Array.Resize(T[], Int32) Method is used to resize the number of elements present in the array. Or in other words, this method is used to change the number of elements of a one-dimensional array to the specified new size. It resizes the only 1-D array, not multidimensional array.
Syntax:
CSharp
CSharp
public static void Resize<T> (ref T[] array, int newSize);Parameters:
array: It is a one-dimensional, zero-based array to resize, or null to create a new array with the specified size. newsize: It is the size of the new array.Exception:If the value of nsize is less than zero, then this method will give ArgumentOutOfRangeException. Note: This method is an O(n) operation, where n is new size. Below given are some examples to understand the implementation in a better way: Example 1:
// C# program to resize the
// elements of the 1-D array
using System;
public class GFG {
// Main method
static public void Main()
{
// create and initialize array
string[] myarray = {"C#", "Java", "C++", "Python",
"HTML", "CSS", "JavaScript"};
// Display original array before Resize
Console.WriteLine("Original Array:");
foreach(string i in myarray)
{
Console.WriteLine(i);
}
int len = myarray.Length;
Console.WriteLine("Length of myarray: "+len);
Console.WriteLine();
// Resize the element of myarray and
// create a new array. Here new array
// is smaller than the original array
// so, elements are copied from the
// myarray to the new array until the
// new one is filled. The rest of the
// elements in the old array are ignored
Array.Resize(ref myarray, len - 3);
Console.WriteLine("New array is less than myarray:");
foreach(string j in myarray)
{
Console.WriteLine(j);
}
}
}
Output:
Example 2:
Original Array: C# Java C++ Python HTML CSS JavaScript Length of myarray: 7 New array is less than myarray: C# Java C++ Python
// C# program to resize the
// elements of the 1-D array
using System;
public class GFG {
// Main method
static public void Main()
{
// create and initialize array
string[] myarray = {"C#", "C++", "Ruby",
"Java", "PHP", "Perl"};
// Display original string before Resize
Console.WriteLine("Original Array:");
foreach(string i in myarray)
{
Console.WriteLine(i);
}
// Length of old array
int len = myarray.Length;
Console.WriteLine("Length of myarray: "+len);
Console.WriteLine();
// Resize the element of myarray
// and create a new array
// Here new array is greater than
// original array so, all the element
// from myarray is copied to new array
// and remaining will be null
Array.Resize(ref myarray, 10);
Console.WriteLine("New array is greater than myarray:");
foreach(string j in myarray)
{
Console.WriteLine(j);
}
// Length of new array
int len1 = myarray.Length;
Console.WriteLine("Length of New Array: "+len1);
}
}
Output:
Reference: https://learn.microsoft.com/en-us/dotnet/api/system.array.resize?view=netcore-2.1Original Array: C# C++ Ruby Java PHP Perl Length of myarray: 6 New array is greater than myarray: C# C++ Ruby Java PHP Perl Length of New Array: 10
