How to check for the keys when you have a dictionary in a dictionary

Question

How can I write the if statement to check if the keys are not in the dictionary
when I have a dictionary in a dictionary?
I started the if statement, but I do not know how to finish it.
Code is below.

Thanks,
arep

public static Dictionary<string, Dictionary<string, DebOop>> d = new Dictionary<string, Dictionary<string, DebOop>>();
public static void GetData(string memberNbr, string person, string group, string subGroup, string plancode, string date)
{
int year = (DateTime.ParseExact(date, "yyyy-MM-dd", CultureInfo.InvariantCulture)).Year;
//Is key not in dictionary
if (!d.ContainsKey(memberNbr))
{
UpdateData(memberNbr, person, group, subGroup, plancode, date);
}
}

A Repasky · Answer

that is what I thought. Why have the two if statements? He said something about if the key on the nested was the same then then it adds to the inner, but I do not thing this does it, it only forces it. I will put the final result when I get the production program done. I will not get back to it until monday. I figure I should put the finally result when done. Also, I will probably have another question. arep

Vulpes · Answer

TBH, I can't make much sense of it. Apart from the condition itself, the code in the 'if' and 'else' blocks is exactly the same so you'd think there would be a better way of expressing whatever it is he's trying to do.

A Repasky · Answer

Thanks, that was a test program that the lead programmer gave me and I was trying to see how to display the values. He is busy and I could not interupt him. Now two things. I still have to get this all working in the production class. And I do not understand why he had these two if statements. Everything is the same except for the year. I do not know if you could shed any light on this? if (nested.ContainsKey( "1" )) if (nested.ContainsKey( "2" ))

Vulpes · Answer

Try the following: foreach (KeyValuePair > nestedpair in nested) { Console.WriteLine("A=" + "{0}", nestedpair.Key); foreach (KeyValuePair innerpair in nestedpair.Value) { Console.WriteLine("B=" + "{0} : {1}", innerpair.Key, innerpair.Value); } } foreach (var nestedpair in nested) { Console.WriteLine("C=" + "{0}", nestedpair.Key); foreach (var innerpair in nestedpair.Value) { Console.WriteLine("B=" + "{0} : {1}", innerpair.Key, innerpair.Value); } } I've also added the highlighted code to your record class: public class record { public string valueOne { get; set; } public string valueTwo { get; set; } public string valueThree { get; set; } public override string ToString() { return String.Format("[{0}, {1}, {2}]", valueOne, valueTwo, valueThree); } }

A Repasky · Answer

This is the code that only display the key and not the values. foreach ( KeyValuePair string , Dictionary string , record >> nestedpair in nested) { Console .WriteLine( "A=" + "{0}" , "{1}" , nestedpair.Key, nestedpair.Value.ToString()); foreach ( KeyValuePair string , record > innerpair in inner) { Console .WriteLine( "B=" + "{0}" , "{1}" , innerpair.Key, innerpair.Value.ToString()); } } foreach ( var nestedpair in nested) { Console .WriteLine( "C=" + "{0}" , "{1}" , nestedpair.Key, nestedpair.Value.ToString()); } The output is: A={1} B={1} A={1} B={1} C={1} C={1}

A Repasky · Answer

Attached is a file with an example of a nested dictionary. I am trying to display the contents of the dictionary. All I am getting is " " for all the Console.Writeline's. I am using the KeyValuePair in a foreach. Thanks, Arep

Vulpes · Answer

OK, like this perhaps: public static void GetData(string memberNbr, string person, string group, string subGroup, string plancode, string date) { int year = (DateTime.ParseExact(date, "yyyy-MM-dd", CultureInfo.InvariantCulture)).Year; //Is key not in dictionary if (!d.ContainsKey(memberNbr)) // memberNbr isn't in outer dictionary { UpdateData(memberNbr, person, group, subGroup, plancode, date); } else // memberNbr is in outer dictionary { Dictionary dict = d[memberNbr]; if(!dict.ContainsKey(year.ToString()) // but year isn't in inner dictionary for memberNbr outer key { UpdateData(memberNbr, person, group, subGroup, plancode, date); } } }

A Repasky · Answer

I want to check for the memberNbr and the year for that memberMbr. If they are already in the dictionary then I do not need to add them.

Vulpes · Answer

The code to add a record will be something like this: Dictionary d2 = new Dictionary (); d2.Add(year.ToString(), record); d1.Add(memberNbr, d2); However, I'm still not 100% clear what you want to check for. Suppose memberNbr is the key. Do you want to check that memberNbr: 1. Is not a key of d1; and 2. Is not a key of any d2 whatever d1.Key is?

A Repasky · Answer

I use both keys. My add is not working either. Here it is: Here is my add statement: d.Add((memberNbr, ); I do not know how this should be written. I have tried "(" also.

Vulpes · Answer

Which dictionary shouldn't contain the key, the outer dictionary, one of the inner dictionaries or both? If it's just the outer dictionary, then what you've done already is correct. If it's one of the inner dictionaries (or both), then what outer key should be used to retrieve it and what inner key shouldn't it have?