VB.NET CLng Example – Code Sample Syntax
VB.NET CLng Example – Code Sample Syntax
Purpose: – Illustrates using VB.NET CLng Code Example.
Description:
Converts positive and negative numbers into Long data type
Syntax:
CLng(expression)
CLng(expression)
Parameters | Description | expression | -9,223,372,036,854,775,808 through 9,223,372,036,854,775,807; fractional parts are rounded. |
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Result Data Type | Description | Long | returns 64-bit (8-byte) integers |
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Step 1: Click Visual Basic to Cut-n-paste code into clsCLng.vb
Public Class clsCLng Public Sub Main() '**************************************************************************************** ' Purpose: Converts positive and negative numbers into Long data type ' ' Syntax: CLng(expression) ' ' Parameter1: expression - -9,223,372,036,854,775,808 through 9,223,372,036,854,775,807; fractional parts are rounded. ' ' Result: Long - returns 64-bit (8-byte) integers ' ' '**************************************************************************************** ' This example is from http://idealprogrammer.com Console.WriteLine("Example #1: CLng(expression)") Dim Long1 As Long = CLng(1.33) Console.WriteLine(Long1) ' Returns 1 'write blank line to make output easier to read Console.WriteLine() Console.WriteLine("Example #2: CLng(expression)") Dim Long2 As Long = CLng(-3.4) Console.WriteLine(Long2) ' Returns -3 'write blank line to make output easier to read Console.WriteLine() Console.WriteLine("Example #3: CLng(expression)") Dim Long3 As Long = CLng(5.5) Console.WriteLine(CLng(Long3)) ' Returns 6 '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 myclsCLng As New clsCLng myclsCLng.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 “Functions”
- Right-click project name in solution explorer;
- add new folder;
- name of folder could be: Functions
- Add New subfolder named “ConversionFunctions”
- Right-click Functions folder in solution explorer;
- add new folder;
- name of folder could be: ConversionFunctions
- Add New subfolder named “TypeConversionFunctions”
- Right-click ConversionFunctions folder in solution explorer;
- add new folder;
- name of folder could be: TypeConversionFunctions
- Add Class Named clsCLng to TypeConversionFunctions folder
- Right-click TypeConversionFunctions folder;
- add new item;
- Select class
- Class name could be clsCLng
- Click on Visual Basic in code in step 1 above to copy code into clsCLng.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