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C# ArrayList
individually indexable ordered collection of an object are represented by C# arraylist.
In array we have problem of deleting items but in array list we can do it easily.
We have several properties and methods associated with the array list.
| Property |
Description |
| Capacity |
Gets or sets the number of elements that the ArrayList can contain. |
| Count |
Gets the number of elements actually contained in the ArrayList. |
| IsFixedSize |
Gets a value indicating whether the ArrayList has a fixed size. |
| IsReadOnly |
Gets a value indicating whether the ArrayList is read-only. |
| Item |
Gets or sets the element at the specified index. |
| Sr.No. |
Methods |
| 1 |
public virtual int Add(object value);
This will Adds an object to the end of the ArrayList.
|
| 2 |
public virtual void AddRange(ICollection c);
This will Adds the elements of an ICollection to the end of the ArrayList.
|
| 3 |
public virtual void Clear();
This will Removes all elements from the ArrayList.
|
| 4 |
public virtual bool Contains(object item);
This will Determines whether an element is in the ArrayList.
|
| 5 |
public virtual ArrayList GetRange(int index, int count);
This will Returns an ArrayList which represents a subset of the elements in the source ArrayList.
|
| 6 |
public virtual int IndexOf(object);
This will Returns the zero-based index of the first occurrence of a value in the ArrayList or in a portion of it.
|
| 7 |
public virtual void Insert(int index, object value);
This will Inserts an element into the ArrayList at the specified index.
|
| 8 |
public virtual void InsertRange(int index, ICollection c);
This will Inserts the elements of a collection into the ArrayList at the specified index.
|
| 9 |
public virtual void Remove(object obj);
This will Removes the first occurrence of a specific object from the ArrayList.
|
| 10 |
public virtual void RemoveAt(int index);
This will Removes the element at the specified index of the ArrayList.
|
| 11 |
public virtual void RemoveRange(int index, int count);
This will Removes a range of elements from the ArrayList.
|
| 12 |
public virtual void Reverse();
This will Reverses the order of the elements in the ArrayList.
|
| 13 |
public virtual void SetRange(int index, ICollection c);
It will Copies the elements of a collection over a range of elements in the ArrayList.
|
| 14 |
public virtual void Sort();
Sorts the elements in the ArrayList.
|
| 15 |
public virtual void TrimToSize();
Sets the capacity to the actual number of elements in the ArrayList.
|
Hence the above are the methods and properties associated with the array list.
We will use these properties and methods in our program.
class Program
{
static void Main(string[] args)
{
ArrayList al = new ArrayList();
Console.WriteLine("Adding some numbers:");
al.Add(45);
al.Add(78);
al.Add(33);
al.Add(56);
al.Add(12);
al.Add(23);
al.Add(9);
Console.WriteLine("Capacity: {0} ", al.Capacity);
Console.WriteLine("Count: {0}", al.Count);
Console.Write("Content: ");
foreach (int i in al)
{
Console.Write(i + " ");
}
Console.WriteLine();
Console.Write("Sorted Content: ");
al.Sort();
foreach (int i in al)
{
Console.Write(i + " ");
}
Console.WriteLine();
Console.ReadKey();
}
}
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