VB.NET CObj Example – Code Sample Syntax
VB.NET CObj Example – Code Sample Syntax
Purpose: – Illustrates using VB.NET CObj Code Example.
Description:
Converts any valid expression into Object data type
Syntax:
CObj(expression)
CObj(expression)
Parameters | Description | expression | any valid expression |
---|
Result Data Type | Description | object | returns input as an object |
---|
Step 1: Click Visual Basic to Cut-n-paste code into clsCObj.vb
Public Class clsCObj Public Sub Main() '**************************************************************************************** ' Purpose: Converts any valid expression into Object data type ' ' Syntax: CObj(expression) ' ' Parameter1: expression - any valid expression ' ' Result: object - returns input as an object ' ' '**************************************************************************************** ' This example is from http://idealprogrammer.com Console.WriteLine("Example #1: CObj(expression)") Dim Object1 As Object = CObj("Ideal") Console.WriteLine(Object1) ' Returns Ideal 'write blank line to make output easier to read Console.WriteLine() Console.WriteLine("Example #2: CObj(expression)") Dim Object2 As Object = CObj(-3.4) Console.WriteLine(Object2) ' Returns -3.4 'write blank line to make output easier to read Console.WriteLine() Console.WriteLine("Example #3: CObj(expression)") Dim Object3 As Object = CObj(5.5) Console.WriteLine(CObj(Object3)) ' Returns 5.5 '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 myclsCObj As New clsCObj myclsCObj.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 clsCObj to TypeConversionFunctions folder
- Right-click TypeConversionFunctions folder;
- add new item;
- Select class
- Class name could be clsCObj
- Click on Visual Basic in code in step 1 above to copy code into clsCObj.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