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C# String

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What is C# String ?

  • In c#, a string is an object of type String whose value is text. Internally, the text is stored as a sequential read-only collection of Char objects.
  • There is no null-terminating character at the end of a C# string; so, a C# string can contain any number of embedded null characters ('\0').
  • The String is an immutable sequence of characters.
  • He StringBuilder is a mutable sequence of characters.
  • The string keyword is an alias for the System.String class.
 C# String

C# String

Create a string

  • There are several ways to construct strings in C#:
    • Create a string using a constructor.
    • Create a string from a literal.
    • Create a string using concatenation.
    • Create a string using a property or a method.
    • Create a string using formatting.

String Class Properties in C#:

  • The String class has the following two types of string properties:
    • Char
    • Length

Char:

  • Strings contain characters. These char values can be accessed with an indexer expression in the C# language.
  • Gets the Char object at a specified position in the current String object.
  • "Char Objects and Unicode Characters" section in the String class overview. In C#, the Chars property is an indexer.

Length:

  • Gets the number of characters in the current String object.
String functions Definitions
Clone() Create a clone of string.
Compareto() Compareto() specifies to compare two strings and returns integer value as output. It returns 0 for true and 1 for false.
Contains() The C# contains() method checks whether specified character or string is existing or not in the string value.
Endswith() In strings the endswith() method checks whether specified to character is the last character of string or not.
Equals() The equals() method in C# compares two string and returns boolean value as output.
Gethashcode() Gethashcode() method returns hashvalue of specified string.
Gettype() Gettype() method returns the system.type of current instance.
Gettypecode() It returns the stystem.typecode for class system.string.
Indexof() Returns the index position of first occurrence of specified character.
Tolower() It converts string into lower case based on rules of the current principles.
Toupper() Toupper() method converts string into upper case based on rules of the current method.
Insert() Insert the string or character in the string at the specified position.
Isnormalized() This method checks whether this string is in unicode standardization form C.
Lastindexof() Returns the index position of last occurrence of specified character.
Length It is a string property that returns length of string.
Remove() This method deletes all the characters from beginning to specified index position.
Replace() This method replaces the character.
Split() This method splits the string based on specified value.
Startswith() It checks whether the first character of string is same as specified character.
Substring() This method returns substring.
Tochararray() Converts string into char array.
Trim() It removes extra whitespaces from beginning and ending of string.

C# Sample Code - C# Examples:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace wikitechy_string
{
    class Program
    {
        static void Main(string[] args)
        {
            string Name1 = "wikitechy";
            string Name2 = "string";
            string age = "22";
            Console.WriteLine(" First Name: {0}", Name1);
    Console.WriteLine(" Last Name: {0}", Name2);
    Console.WriteLine(" Age: {0}", age);
   Console.ReadKey();
}

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Code Explanation:

 c sharp string
  1. It defines a string variable named Name1 and then assigns text value "wikitechy" to it.
  2. Here it defines a string variable named Name2 and then assigns text value "string" to it.
  3. Here it defines a string variable named age and then assigns text value "22" to it.
  4. In Console.WriteLine, the Main method specifies its behavior with the string statement "First Name, Last Name, Age:" assigned in the text values on the screen.

Sample C# examples - Output :

 string class in c#
  1. Were in this output, we have shown the "first Name: wikitechy", which specifies to name1 variable is assigned to the wikitechy name.
  2. Here in this output, we have shown the "Last Name: string", which specifies to name2 variable is assigned to the string name.
  3. In this output, we have shown the "Age: 22" which specifies to age variable is assigned to the value of 22.

c# strings :

learn c# - c# tutorial - c# strings - c# examples -  c# programs
learn c# - c# tutorial - c# strings - c# examples -  c# programs
learn c# - c# tutorial - c# strings - c# examples -  c# programs
learn c# - c# tutorial - c# strings - c# examples -  c# programs

c# collections :

  • BitArray class
    • Stores a collection of bit values represented as Booleans
  • HashTable class
    • Stores a collection of key/value pairs that are organized based on the hash code of the key
  • Queue class
    • Represents a FIFO (first in, first out) collection
  • Stack class
    • Represents a simple LIFO (last in, first out) collection


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