VB.NET CBool – Code Sample Syntax Example
VB.NET CBool Example – Code Sample Syntax
Purpose: – Illustrates using VB.NET CBool Code Example.
Purpose:
Converts char, string, or numeric expression to boolean data type
Syntax:
CBool(expression)
CBool(expression)
Parameters | Description | expression | char, string, or numberic expression |
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Result Data Type | Description | Boolean | is false if input converts to 0; otherwise, it is true |
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Step 1: Click Visual Basic to Cut-n-paste code into clsCBool.vb
Public Class clsCBool Public Sub Main() '**************************************************************************************** ' Purpose: Converts char, string, or numeric expression to boolean data type ' ' Syntax: CBool(expression) ' ' Parameter1: expression - char, string, or numberic expression ' ' Result: Boolean - is false if input converts to 0; otherwise, it is true ' '**************************************************************************************** ' This example is from http://idealprogrammer.com Console.WriteLine("Example #1: CBool(string)") Console.WriteLine(CBool("True")) ' Returns True 'write blank line to make output easier to read Console.WriteLine() Console.WriteLine("Example #2: CBool(numeric expression)") Console.WriteLine(CBool(1)) ' Returns True '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 myclsCBool As New clsCBool myclsCBool.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 clsCBool to TypeConversionFunctions folder
- Right-click TypeConversionFunctions folder;
- add new item;
- Select class
- Class name could be clsCBool
- Click on Visual Basic in code in step 1 above to copy code into clsCBool.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