Found 27759 Articles for Server Side Programming

To define the scope and visibility of a class member, use an access specifier. C# supports the following access specifiers. Public Private Protected Internal Protected internal Let us learn about them one by one. Public Access Specifier It allows a class to expose its member variables and member functions to other functions and objects. Private Access Specifier Private access specifier allows a class to hide its member variables and member functions from other functions and objects. Only functions of the same class can access its private members. Protected Access Specifier Protected access specifier allows a child class to ... Read More

The "is" operator in C# checks whether the run-time type of an object is compatible with a given type or not.The following is the syntax.expr is typeHere, expr is the expressiontype is the name of the typeThe following is an example showing the usage of is operator in C#.Exampleusing System; class One { } class Two { } public class Demo {    public static void Test(object obj) {       One x;       Two y;       if (obj is One) {          Console.WriteLine("Class One");          x = (One)obj; ... Read More

To compare enum members, use the Enum.CompareTo() method.Firstly, set the values for students.enum StudentRank { Tom = 3, Henry = 2, Amit = 1 };Now use the compareTo() method to compare one enum value with another.Console.WriteLine( "{0}{1}", student1.CompareTo(student2) > 0 ? "Yes" : "No", Environment.NewLine );The following is the code to compare enum members in C#.Example Live Demousing System; public class Demo {    enum StudentRank { Tom = 3, Henry = 2, Amit = 1 };    public static void Main() {       StudentRank student1 = StudentRank.Tom;       StudentRank student2 = StudentRank.Henry;       StudentRank ... Read More

string keyword Use the string keyword to declare a string variable. The string keyword is an alias for the System.String class. For example. string name; name = "Tom Hanks"; Another example. string [] array={ "Hello", "From", "Tutorials", "Point" }; char keyword The char keyword is used to set array of characters. For example. char[] ch = new char[2]; ch[0] = 'A'; // Character literal ch[1] = 'B'; // Character literal Another example. char []letters= { 'H', 'e', 'l', 'l','o' };

Firstly, set the string to be checked.string s = "timetime";Now set two counters for two halves of the string.int []one = new int[MAX_CHAR]; int []two = new int[MAX_CHAR];Check for both the halves of the string.for (int i = 0, j = l - 1; i < j; i++, j--) {    one[str[i] - 'a']++;    two[str[j] - 'a']++; }The following is the complete code to check whether both the halves of the string have same set of characters or not in C#.Example Live Demousing System; class Demo {    static int MAX_CHAR = 26;    static bool findSameCharacters(string str) {   ... Read More

Use the isFixedSize property of Hashtable class to get a value indicating whether the Hashtable has a fixed size.The following is an example showing how to work with IsFixedSize property.Example Live Demousing System; using System.Collections; namespace Demo {    class Program {       static void Main(string[] args) {          Hashtable ht = new Hashtable();          ht.Add("D01", "Finance");          ht.Add("D02", "HR");          ht.Add("D03", "Operations");          Console.WriteLine("IsFixedSize = " + ht.IsFixedSize);          Console.ReadKey();       }    } }OutputIsFixedSize = FalseAbove we ... Read More

Use the File.exists method in C# to check if a file exits in C# or not.Firstly, check whether the file is present in the current directory.if (File.Exists("MyFile.txt")) {    Console.WriteLine("The file exists."); }After that check whether the file exist in a directory or not.if (File.Exists(@"D:\myfile.txt")) {    Console.WriteLine("The file exists."); }Let us see the complete example to check if a file exists in C#.Example Live Demousing System; using System.IO; class Demo {    static void Main() {       if (File.Exists("MyFile.txt")) {          Console.WriteLine("File exists...");       } else {          Console.WriteLine("File does ... Read More

To retrieve the attributes of a file, use the FileAttributes Eumeration. It has various members like compressed, directory, hidden, etc. To check if a file is hidden, use the hidden member name. If the FileAttributes.hidden is set that would mean the file is hidden. Firstly, get the path to find the attributes. FileAttributes attributes = File.GetAttributes(path); If the following is set, that would mean the file is now hidden using the hidden member name. File.SetAttributes(path, File.GetAttributes(path) | FileAttributes.Hidden); Console.WriteLine("The {0} file is hidden.", path);

Use the IsReadOnly property to get a value indicating whether the SortedList is read-only or not.You can try to run the following code to implement IsReadOnly property in C#.Here, we have set the SortedList first.SortedList s = new SortedList();Added elements.s.Add("S001", "Jack"); s.Add("S002", "Henry");Now check for IsReadOnly.Console.WriteLine("IsReadOnly = " + s.IsReadOnly);The following is the complete code.Example Live Demousing System; using System.Collections; namespace Demo {    class Program {       static void Main(string[] args) {          SortedList s = new SortedList();          s.Add("S001", "Jack");          s.Add("S002", "Henry");          Console.WriteLine("IsReadOnly ... Read More

Character constantsCharacter literals are enclosed in single quotes. For example, 'x' and can be stored in a simple variable of char type. A character literal can be a plain character (such as 'x'), an escape sequence (such as '\t'), or a universal character (such as '\u02C0').Certain characters in C# are preceded by a backslash. They have special meaning and they are used to represent like newline () or tab (\t).Example Live Demousing System; namespace Demo {    class MyApplication {       static void Main(string[] args) {          Console.WriteLine("Welcome\t to the website");          Console.ReadLine(); ... Read More