ArrayList.ToArray Method is used to copy the elements of the ArrayList to a new array. This method contains two methods in its overload list as follows:
- ToArray()
- ToArray(Type)
ToArray()
This method is used to copy the elements of the ArrayList to a new Object array. The elements are copied using Array.Copy, which is an O(n) operation, where n is Count.
Syntax:
public virtual object[] ToArray ();
Return Value: This method will return an Object array containing copies of the elements of the ArrayList.
Example:
// C# program to illustrate ToArray() Method using System;
using System.Collections;
class GFG {
// Main Method
public static void Main()
{
// Create and initializing ArrayList
ArrayList mylist = new ArrayList(5);
mylist.Add( "G" );
mylist.Add( "E" );
mylist.Add( "E" );
mylist.Add( "K" );
mylist.Add( "S" );
// Copy the data of Arraylist into
// the object Array Using ToArray()
// method
object [] str2 = mylist.ToArray();
foreach ( string i in str2)
{
Console.WriteLine(i);
}
}
} |
G E E K S
ToArray(Type)
This method is used to copy the elements of the ArrayList to a new array of the specified element type. The elements are copied using Array.Copy, which is an O(n) operation, where n is Count.
Syntax:
public virtual Array ToArray (Type t);
Here, t is the element Type of the destination array to create and copy elements to.
Return Value : This method will return an array of the specified element type containing copies of the elements of the ArrayList.
Exception:
- If the value of t is null then this method will give ArgumentNullException.
- If the type of the source ArrayList cannot be cast automatically to the specified type, then this method will give InvalidCastException.
Note: All of the objects in the ArrayList object will be cast to the Type specified in the type parameter.
Example:
// C# program to illustrate ToArray(Type) Method using System;
using System.Collections;
class GFG {
// Main Method
public static void Main()
{
// Create and initialize new array
ArrayList mylist = new ArrayList(5);
mylist.Add( "G" );
mylist.Add( "E" );
mylist.Add( "E" );
mylist.Add( "K" );
mylist.Add( "S" );
// Copy the data of Arraylist into
// the string Array Using
// ToArray(Type) method
string [] str2 = ( string [])mylist.ToArray( typeof ( string ));
// Display the data of str2 string
foreach ( string i in str2)
{
Console.WriteLine(i);
}
}
} |
G E E K S
Reference: