private void DeleteData()
{
if (info == "")
{
Console.WriteLine("No Data Present To Delete..\n Deletition couldn't be performed");
Console.ReadKey();
}
else
{
TwoWayNode current = this;
Console.Write("\nWhich Data You want to Delete : ");
string cmp = Console.ReadLine();
while ((current != null) && (current.info.ToLower().Equals(cmp.ToLower()) == false))
{
current = current.next;
}
if (current == null)
{
Console.WriteLine($"{cmp} Not Present..\n Deletition couldn't be performed");
Console.ReadKey();
}
else if (current.prev == null)
{
this.DeleteFirst();
}
else
{
current.prev.next = current.next;
//current = null;
}
}
}
private void DeleteLast()
{
if (info == "")
{
Console.WriteLine("No Data Present To Delete..\n Deletition couldn't be performed");
Console.ReadKey();
}
else
{
TwoWayNode current = this;
while (current.next != null)
{
current = current.next;
}
if (current.prev == null)
{
this.DeleteFirst();
}
else
{
current.prev.next = null;
// current = null;
}
}
}
private void InsertFront()
{
Console.Write("Enter The Data You Want To Store : ");
string ii;
do
{
ii = Console.ReadLine();
} while (ii == "");
if (info == "")
{
info = ii;
}
else
{
TwoWayNode newNode = new TwoWayNode
{
info = this.info,
next = this.next,
prev = this
};
this.info = ii;
this.next = newNode;
}
}
private void InsertLast()
{
Console.Write("Enter The Data You Want To Store : ");
string ii;
do
{
ii = Console.ReadLine();
} while (ii == "");
if (info == "")
{
info = ii;
}
else
{
TwoWayNode newNode = new TwoWayNode
{
info = ii
};
TwoWayNode current = this;
while (current.next != null)
{
current = current.next;
}
current.next = newNode;
newNode.prev = current;
}
}
private void DisplayAll()
{
TwoWayNode current = this;
Console.Write("Nodes :");
if (info == "")
{
Console.WriteLine(" Empty Linear Node\n");
}
else
{
do
{
Console.Write($" {current.info} ");
current = current.next;
} while (current != null);
Console.WriteLine("\n");
}
}
private void InsertAfter()
{
Console.Write("Enter The Data You Want To Store : ");
string ii;
do
{
ii = Console.ReadLine();
} while (ii == "");
if (info == "")
{
Console.WriteLine("No Data present in the List..\n DATA NOT INSERTED");
Console.ReadKey();
}
else
{
TwoWayNode newNode = new TwoWayNode
{
info = ii
};
TwoWayNode current = this;
Console.Write("\nAfter which Data You want to Store : ");
String cmp = Console.ReadLine();
while ((current != null) && (current.info.ToLower().Equals(cmp.ToLower()) == false))
{
current = current.next;
}
if (current == null)
{
Console.WriteLine($"{cmp} not found in Nodes..\n DATA NOT INSERTED");
Console.ReadKey();
}
else
{
newNode.next = current.next;
current.next = newNode;
current.next.prev = newNode;
newNode.prev = current;
}
}
}
private void DeleteFirst()
{
if (info == "")
{
Console.WriteLine("No Data Present To Delete..");
Console.ReadKey();
}
else
{
TwoWayNode current = this.next;
if (current == null)
{
this.info = "";
}
else
{
this.info = current.info;
this.next = current.next;
//current = null;
}
}
}
public TwoWayNode()
{
next = prev = null;
info = "";
}