How can I remove a value in a dictionary

Question

1.00/5 (1 vote)

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Hi
I used a dictionary in my code

C#

Dictionary<Int32, Dictionary<Int32, List<Int32>>> Staffs = new  Dictionary<int, Dictionary<int, List<int>>>();

then add keys

C#

if (!Staffs.Keys.Contains(staff))
               {
                   Staffs.Add(staff, new Dictionary<int, List<int>>());
               }

               if (!Staffs[staff].Keys.Contains(triad))
               {
                   Staffs[staff].Add(triad, new List<int>());
               }

and then add some value
...

C#

if (staff == 1 && triad == 1)
                   {
                       triad1 = Staffs[1][1].ToArray(); Array.Sort(triad1);
                       mypoint.Add(newpoint);

                   }

...
NOW I want to remove some value from staff[1][1]
????????????????????????????????????????????????????????
please...

What I have tried:

I test Staffs[1][1].RemoveAt(value); but It didn't work

Posted 20-Jul-16 4:37am

hojatIzadi

Updated 20-Jul-16 4:51am

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Comments

F-ES Sitecore 20-Jul-16 10:42am

You have a dictionary inside a dictionary. Do you want to remove from the main dictionary (Staffs), or a dictionary that is a value inside the Staffs dictionary?

hojatIzadi 20-Jul-16 10:43am

yes a dictionary that is a value inside the Staffs dictionary

Philippe Mori 20-Jul-16 14:03pm

Obviously, you should read official MSDN documentation before asking trivial questions.

2 solutions

Solution 2

Use the Dictionary(TKey, TValue).Remove Method (TKey) (System.Collections.Generic)[^]
In your case, that would be:

C#

Staffs[1].Remove(1);

Posted 20-Jul-16 4:51am

OriginalGriff

Comments

hojatIzadi 20-Jul-16 11:06am

thanks and sorry I want to remove an int value from the list that is Tvalue in inner dictionary

OriginalGriff 20-Jul-16 11:38am

Ah! That just means a further index:

Staffs[1][1].Remove(listValue);

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F-ES Sitecore · Accepted Answer · 2016-07-20T04:49:00

C#

Dictionary<Int32, Dictionary<Int32, List<Int32>>> Staffs = new Dictionary<int, Dictionary<int, List<int>>>();

Dictionary<Int32, List<Int32>> staffsDataItem = new Dictionary<int, List<int>>();
staffsDataItem.Add(10, new List<int> {11, 12, 13});
Staffs.Add(1, staffsDataItem);

staffsDataItem = new Dictionary<int, List<int>>();
staffsDataItem.Add(20, new List<int> { 21, 22, 23 });
staffsDataItem.Add(200, new List<int> { 201, 202, 203 });
Staffs.Add(2, staffsDataItem);

staffsDataItem = new Dictionary<int, List<int>>();
staffsDataItem.Add(30, new List<int> { 31, 32, 33 });
Staffs.Add(3, staffsDataItem);

// delete the entire Staffs "3" item
Staffs.Remove(3);

// delete the "20" item from the Staffs "2" item

Staffs[2].Remove(20);
    Console.ReadLine();
}