Different Type of String Operations in .NET using C#

By Indibar Majhi

In .NET there are several types of string operations like – calculate length, substring operations, case change, replace, character array, string array. There are already predefined functions for these operations. Just we need to use it in the proper place.

In this post, we are going to discuss some popular operations of string. We will learn the following things with the proper example so that it becomes easier to understand for learners.

Convert CSV file to TXT file in DOT NET using vb (windows form)

Count the length of a string

Here we will count the length of the total string including blank space.

string str = "Welcome to Codespeedy";
Console.WriteLine(str.Length);

Output:

Length of the string:21

Find substring from a given string

Here we will find any particular portion from a given string.

string str = "Welcome to Codespeedy";
string result1 = str.Substring(11);       //Define only starting position. Print data from starting position to end of string
string result2 = str.Substring(0, 7);     //Define starting position, lentgh. Print data of that length from starting given position. 
Console.WriteLine(result1);
Console.WriteLine(result2);

Output:

Codespeedy
Welcome

Change case of a string

Here we will convert the string to UPPER case and LOWER case

string str = "Welcome to Codespeedy";
Console.WriteLine(str.ToLower());     //Convert to Lower case letter
Console.WriteLine(str.ToUpper());     //Convert to Upper case letter

Output:

welcome to codespeedy
WELCOME TO CODESPEEDY

Replace character of  a string

Here we will replace an old character with a new character in the given string

string str = "Welcome to Codespeedy";
Console.WriteLine(str.Replace('s', 'S'));

Output:

Welcome to CodeSpeedy

Convert string to a character array

Here we will convert a string to an array of characters

string str = "Welcome to Codespeedy";
char[] c = str.ToCharArray();
foreach (char item in c)
{
     Console.WriteLine(item);
}

Output:

W
e
l
c
o
m
e

t
o

C
o
d
e
s
p
e
e
d
y

Store a string to string array

Here we will store a string into an array of strings.

string str = "Welcome to Codespeedy";
string[] res1 = str.Split(' ');         //Split the string into different parts by seperator blankspace
foreach (string item in res1)
{
    Console.WriteLine(item);
}

Output:

Welcome
to
Codespeedy

N.B.: For code in vb please leave comment