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Csharp Articles
Page 96 of 196
Orderby clause in C#
The orderby is used in C# to sort elements in the collection based on specified fields in a particular order. The order can be ascending or descending.The following is our list with elements −List myList = new List(); // adding elements myList.Add("iOS by Apple"); myList.Add("Android by Google"); myList.Add("Symbian by Nokia");Now, use Orderby to order the elements in descending order −var myLen = from element in myList orderby element.Length descending select element;The following is the complete code −Exampleusing System; using System.Collections.Generic; using System.Linq; class Demo { static void Main() { List myList = new List(); ...
Read MoreRead in a file in C# with StreamReader
To read text files, use StreamReader class in C#.Add the name of the file you want to read −StreamReader sr = new StreamReader("hello.txt");Use the ReadLine() method and get the content of the file in a string −using (StreamReader sr = new StreamReader("hello.txt")) { str = sr.ReadLine(); } Console.WriteLine(str);Let us see the following code −Exampleusing System.IO; using System; public class Program { public static void Main() { string str; using (StreamWriter sw = new StreamWriter("hello.txt")) { sw.WriteLine("Hello"); sw.WriteLine("World"); } ...
Read MoreC# program to return an array from methods
Call a method under Join method to join words −string.Join(" ", display())Now set a string array −string[] str = new string[5];Add individual elements −str[0] = "My"; str[1] = "name"; str[2] = "is"; str[3] = "Brad"; str[4] = "Pitt";And return the same string array from method −return str;The following is the complete code −Exampleusing System; public class Demo { public static void Main() { Console.WriteLine(string.Join(" ", display())); } static string[] display() { string[] str = new string[5]; // string array elements str[0] = "My"; str[1] = "name"; str[2] = "is"; str[3] = "Brad"; str[4] = "Pitt"; return str; } }OutputMy name is Brad Pitt
Read MoreC# program to get the last element from an array
Firstly, set an array −string[] str = new string[]{ "Java", "HTML", "jQuery", "JavaScript", "Bootstrap" };To get the value of the last element, get the length and display the following value −str[str.Length - 1]The above returns the last element.Here is the complete code −Exampleusing System; public class Demo { public static void Main() { string[] str = new string[] { "Java", "HTML", "jQuery", "JavaScript", "Bootstrap" }; Console.WriteLine("Array..."); foreach(string res in str) { Console.WriteLine(res); } Console.WriteLine("Last element: "+str[str.Length - 1]); } }OutputArray... Java HTML jQuery JavaScript Bootstrap Last element: Bootstrap
Read MoreC# program to iterate over a string array with for loop
Create a string array −string[] str = new string[] { "Videos", "Tutorials", "Tools", "InterviewQA" };Loop until the length of the array −for (int i = 0; i < str.Length; i++) { string res = str[i]; Console.WriteLine(res); }Here is the complete code −Exampleusing System; public class Demo { public static void Main() { string[] str = new string[] { "Videos", "Tutorials", "Tools", "InterviewQA" }; Console.WriteLine("String Array..."); for (int i = 0; i < str.Length; i++) { string res = str[i]; Console.WriteLine(res); } } }OutputString Array... Videos Tutorials Tools InterviewQA
Read MoreC# program to create an empty string array
To create an empty string array −string[] str = new string[] {};Above, we haven’t added elements to the array, since it is empty.Even if we will loop though the array, it won’t display anything as shown below −Exampleusing System; public class Demo { public static void Main() { string[] str = new string[] {}; Console.WriteLine("String Array elements won't get displayed since it's empty..."); for (int i = 0; i < str.Length; i++) { string res = str[i]; Console.WriteLine(res); } } }OutputString Array elements won't get displayed since it's empty...
Read MoreC# program to find the index of a word in a string
Declare and initialize an array −string[] str = new string[] { "Cat", "Mat", "Rat" };Now, ue IndexOf() method to find the index of the word “Mat” −Array.IndexOf(str, "Mat");The following is the code −Exampleusing System; public class Demo { public static void Main() { string[] str = new string[] { "Cat", "Mat", "Rat" }; Console.WriteLine("Our Array ="); for (int i = 0; i < str.Length; i++) { string res = str[i]; Console.WriteLine(res); } int findIndex = Array.IndexOf(str, "Mat"); Console.Write("Element Mat found at the following index: "); Console.WriteLine(findIndex); } }OutputOur Array = Cat Mat Rat Element Mat found at the following index: 1
Read MoreC# program to separate joined strings in C#
The following is the string array −string[] str = { "Java", "AngularJS", "Python", "jQuery", "HTML5" };Firstly, join it −string.Join(" ", str);Now to separate the above joined strings, use the Split() method as shown in the following code −Exampleusing System; public class Demo { public static void Main() { string[] str = { "Java", "AngularJS", "Python", "jQuery", "HTML5" }; // join words string res = string.Join(" ", str); Console.WriteLine("Joined Strings... "+res); string[] convert = res.Split(' '); Console.WriteLine("Separate Joined Strings..."); foreach (string val in convert) { Console.WriteLine(val); } } }OutputJoined Strings... Java AngularJS Python jQuery HTML5 Separate Joined Strings... Java AngularJS Python jQuery HTML5
Read MoreBool Array in C#
In a bool array, you can store true and false values. To set a bool array, use the new operator −bool[] arr = new bool[5];To add elements in the array −arr[0] = true; arr[1] = true; arr[2] = false; arr[3] = true; arr[4] = true;Let us see the complete code −Exampleusing System; public class Demo { public static void Main() { bool[] arr = new bool[5]; arr[0] = true; arr[1] = true; arr[2] = false; arr[3] = true; arr[4] = true; Console.WriteLine("Displaying values..."); foreach (bool res in arr) { Console.WriteLine(res); } } }OutputDisplaying values... True True False True True
Read MoreDefault operator in C#
Using the default, you can get the default value of every reference and value type. The expressions set as default are evaluated at compile-time.To get the default for int −default(int);To get the default for long −default(long)Let us see the code to display default values −Exampleusing System; public class Demo { public static void Main() { int val1 = default(int); long val2 = default(long); bool val3 = default(bool); // default for int Console.WriteLine(val1); // default for long Console.WriteLine(val2); // default for bol Console.WriteLine(val3); } }Output0 0 False
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