public void InsertAt(int position, T value)
{
ListNodeClass <T> adding = new ListNodeClass <T>(value);
int number = 0;
if (position == 0)
{
adding.Next = Head;
Head.Previous = adding;
Head = adding;
count++;
}
else
{
Current = Head;
while (number <= position)
{
if (number == position)
{
Result = Current;
Result.Previous.Next = adding;
adding.Previous = Result.Previous;
Result.Previous = adding;
adding.Next = Result;
}
Current = Current.Next;
number++;
}
}
}
public bool Check(T value)
{
ListNodeClass <T> found = FindItem(value);
if (found == null)
{
return(false);
}
else
{
return(true);
}
}
private ListNodeClass <T> FindItem(T value)
{
Current = Head;
while (Current != null)
{
if (Current.Value.Equals(value))
{
return(Current);
}
Current = Current.Next;
}
return(null);
}
public int IndexItem(T value)
{
int position = 0;
Current = Head;
while (Current != null && position <= count)
{
if (Current.Value.Equals(value))
{
return(position);
}
Current = Current.Next;
position++;
}
return(-1);
}
public int AddItem(T value)
{
ListNodeClass <T> adding = new ListNodeClass <T>(value);
if (Head == null)
{
Head = adding;
Tail = Head;
}
if (Head != null)
{
Tail.Next = adding;
adding.Previous = Tail;
Tail = adding;
Tail.Next = null;
}
count++;
return(count);
}
public void Remove(T value)
{
ListNodeClass <T> found = FindItem(value);
if (found != null)
{
ListNodeClass <T> previous = found.Previous;
ListNodeClass <T> next = found.Next;
if (previous == null)
{
Head = next;
if (Head != null)
{
Head.Previous = null;
}
}
else
{
previous.Next = next;
}
if (next == null)
{
Tail = previous;
if (Tail != null)
{
Tail.Next = null;
}
}
else
{
next.Previous = previous;
}
count--;
}
}
public T Search(T value)
{
ListNodeClass <T> found = FindItem(value);
return(found.Value);
}
