Server Side Programming Articles - Page 2408 of 2646

Extension methods are static methods, which are called as if they were instance methods on the extended type. With Extension methods, you can add methods to existing types without even creating a new derived type, recompiling, or modifying the original type.The following is the extension method we have created.public static int myExtensionMethod(this string str) {    return Int32.Parse(str); }Let us see an example wherein we have used extension method.Example Live Demousing System; using System.Text; namespace Program {    public static class Demo {       public static int myExtensionMethod(this string str) {          return Int32.Parse(str);     ... Read More

The break statement terminates the loop and transfers execution to the statement immediately following the loop.When the break statement is encountered inside a loop, the loop is immediately terminated and program control resumes at the next statement following the loop.Let us see an example to learn how to work with break statement in while loop. The following code snippet terminates the loop using break statement.if (a > 15) {    break; }The following is the complete code.Example Live Demousing System; namespace Demo {    class Program {       static void Main(string[] args) {          /* local ... Read More

It lets you modify the compiler's line number and (optionally) the file name output for errors and warnings. Let us see some examples. #line 100 "demo" int a; // CS0168 on line 100 int b; // CS0168 on line 101 int c; // CS0168 on line 102 As shown above the example reports three warnings associated with line numbers. The #line 100 directive forces the line number to be 100 and until the next #line directive, the filename will be reported as "demo”. Let’s see ... Read More

To access Array elements in a foreach statement, use the numeric index.Let’s say the following is our code.Example Live Demousing System; namespace ArrayApplication {    class MyArray {       static void Main(string[] args) {          int [] n = new int[10]; /* n is an array of 10 integers */          /* initialize elements of array n */          for ( int i = 0; i < 10; i++ ) {             n[i] = i + 100;          }       ... Read More

To sort a two-dimensional array in C#, in a nested for loop, add another for loop to check the following condition.Examplefor (int k = 0; k < j; k++) {    if (arr[i, k] > arr[i, k + 1]) {       int myTemp = arr[i, k];       arr[i, k] = arr[i, k + 1];       arr[i, k + 1] = myTemp;    } }Till the outer loop loops through, use the GetLength() method as shown below. This is done to sort the array.Examplefor (int i = 0; i < arr.GetLength(0); i++) {    for ... Read More

C# allows multidimensional arrays. Multi-dimensional arrays are also called rectangular array. Declare a 2-dimensional array of strings as.string [, ] names;A 2-dimensional array can be thought of as a table, which has x number of rows and y number of columns.Multidimensional arrays may be initialized by specifying bracketed values for each row. The following array is with 4 rows and each row has 4 columns.int [, ] a = new int [4, 4] {    {0, 1, 2, 3} , /* initializers for row indexed by 0 */    {4, 5, 6, 7} , /* initializers for row indexed by ... Read More

The following is the unsorted array.int[] list = {98, 23, 97, 36, 77};Now first use the Sort() method to sort the array.Array.Reverse(list);Use the Reverse() method that would eventually give you a sorted array in descending order.Array.Reverse(list);You can try to run the following code to to sort an array in descending order.Example Live Demousing System; namespace Demo {    public class MyApplication {       public static void Main(string[] args) {          int[] list = {98, 23, 97, 36, 77};          Console.WriteLine("Original Unsorted List");          foreach (int i in list) {   ... Read More

A foreach loop is used to execute a statement or a group of statements for each element in an array or collection.It is similar to for Loop; however, the loop is executed for each element in an array or group. Therefoe, the index does not exist in it.Let us see an example of Bubble Sort, wherein after sorting the elements, we will display the elements using the foreach loop.Example Live Demousing System; namespace BubbleSort {    class MySort {       static void Main(string[] args) {          int[] arr = { 78, 55, 45, 98, 13 };          int temp;          for (int j = 0; j

The continue statement causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating.The continue statement in C# works somewhat like the break statement. Instead of forcing termination, however, continue forces the next iteration of the loop to take place, skipping any code in between.For the while loop, continue statement causes the program control passes to the conditional tests.The following is the complete code to use continue statement in a while loop.Example Live Demousing System; namespace Demo {    class Program {       static void Main(string[] args) {         ... Read More

This is the default mechanism for passing parameters to a method. In this mechanism, when a method is called, a new storage location is created for each value parameter.The values of the actual parameters are copied into them. Hence, the changes made to the parameter inside the method have no effect on the argument. The following is the code to pass parameters by value.Example Live Demousing System; namespace CalculatorApplication {    class NumberManipulator {       public void swap(int x, int y) {          int temp;          temp = x; /* save the value ... Read More