CLng Example Syntax VB.NET ASP.NET | CLng | Source Code

Posted by on Saturday, May 14, 2011 · Leave a Comment 

CLng Example Syntax VB.NET ASP.NET | CLng | Source Code

Summary: – Illustrates using with in VB.NET ASP.NET.


View Other VB.NET ASP.NET Source Code Examples


Purpose:
Converts positive and negative numbers into Long data type

Syntax:
CLng(expression)

Parameters Description
expression -9,223,372,036,854,775,808 through 9,223,372,036,854,775,807; fractional parts are rounded.

Result Data Type Description
Long returns 64-bit (8-byte) whole number integers

Quick Example
Dim Long1 As Long = CLng(1.33)
TextBox1.Text = Long1 Returns 1

Step 1: Click on Visual Basic to Cut-n-paste code into CLng.aspx.vb

Imports System
Imports System.IO
Imports System.Data
 
'****************************************************************************************
' 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) whole number integers 
'
' Quick Example: Dim Long1 As Long = CLng(1.33)
'        TextBox1.Text = Long1 ' Returns 1
'
'****************************************************************************************
' This example is from http://idealprogrammer.com
 
 
Partial Class _CLng
    Inherits System.Web.UI.Page
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
 
        Label1.Text = "Example #1: 	CLng(1.33) "
 
        Dim Long1 As Long = CLng(1.33)
 
        TextBox1.Text = Long1 ' Returns 1
 
        Label2.Text = "Example #2: 	CLng(-3.4) "
 
        Dim Long2 As Long = CLng(-3.4)
 
        TextBox2.Text = Long2 ' Returns -3
 
        Label3.Text = "Example #3: 	CLng(5.5)"
 
        Dim Long3 As Long = CLng(5.5)
 
        TextBox3.Text = Long3 ' Returns 6
 
 
    End Sub
End Class

Step 2: Click on XML to Cut-n-paste code into CLng.aspx

< %@ Page Language="VB" AutoEventWireup="false" CodeFile="CLng.aspx.vb" Inherits="_CLng" %>
 
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h1><asp:label ID="Label1" runat="server" Text="Label"></asp:label> </h1>
         <asp:textbox ID="TextBox1" runat="server"></asp:textbox><br />
          <h1><asp:label ID="Label2" runat="server" Text="Label"></asp:label> </h1>
         <asp:textbox ID="TextBox2" runat="server"></asp:textbox><br />
          <h1><asp:label ID="Label3" runat="server" Text="Label"></asp:label> </h1>
         <asp:textbox ID="TextBox3" runat="server"></asp:textbox><br />
 
 
 
    </div>
    </form>
</body>
</html>

Prerequistes:

  1. Install Visual Web Developer 2010
  2. Install SQL Server Express
  3. Download Northwind and Pubs Databases
  4. Attach Northwind Database to Databases in Sql Express
  5. Attach pubs Database to Databases in Sql Express

Notes:

  • You can build your own library of syntax examples by using same web site over and over and just add new web forms to it.

Instructions:

VB.NET ASP.NET Syntax Functions CLng
  1. Use Visual Web Developer 2010
  2. Create new web site;
    • Click File/New Web Site
    • Select ASP.NET Website Template
    • Select Visual Basic for Language
    • name of Web Site could be VBNET_ASPNET_Syntax.
  3. Add New folder named “Functions”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: Functions
  4. Add New subfolder named “ConversionFunctions”
    • Right-click Functions folder in solution explorer;
    • add new folder;
    • name of folder could be: ConversionFunctions
  5. Add New subfolder named “TypeConversionFunctions”
    • Right-click ConversionFunctions folder in solution explorer;
    • add new folder;
    • name of folder could be: TypeConversionFunctions
  6. Add Web Form Named CLng to TypeConversionFunctions folder
    • Right-click TypeConversionFunctions folder;
    • add new item;
    • Select Web Form
    • Check place code behind in separate file
    • Web Form name could be CLng
  7. Click on Visual Basic in step 1 at the top of this page to copy code into code-behind CLng.aspx.vb
  8. Click on XML in step 2 above to copy code into web form CLng.aspx
  9. Right-click on CLng.aspx in solution explorer and select view in browser

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