How do I load the dictionary?

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Hi,
I have a problem, I'm trying to get from my dictionary :

C#

new Dictionary<Dictionary<MapMember, List<long>>, double>();

List<long> so that I can pass the list in foreach.How do I get individual long values?

What I have tried:

To illustrate,

C#

Dictionary<Dictionary<MapMember, List<long>>, double>()

has four values, then each

C#

Dictionary<MapMember, List<long>

has one key and several values in List

Posted 17-Oct-22 1:02am

dejf111

Updated 17-Oct-22 1:34am

v2

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Graeme_Grant · Answer 1 · 2022-10-17T01:34:00

Solution 2

This website is great for beginners and those needing a reference: tutorialsteacher - C# Dictionary[^]

Posted 17-Oct-22 1:34am

Graeme_Grant

Richard Deeming · Answer 2 · 2022-10-17T01:15:00

Solution 1

You can extract the values by looping over the keys of the outer dictionary, then looping over the values of the inner dictionary:

C#

foreach (Dictionary<MapMember, List<long>> key in yourDictionary.Keys)
{
    foreach (List<long> list in key.Values)
    {
        // Do something with the list here...
    }
}

However, using a Dictionary as the key for another Dictionary is almost certainly the wrong thing to do.

Posted 17-Oct-22 1:15am

Richard Deeming

Comments

dejf111 17-Oct-22 7:24am

And how should it be done? That is, with the same function.

Richard Deeming 17-Oct-22 7:49am

No idea, since you haven't told us what you're actually trying to do, only that you have a dictionary which uses a dictionary as its key.

Dave Kreskowiak 17-Oct-22 8:27am

What your code said was NOT "use this value from this inner dictionary as the key in the outer dictionary." Your code said "use the ENTIRE INNER DICTIONARY OBJECT as the key to the outer dictionary."

It looks like you should be using two independent dictionaries, but since you haven't said anything about the data you're trying to represent and their relations, it's impossible for anyone to tell you what to do to fix this.