How to create an array in asp.net using c#.net?

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Arrays are fundamental data structures in C#.Net used to store multiple items of the same type. In this tutorial, we’ll focus exclusively on different ways to create an array in asp.net using c#.net.

Create an array in asp.net using c#.net

Let us now check, how to create different types of arrays in C#.Net. I am doing all the examples using an asp.net web form application and using C# as the language.

Create a One-dimensional Array in C#.Net

Follow the below steps to create a one-dimensional array in asp.net using C#.Net.

Declare and Initialize Simultaneously

To declare an array and initialize it at the same time in C#.Net follow the below syntax:

int[] numbers = { 1, 2, 3, 4, 5 };

Declare First, Then Initialize

We can also create a one-dimensional array by declaring first and then initializing it.

First, declare the array:

int[] numbers;

Then initialize it by specifying the size:

numbers = new int[5];

Or by specifying the values:

numbers = new int[] { 1, 2, 3, 4, 5 };

Create Multidimensional Arrays in C#.Net

Now, I will show you how to create a multidimensional array in C.Net.

Rectangular Arrays

A C#.net rectangular array has multiple dimensions.

Declare and Initialize:

int[,] matrix = new int[2, 3] { { 1, 2, 3 }, { 4, 5, 6 } };

Create Jagged Arrays in C#.Net

Now, let us see, how to create a jagged array in C#.Net.

A jagged array is an array of arrays. Each sub-array can have a different length.

Declare and Initialize

int[][] jaggedArray = new int[3][];
jaggedArray[0] = new int[] { 1 };
jaggedArray[1] = new int[] { 2, 3 };
jaggedArray[2] = new int[] { 4, 5, 6 };

Create an array using Array Class Methods

The Array class in C# offers methods to create and manipulate arrays.

Array.CreateInstance allows you to create an array dynamically:

Array dynamicArray = Array.CreateInstance(typeof(int), 5);

This creates an integer array of size 5.

Create an array with default values in C#.Net

In C#, when an array is constructed without values, it’s initialized with default values. This is helpful in ASP.NET scenarios where placeholder values are needed.

int[] defaultValuesArray = new int[5];
string[] defaultStrings = new string[3];
bool[] defaultBools = new bool[3];

Conclusion

Arrays in C#.Net are a pillar of ASP.NET development, allowing for versatile data storage and manipulation. With this guide, ASP.NET developers now have a robust understanding of creating arrays in C#.Net.

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