CODEWITHSUNDEEP
c#sortedlist
user1890688
user1890688

Reputation: 61

How C# SortedList get key by value?

There is a SortedList 

slLanguage = new SortedList();
slLanguage.Add("Bahasa","id-ID");
slLanguage.Add("Chinese Simplified(中文简体)","zh-CN");
slLanguage.Add("Chinese Traditional(中文繁體)","zh-TW");      
slLanguage.Add("Kazakh","kk-KZ");
slLanguage.Add("Russian(русский)","ru-RU");
slLanguage.Add("Vietnamese(Việt)","vi-VN");
slLanguage.Add("English", "en-US");

How can I get the key by value?

For example: Get the item key "zh-CN"

Upvotes: 6

Views: 11425

Answers (3)

Ira
Ira

Reputation: 764

Looking the key from Value would be not efficient and defeats the purpose of sorted List. Sorted list is really a sorted Dictionary named confusingly as SortedList.

Upvotes: 0

Picrofo Software
Picrofo Software

Reputation: 5571

If you would like to get the key from a value, you may use SortedList.IndexOfValue(object value) to get the index of the value you specify. Then, use SortedList.GetKey(int index) to return a key as object from the value's index we just gathered.

Example

SortedList slLanguage = new SortedList(); //Initializes a new SortedList of name slLanguage
//Add the keys and their values to the list
slLanguage.Add("Bahasa", "id-ID");
slLanguage.Add("Chinese Simplified(中文简体)", "zh-CN");
slLanguage.Add("Chinese Traditional(中文繁體)", "zh-TW");
slLanguage.Add("Kazakh", "kk-KZ");
slLanguage.Add("Russian(русский)", "ru-RU");
slLanguage.Add("Vietnamese(Việt)", "vi-VN");
slLanguage.Add("English", "en-US");
//
object returnedKey = slLanguage.GetKey(slLanguage.IndexOfValue("zh-CN")); //Gets the key from zh-CN as returnedKey of type object

Thanks,
I hope you find this helpful :)

Upvotes: 12

Ayush
Ayush

Reputation: 42450

There's probably a better way to do this, but here's one way to do it:

int index = slLanguage.IndexOfValue("zh-CN");
var item = slLanguage.GetKey(index);

Upvotes: 1

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