Linked Questions
34 questions linked to/from Getting multiple keys of specified value of a generic Dictionary?
5
votes
4
answers
39k
views
Get key by value in hash table c# [duplicate]
I want to get the key of my value but this does not Possible in Hashtable
Is there data stretcher to do this ??
Hashtable x = new Hashtable();
x.Add("1", "10");
x.Add("2", "20");
x....
- 501
2
votes
0
answers
1k
views
Force all values in a dictionary to be unique? [duplicate]
I need to maintain a mapping between enum values, and a multi-value type (name+number). e.g.
ABC : {"john", 123}
DEF : {"paul", 234}
GHI : {"ringo", 345}
I planned to do this using a Dictionary of ...
- 64.5k
963
votes
37
answers
832k
views
String representation of an Enum
I have the following enumeration:
public enum AuthenticationMethod
{
FORMS = 1,
WINDOWSAUTHENTICATION = 2,
SINGLESIGNON = 3
}
The problem however is that I need the word "FORMS" ...
- 16k
522
votes
12
answers
920k
views
Get dictionary key by value
How do I get a Dictionary key by value in C#?
Dictionary<string, string> types = new Dictionary<string, string>()
{
{"1", "one"},
{"2", "two"...
- 13.1k
77
votes
6
answers
142k
views
Remove Item in Dictionary based on Value
I have a Dictionary<string, string>.
I need to look within that dictionary to see if a value exists based on input from somewhere else and if it exists remove it.
ContainsValue just says true/...
- 40.2k
26
votes
5
answers
77k
views
Get Dictionary key by using the dictionary value
How to get the dictionary key by using the dictionary value?
when getting the value using the key its like this:
Dictionary<int, string> dic = new Dictionary<int, string>();
dic.Add(1, "...
- 2,321
38
votes
5
answers
38k
views
What is an alternative to Dictionaries in C# that allows for duplicate keys?
I have a method that returns groups of technicians who have worked on certain projects, for example:
project 1 | John
project 1 | Tim
project 2 | John
project 2 | Dave
I originally tried to create a ...
- 16.7k
24
votes
3
answers
88k
views
LINQ: Getting Keys for a given list of Values from Dictionary and vice versa
I have the following structure in my code Dictionary<TKeys, TValues> data;.
I run some LINQ queries on both data types and often need to switch between Keys and Values.
What is the best way to ...
- 12.6k
24
votes
3
answers
21k
views
Reverse many-to-many Dictionary<key, List<value>>
Actually my previous question got me thinking
and I realized that reversing a Dictionary is not trivial.
What is the most elegant and readable way to do it?
Same scenario student Many to Many with ...
- 17.9k
16
votes
4
answers
7k
views
C#: Is a SortedDictionary sorted when you enumerate over it?
A SorteDictionary is according to MSDN sorted on the key. Does that mean that you can be sure that it will be sorted when you enumerate it in a foreach? Or does it just mean that the SortedDictionary ...
- 159k
9
votes
6
answers
23k
views
how to use dictionary two way in c#
public static Dictionary<int, string> dic = new Dictionary<int, string>() {
{1,"anystring1"},
{2,"anystring2"}};
I need to use this
string str= dic[1]; // it is ...
- 11.1k
3
votes
4
answers
10k
views
.Net Dictionary with forced unique values
Is it possible to force a Dictionary to have unique values? See the following example.
Dictionary<string, string> types = new Dictionary<string, string>()
{
{"1", "one"},
{...
- 3,223
23
votes
1
answer
23k
views
Bi-directional dictionary? [duplicate]
I have two sets of objects where in some cases the first set will be used as keys for the other set, and in other cases the second set will be used as keys for the first. In addition there must be no ...
- 159k
2
votes
4
answers
5k
views
Getting key from value in .Net collection
I am using a StringDictionary to store key value pairs. I need to use the keys and values interchangeably i.e. I should be able to get the key from the value as in my case the values will be distinct. ...
- 23.9k
1
vote
7
answers
4k
views
Get the next KeyValuePair<,> from a Dictionary<,> without index
Is is possible to obtain the position of a given KeyValuePair<,> within a Dictionary<,>, or the next object, without having an index or alike?
For instance, assume that I have the ...
- 727