remove specific values from multi value dictionary
- by Anthony
I've seen posts here on how to make a dictionary that has multiple values per key, like one of the solutions presented in this link:
Multi Value Dictionary
it seems that I have to use a List< as the value for the keys, so that a key can store multiple values.
the solution in the link is fine if you want to add values. But my problem now is how to remove specific values from a single key.
I have this code for adding values to a dictionary:
private Dictionary<TKey, List<TValue>> mEventDict;
// this is for initializing the dictionary
public void Subscribe(eVtEvtId inEvent, VtEvtDelegate inCallbackMethod)
{
if (mEventDict.ContainsKey(inEvent))
{
mEventDict[inEvent].Add(inCallbackMethod);
}
else
{
mEventDict.Add(inEvent, new List<TValue>() { v });
}
}
// this is for adding values to the dictionary.
// if the "key" (inEvent) is not yet present in the dictionary,
// the key will be added first before the value
my problem now is removing a specific value from a key. I have this code:
public void Unsubscribe(eVtEvtId inEvent, VtEvtDelegate inCallbackMethod)
{
try
{
mEventDict[inEvent].Remove(inCallbackMethod);
}
catch (ArgumentNullException)
{
MessageBox.Show("The event is not yet present in the dictionary");
}
}
basically, what I did is just replace the Add() with Remove() . Will this work?
Also, if you have any problems or questions with the code (initialization, etc.), feel free to ask.
Thanks for the advice.
