Get all keys from dictionary c#
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WebSep 22, 2012 · var selectedValues = keysToSelect.Where (dictionary1.ContainsKey) .Select (x => dictionary1 [x]) .ToList (); If all the keys are guaranteed to be in the dictionary you can leave out the first Where: var selectedValues = keysToSelect.Select (x => … WebSep 14, 2012 · IEnumerable> enumerable = testData as List> ?? testData .ToList (); foreach (Dictionary objects in enumerable) { IEnumerable values = objects.Select (x => x.Value); // To get the values. IEnumerable keys = objects.Select (x => x.Key); // To get the …WebHow do I get a Dictionary key by value in C#? Dictionary types = new Dictionary () { {"1", "one"}, {"2", "two"}, {"3", "three"} }; I want something like this: getByValueKey (string value); getByValueKey ("one") must be return "1". What is the best way do this? Maybe HashTable or SortedLists? c# dictionary ShareWebFeb 15, 2024 · My problem is, that we needed an additional value in the dictionary so we changed Dictionary to Dictionary. When i use except now, i don't get the result i'd like to. Example:WebNov 4, 2016 · So the string should be the key in your dictionary, not the double. Dictionary dictionary = new Dictionary (); This allow you to get a specific double value by providing the right string: var percentage = dictionary ["Gulborgsund"]; Since the lookup will be based on user input (which is usually …WebDec 20, 2024 · How to get all keys of a dictionary with C#. Dictionary AuthorList = new Dictionary (); AuthorList.Add ("Mahesh Chand", 35); …WebMy current objective is to foreach or simply read all values from MajorCommands into a Dictionary formatted as Dictionary. I've tried several different approaches using System.Configuration but none seem to work and I haven't been able to find any details out there for my exact question.WebMar 29, 2016 · I'm using C# and Json.NET. If I have a JObject, I want a list of the keys within the object, similar to how object.Keys() returns the keys within the object. This seems like it'd be obvious, but I'm having a rough time finding a way to do this. Edit: I'm traversing through the object, and I want to spit out all the keys in the object as I go ...WebMar 16, 2024 · We created the dictionary types and iterated through types with a foreach loop to find the key associated with the value one.We used the foreach loop to iterate …
Get all keys from dictionary c#
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WebOct 24, 2024 · 2 Answers Sorted by: 8 One possible approach: var result = doublechek .GroupBy (z => z.Value) .Where (z => z.Count () > 1) .SelectMany (z => z) .Select (z => z.Key) .ToList (); GroupBy and Count will get only those with duplicates. SelectMany and Key will get the keys of those with duplicates (i.e. 2 and 3). Share Follow Web2 days ago · Since the copy of the dictionary is made while the lock is held there should be no risk that the dictionary is read and written to concurrently. And concurrent reads are safe: A Dictionary can support multiple readers concurrently, as long as the collection is not modified
WebOct 13, 2011 · 7. The code you've given should work absolutely fine, assuming you really wanted to find entries where the value had a partial match. If you're seeing something else, I suspect your diagnostics are flawed. If you wanted to find entries where the key had a partial match, you just want to swap. a.Where (d => d.Value.Contains (text)) WebC# // To get the keys alone, use the Keys property. Dictionary.KeyCollection keyColl = openWith.Keys; // The elements of the KeyCollection are …
WebThis post will discuss how to get all Dictionary keys having some value in C#. 1. Using Where() method. We can use the Where() method to filter a dictionary based on a … WebHow do I get a Dictionary key by value in C#? Dictionary types = new Dictionary () { {"1", "one"}, {"2", "two"}, {"3", "three"} }; I want something like this: getByValueKey (string value); getByValueKey ("one") must be return "1". What is the best way do this? Maybe HashTable or SortedLists? c# dictionary Share
WebApr 14, 2024 · Method 2: Using Split () and Distinct () Another way to remove duplicate words from a string in C# is to use the Split () method to split the string into an array of …
WebMay 27, 2024 · You can sort dictionary by using OrderBy (for find min value) or OrderByDescending (for max value) then get first element. It also help when you need find second max/min element Get dictionary key by max value: double min = results.OrderByDescending (x => x.Value).First ().Key; Get dictionary key by min value: middletown ct soccer clubWebJun 30, 2013 · 2 Answers Sorted by: 4 Use the Microsoft.Win32.Registry object: private Dictionary GetRegistrySubKeys () { var valuesBynames = new Dictionary (); const string REGISTRY_ROOT = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"; //Here I'm looking under … middletown ct rfpWebJul 20, 2009 · var distinctKeys = theDictionary.Keys; This uses the Dictionary.Keys property. If you need a list, you can use: var dictionaryKeysAsList = theDictionary.Keys.ToList (); Since it's a dictionary, the keys will already be distinct. middletown ct social security office numberWebAug 11, 2014 · 2 Answers Sorted by: 13 You can use Where on your Dictionary instead of the Keys collection then get the values with Select: mapData.Where (kvp => kvp.Key.Contains (pattern)).Select (kvp => kvp.Value); Share Improve this answer Follow edited Aug 11, 2014 at 14:12 Rawling 48.8k 7 89 127 answered Aug 11, 2014 at 14:01 … newspaper\u0027s meWebFeb 15, 2024 · My problem is, that we needed an additional value in the dictionary so we changed Dictionary to Dictionary. When i use except now, i don't get the result i'd like to. Example: newspaper\u0027s mdWebThis post will discuss how to get all Dictionary keys having some value in C#. 1. Using Where()method We can use the Where()method to filter a dictionary based on a predicate. The following code example demonstrates how we can use Where()with Select()method to fetch all the dictionary keys having a value of 2. middletown ct ss officeWebNov 4, 2016 · So the string should be the key in your dictionary, not the double. Dictionary dictionary = new Dictionary (); This allow you to get a specific double value by providing the right string: var percentage = dictionary ["Gulborgsund"]; Since the lookup will be based on user input (which is usually … middletown ct snow