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c# dictionary get key by value

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YOU.com answered on April 23, 2020 Popularity 8/10 Helpfulness 3/10

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c# dictionary get key by value

Comment

public static List<TKey> GetKeysByValue<TKey, TValue>(Dictionary<TKey, TValue> dictionary, TValue value)
{
    List<TKey> keys = new List<TKey>();
    
    foreach (var pair in dictionary)
    {
        if (pair.Value.Equals(value))
        {
            keys.Add(pair.Key);
        }
    }
    
    return keys;
}

// Example usage:
Dictionary<int, string> dictionary = new Dictionary<int, string>
{
    { 1, "apple" },
    { 2, "banana" },
    { 3, "orange" }
};

string searchValue = "banana";
List<int> keys = GetKeysByValue(dictionary, searchValue);

// Print the keys
foreach (var key in keys)
{
    Console.WriteLine(key);
}

Popularity 8/10 Helpfulness 3/10 Language csharp

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Contributed on Sep 12 2023

YOU.com

0 Answers Avg Quality 2/10

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c# dictionary get value by key

Comment

 Dictionary<string, string> dict = new Dictionary<string, string>();
 dict.Add("UserID", "test");
 string userIDFromDictionaryByKey = dict["UserID"];

Popularity 10/10 Helpfulness 4/10 Language csharp

Source: stackoverflow.com

Tags: c# c

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Contributed on Apr 23 2020

Tense Turtle

0 Answers Avg Quality 2/10

get key value from object c#

Comment

Type myType = myObject.GetType();
IList<PropertyInfo> props = new List<PropertyInfo>(myType.GetProperties());

foreach (PropertyInfo prop in props)
{
    object propValue = prop.GetValue(myObject, null);

    // Do something with propValue
}

Popularity 10/10 Helpfulness 4/10 Language csharp

Source: stackoverflow.com

Tags: c# c

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Contributed on Jan 06 2021

Relieved Ray

0 Answers Avg Quality 2/10

get key in dictionary c#

Comment

public static string GetKeyFromValue(string valueVar)
{
   foreach (string keyVar in dictionaryVar.Keys) 
   { 
      if (dictionaryVar[keyVar] == valueVar)
      {
         return keyVar;
      }
   }
   return null;
}

Popularity 10/10 Helpfulness 3/10 Language csharp

Source: stackoverflow.com

Tags: c# c

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Contributed on Nov 05 2021

Nasty Nightingale

0 Answers Avg Quality 2/10

get a value from dictionary c#

Comment

// Declare and initialize a dictionary
Dictionary<string, int> myDictionary = new Dictionary<string, int>();

// Add some key-value pairs to the dictionary
myDictionary.Add("apple", 5);
myDictionary.Add("banana", 10);
myDictionary.Add("orange", 8);

// Retrieve a value from the dictionary using a specific key
string key = "banana";
if (myDictionary.ContainsKey(key))
{
    int value = myDictionary[key];
    Console.WriteLine("Value for key '{0}': {1}", key, value);
}
else
{
    Console.WriteLine("Key '{0}' does not exist in the dictionary.", key);
}

Popularity 9/10 Helpfulness 3/10 Language csharp

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Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

c# dictionary get key by value

Comment

            Dictionary<string, string> dict = new Dictionary<string, string>()
              {
                {"1", "one"},
                {"2", "two"},
                {"3", "three"}
              };
            foreach (var item in dict)
            {
                if(item.Value == "One")
                {
                    var firstElementKey = item.Key;
                  	Console.WriteLine(firstElementKey);
                }
            }

Popularity 10/10 Helpfulness 3/10 Language csharp

Source: Grepper

Tags: c# c

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Contributed on Jun 20 2022

Yanislav Ivanov

0 Answers Avg Quality 2/10

dictionary get value by key c#

Comment

Dictionary<string, string> myDictionary = new Dictionary<string, string>();
myDictionary.Add("key1", "value1");
myDictionary.Add("key2", "value2");

string key = "key2";
if (myDictionary.ContainsKey(key))
{
    string value = myDictionary[key];
    Console.WriteLine("Value for key '{0}': {1}", key, value);
}
else
{
    Console.WriteLine("Key '{0}' does not exist in the dictionary.", key);
}

Popularity 8/10 Helpfulness 2/10 Language csharp

Source: Grepper

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Contributed on Sep 12 2023

YOU.com

0 Answers Avg Quality 2/10

c# dictionary get key by value

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c# dictionary get value by key

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