How can I decrease count of list

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Hi I have a list in my code and I want to decrease count of the list when I remove an Item from it

What I have tried:

I test mylist.count--; and I used a variable for my work but it is not sutable

Posted 20-Jul-16 21:23pm

hojatIzadi

Updated 20-Jul-16 21:56pm

v2

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Comments

Anisuzzaman Sumon 21-Jul-16 3:30am

show up your code.Your question is not so clear!

Ralf Meier 21-Jul-16 3:40am

If you remove an Item from your List then List.Count ist automaticly decreased.
How do you remove an Item from your List ? Show the relevant code-part ...

hojatIzadi 21-Jul-16 3:56am

Dictionary<int32, dictionary<int32,="" list<int32="">>> Staffs = new Dictionary<int, dictionary<int,="" list<int="">>>();
//---------------
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>());
}

if (Staffs[staff][triad].Count >= 4)
{
if(myVar.sitnote)
MessageBox.Show("Maximum notes reached");

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

}
//--------------------------
foreach (int value in Staffs[1][1])
{
if (value == noteloc)
{

a = true;
qq = value;

}
}
if (a)
Staffs[1][1].Remove(qq);
triad1 = Staffs[1][1].ToArray();

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OriginalGriff · Accepted Answer · 2016-07-20T21:56:00

You don't need to. If you are using a standard List<T> or (Gawd forbid) even an ArrayList the act of adding or removing an item alters the count automatically.
There is no good case where anyone should have to call a method to remove an item and also remember to update the items count, even if you "brew your own" collection - the remove method should always maintain the count correctly.