In this article we will learn how to use string
functions in VB.NET.
String Function - These are the
following sting functions.
1.
The
Len Function
The length function is used to find out the
number of characters in any given string.
Syntax
Len(string)
2. The Mid function
The mid function is used to Return a substring
containing a specified number of characters from a string.
Syntax
Mid (string, start[, length])
string - String expression from which
characters are returned.
start - Long. Character position in string at which the part to be taken
begins.
length - Length is Optional. Number of
characters to return.
3. The Left Function
The Left function extract the
left portion of a string.
Syntax
Left("string", n)
4. The Right Function
The Right function extract
the right portion of a string.
Syntax
Right("string", n)
5. The Space Function
The space function is used to Return a string
containing the specified number of blank spaces.
Syntax
Space (number)
6. The Replace Function
The replace function is used to
replacing some text in a string with some other text.
Syntax
Replace( string, searchtext, replacetext )
7. The Trim function
The trim function trims the
empty spaces on both side of the String.
Syntax
Trim ("String")
8. The Ltrim Function
The Ltrim function trims the
empty spaces of the left portion of the string.
Syntax
Ltrim("string")
9.
The Rtrim Function
The Rtrim function trims the
empty spaces of the Right portion of the string.
Syntax
Rtrim("string")
10. The Ucase and the Lcase Functions
The Ucase function converts all the characters of a string to capital letters.
On the other hand, the Lcase function converts all the characters of a string to
small letters.
For Example - This example defines all the
above function.
Module
Module1
Sub Main()
Dim leng As
String = Len(" Rohatash kumar")
Console.WriteLine("length
is :" & leng)
Dim middle As
String = Mid("Rohatash
Kumar", 3, 4)
Console.WriteLine("Mid
is :" & middle)
Dim leftf As
String = Left("Rohatash
Kumar", 3)
Console.WriteLine("Left
is:" & leftf)
Dim rightr As
String = Right("rohatash
kumar", 6)
Console.WriteLine("Right
is :" & rightr)
Dim spaces As
String = Right("rohatash
kumar", 7)
Console.WriteLine("Space
is :" & spaces)
Dim replaces As
String = Replace("rohatash
kumar", "hat",
"nmo")
Console.WriteLine("Replace
is :" & replaces)
Dim trimt As
String = Trim("
rohatash kumar ")
Console.WriteLine("Trim
is :" & trimt)
Dim ltriml As
String = LTrim("
rohatash kumar ")
Console.WriteLine("ltrim
is :" & ltriml)
Dim rtrimr As
String = RTrim("
rohatash kumar ")
Console.WriteLine("rtrim
is :" & rtrimr)
Dim ucaseu As
String = UCase("rohatash
kumar")
Console.WriteLine("Ucase
is :" & ucaseu)
Dim lcasel As
String = LCase("ROHATASH
KUMAR")
Console.WriteLine("Ucase
is :" & lcasel)
End Sub
End
Module
Now run the console application.
Figure 1.