Hashtable with MultiDimensional Key in C#

c# dictionary hashtable
Scott Schulthess picture Scott Schulthess · Mar 27, 2009 · Viewed 80k times · Source

I'm basically looking for a way to access a hashtable value using a two-dimensional typed key in c#.

Eventually I would be able to do something like this 

HashTable[1][false] = 5;
int a = HashTable[1][false];
//a = 5

This is what I've been trying...hasn't worked

Hashtable test = new Hashtable();
test.Add(new Dictionary<int, bool>() { { 1, true } }, 555);
Dictionary<int, bool> temp = new Dictionary<int, bool>() {{1, true}};
string testz = test[temp].ToString();

Answer

JaredPar picture JaredPar · Mar 27, 2009

I think a better approach is to encapsulate the many fields of your multi-dimensional key into a class / struct. For example

struct Key {
  public readonly int Dimension1;
  public readonly bool Dimension2;
  public Key(int p1, bool p2) {
    Dimension1 = p1;
    Dimension2 = p2;
  }
  // Equals and GetHashCode ommitted
}

Now you can create and use a normal HashTable and use this wrapper as a Key.

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