VB.NET Len() – Code Sample
Posted by asp.net videos on Monday, February 7, 2011 · Leave a Comment
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VB.NET Len Example – Code Sample Syntax
Abstract: – Illustrates using VB.NET Len Code Example.
*** 2. Len Syntax ***
Purpose:
Returns the number of characters in a string.
Syntax:
Len(string)
Parameters |
Description |
string |
Required – String of which you want to know the length
|
Result Data Type |
Description |
integer |
Returns the number of characters in a string.
|
*** 3. Len – Quick Example ***
|
Dim strField As String = ” This “
Console.WriteLine(Len(strField)) ‘Returns 6 – spaces are counted
|
*** 4. Len – Full Example ***
Len Example Output Screenshot
Step 1: Click Visual Basic to Cut-n-paste code into clsLen.vb
Public Class clsLen
Public Sub Main()
'****************************************************************************************
' Purpose: Returns the number of characters in a string.
'
' Syntax: Len(string)
'
' Parameter1: string - Required - String of which you want to know the length
'
' Result: integer - Returns the number of characters in a string.
'
' Quick Example: Dim strField As String = " This "
' Console.WriteLine(Len(strField)) 'Returns 6 - spaces are counted
'
'****************************************************************************************
Console.WriteLine("Example #1: Len(strField)")
Dim strField As String = " This "
Console.WriteLine(Len(strField)) 'Returns 6 - spaces are counted
'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 |
Public Class clsLen
Public Sub Main()
'****************************************************************************************
' Purpose: Returns the number of characters in a string.
'
' Syntax: Len(string)
'
' Parameter1: string - Required - String of which you want to know the length
'
' Result: integer - Returns the number of characters in a string.
'
' Quick Example: Dim strField As String = " This "
' Console.WriteLine(Len(strField)) 'Returns 6 - spaces are counted
'
'****************************************************************************************
Console.WriteLine("Example #1: Len(strField)")
Dim strField As String = " This "
Console.WriteLine(Len(strField)) 'Returns 6 - spaces are counted
'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 myclsLen As New clsLen
myclsLen.Main()
End Sub
End Module |
Module Module1
Sub Main()
Dim myclsLen As New clsLen
myclsLen.Main()
End Sub
End Module
Prerequistes:
- Install Visual Basic (Express or Standard Edition)
- Install SQL Server Express
- Download Northwind and pubs Database
- Attach Northwind Database to Databases in Sql Express
- 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:
- Use Visual Basic 2010 Express or Standard Edition
- Create new project;
- Click File/New Project
- Select Console Application Template
- Select Visual Basic for Language
- name of project could be VBNET_Syntax.
- Add New folder named “StringManipulation”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: StringManipulation
- Add Class Named clsLen to StringManipulation folder
- Right-click StringManipulation folder;
- add new item;
- Select class
- Class name could be clsLen
- Click on Visual Basic in code in step 1 above to copy code into clsLen.vb
- Click on Visual Basic in code in step 2 above to copy code into Module1.vb
- Click green arrow or press F5 to run program
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