VB.NET String Function Left()

VB.NET Left Example – Code Sample Syntax

Abstract: – Illustrates using .

 *** 1. Download Source Code *** 

VB.NET Syntax StringManipulation Left download Download Source Code for All VB Console Examples in One Project

 *** 2. Left Syntax *** 


Purpose:
Returns a string containing a specified number of characters from the left
side of a string.


Syntax:
Left(str As String, Length As Integer) As String

Parameters Description
str Required – String expression from which characters will be returned.
Length Required – Specifies number of characters to return.

Result Data Type Description
string Returns a string containing a specified number of characters from the left
side of a string.


 *** 3. Left – Quick Example *** 

Console.WriteLine(Left(“Ideal Programmer”, 5)) ‘ Returns Ideal

 *** 4. Left – Full Example *** 

Left Example Output Screenshot


VB.NET Syntax StringManipulation Left screenshot


Step 1: Click Visual Basic to Cut-n-paste code into clsLeft.vb

Public Class clsLeft
 
    Public Sub Main()
 
        '****************************************************************************************
        ' Purpose:  Returns a string containing a specified number of characters from the left
        ' side of a string.
        '
        ' Syntax: 	Left(str As String, Length As Integer) As String
        '
        ' Parameter1: str - Required - String expression from which characters will be returned.
        '
        ' Parameter2: Length - Required - Specifies number of characters to return.
        '
        ' Result: string - Returns a string containing a specified number of characters from the left
        ' side of a string.
        '
        ' Quick Example:   Console.WriteLine(Left("Ideal Programmer", 5)) ' Returns Ideal
        '
        '****************************************************************************************
 
 
        Console.WriteLine("Example #1: 	Left(str As String, Length As Integer) As String")
 
        Console.WriteLine(Left("Ideal Programmer", 5)) ' Returns Ideal
 
 
        'write blank line to make output easier to read
        Console.WriteLine()
 
 
 
        'Prevent console from closing before you press enter
        Console.ReadLine()
 
    End Sub
 
 
End Class

Step 2: Click Visual Basic to Cut-n-paste code into Module1.vb

Module Module1
 
    Sub Main()
 
 
        Dim myclsLeft As New clsLeft
        myclsLeft.Main()
 
 
 
    End Sub
 
End Module

Prerequistes:

  1. Install Visual Basic (Express or Standard Edition)
  2. Install SQL Server Express
  3. Download Northwind and pubs Database
  4. Attach Northwind Database to Databases in Sql Express
  5. Attach pubs Database to Databases in Sql Express

Notes:

  • Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
  • You can build a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Module1.vb

Instructions:
VB.NET Syntax StringManipulation Left

  1. Use Visual Basic 2010 Express or Standard Edition
  2. Create new project;
    • Click File/New Project
    • Select Console Application Template
    • Select Visual Basic for Language
    • name of project could be VBNET_Syntax.
  3. Add New folder named “StringManipulation”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: StringManipulation
  4. Add Class Named clsLeft to StringManipulation folder
    • Right-click StringManipulation folder;
    • add new item;
    • Select class
    • Class name could be clsLeft
  5. Click on Visual Basic in code in step 1 above to copy code into clsLeft.vb
  6. Click on Visual Basic in code in step 2 above to copy code into Module1.vb
  7. Click green arrow or press F5 to run program