSortedDictionary = WorldInfo.OrderByDescending(AllData => AllData.Value.PostViews).ToList();

So I'm looking for the right way to do it and use (WorldInfo) Dictionary and switch (SortType) then i use it instead of (NewSortedDictionary). Thank you :)

But.. you set Sortype to a value that doesn't then appear in the switch statement — Caius Jard
– Caius Jard, Commented Sep 25, 2021 at 19:19
Thanks for your reply, I was wrong about some things, I updated the code to see where the problem is — OLIVER
– OLIVER, Commented Sep 25, 2021 at 20:53
Avoid confusing yourself - you cannot sort a Dictionary<T,U> - what you're doing is enumerating and sorting the content of the dictionary and storing into a list of key value pairs and calling it a dictionary; it isn't, so you shouldn't — Caius Jard
– Caius Jard, Commented Sep 25, 2021 at 21:58

OLIVER · Accepted Answer · 2021-10-04 20:06:04Z

1

Thanks For Everyone Who Comment on this Question :) i fixed it using this way,i hope it help someone in the future:

            SortType="ByDownloads";
            Dictionary<string, Data> NormallDictionary = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
            List<KeyValuePair<string,Data>> MySortedDictionary=  new List<KeyValuePair<string, Data>>();
            switch (SortType)
            {
                case "ByDownloads":
                MySortedDictionary = NormallDictionary.OrderByDescending(x => x.Value.Downloads).ToList();
                break;
                case "ByViews":
                MySortedDictionary = NormallDictionary.OrderByDescending(x => x.Value.Views).ToList();
                break;
            }

Now You Can Use MySortedDictionary as You Want

edited Oct 4, 2021 at 20:06

answered Oct 4, 2021 at 19:58

OLIVER

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Comments

Akshay Bheda · Accepted Answer · 2021-09-25 19:19:58Z

0

The reason it does not work in your case is because OrderByDescending returns an object after ordering.

You can do something like this

        Dictionary<string, Data> MyDictionary = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString()));
        var data = Sortype == "ByViews" ? WorldInfo.OrderByDescending(AllData => AllData.Value.WorldPDownloads).ToList() : Sortype == 'ByDownloads' ? WorldInfo.OrderBy(AllData => AllData.Value.WorldPDownloads).ToList() : null;

Or

        string Sortype = "ByDate";
        Dictionary<string, Data> MyDictionary = JsonConvert.DeserializeObject<Dictionary<string, Data>>(Res.Body.ToString());
        switch (Sortype)
        {
            case "ByViews":
                WorldInfo = WorldInfo.OrderByDescending(AllData => AllData.Value.WorldPDownloads).ToList();
                break;
            case "ByDownloads":
                WorldInfo =WorldInfo.OrderBy(AllData => AllData.Value.WorldPDownloads).ToList();
                break;
        }

answered Sep 25, 2021 at 19:19

Akshay Bheda

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4 Comments

OLIVER Over a year ago

Thanks for your reply :), I was wrong about some things, I updated the code to see where the problem is i just want to use (WorldInfo) Dictionary and switch sorttype then i use it instead of (NewSortedDictionary)

Akshay Bheda Over a year ago

Can you elaborate more on what you are doing now and what do you expect?

Akshay Bheda Over a year ago

@CaptainPrice If you think this answer was correct, mark it as well. future users might benefit from this

OLIVER Over a year ago

Thank you for your attention to this issue, I fixed it I wish you a happy life :)

Stephanos B. · Accepted Answer · 2021-09-25 19:35:12Z

0

I do not know if that is a bug or just missing on purpose but you are setting string Sortype ="ByDate"; without actually having a "ByDate" in the switch statement.

answered Sep 25, 2021 at 19:35

Stephanos B.

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3 Comments

OLIVER Over a year ago

Thanks for your reply , (ByDate) its just a public string in Data Class but the problem when i try to sort Dictionary

Stephanos B. Over a year ago

As a temporary solution you could try extracting the data into a separate List before ordering: var tempList = WorldInfo.Select(AllData => AllData.Value.PostDownloads).ToList(); tempList.OrderByDescending(o => o); That being said, it is strange that you method does not work, what exactly is the input and what is the expected incorrect output?

OLIVER Over a year ago

Thank you for your response, I made some changes and it works now :) , happy coding

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