VB.NET ASP.NET FormatNumber() Source Code Syntax Example

Posted by on Sunday, February 20, 2011 · Leave a Comment 

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

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


 *** 1. Download Source Code *** 

VB.NET Syntax StringManipulation FormatNumber download Download Source Code for All VB ASP.NET Examples in One Project – source code for hundreds of VB.NET ASP.NET examples neatly organized in a single project.


 *** 2. FormatNumber Syntax *** 


Purpose:
Returns expression formatted as a number


Syntax:
FormatNumber (Expression As Object, _
NumDigitsAfterDecimal As Integer, _
IncludeLeadingDigit As TriState, _
UseParensForNegativeNumbers As TriState, _
GroupDigits As TriState _
) As String

ParametersDescription
ExpressionRequired – Expression to be formatted
NumDigitsAfterDecimalOptional – Numeric value indicating how
many places are displayed to the right of the decimal. Default value is –1,
which indicates that the computers regional settings are used.
IncludeLeadingDigitOptional. TriState enumeration that
indicates whether or not a leading zero is displayed for fractional values.
UseParensForNegativeNumbersOptional. TriState enumeration
that indicates whether or not to place negative values within parentheses.
GroupDigitsOptional. TriState enumeration that indicates
whether or not numbers are grouped using the group delimiter specified
in the computers regional settings.

Result Data TypeDescription
stringReturns string formatted as a number



 *** 3. FormatNumber – Quick Example *** 

Dim dblNumber As Double = -5432.43
' Returns "(5,432.430)".
Label1.Text = FormatNumber(dblNumber, 3, , TriState.True, TriState.True)


 *** 4. FormatNumber – Full Example *** 

FormatNumber Example Output Screenshot


VB.NET Syntax StringManipulation FormatNumber screenshot


Step 1: Click on Visual Basic to Cut-n-paste code into FormatNumber.aspx.vb
 Visual Basic |  copy code |? 
Imports System
Imports System.IO
Imports System.Data
 
 
' This example is from http://idealprogrammer.com
' It shows how you can use FormatNumber syntax in VB.NET ASP.NET
'****************************************************************************************
' Purpose:  Returns expression formatted as a number
'
' Syntax: 	FormatNumber (Expression As Object, _
' NumDigitsAfterDecimal As Integer, _
' IncludeLeadingDigit As TriState, _
' UseParensForNegativeNumbers As TriState, _
' GroupDigits As TriState _
' ) As String
'
' Parameter1: Expression - Required - Expression to be formatted
'
' Parameter2: NumDigitsAfterDecimal - Optional - Numeric value indicating how 
' many places are displayed to the right of the decimal. Default value is –1, 
' which indicates that the computer's regional settings are used.
'
' Parameter3: IncludeLeadingDigit - Optional. TriState enumeration that 
' indicates whether or not a leading zero is displayed for fractional values. 
'
' Parameter4: UseParensForNegativeNumbers - Optional. TriState enumeration 
' that indicates whether or not to place negative values within parentheses. 
'
' Parameter5: GroupDigits - Optional. TriState enumeration that indicates 
' whether or not numbers are grouped using the group delimiter specified 
' in the computer's regional settings. 
'
' Result: string - Returns string formatted as a number
'
' Quick Example:  Dim dblNumber As Double = -5432.43
' ' Returns "(5,432.430)".
' Label1.Text = FormatNumber(dblNumber, 3, , TriState.True, TriState.True)
'
' 
'****************************************************************************************
 
Partial Class _FormatNumber
    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: 	FormatNumber (Expression As Object," & _
       " NumDigitsAfterDecimal As Integer," & _
       " IncludeLeadingDigit As TriState," & _
        " UseParensForNegativeNumbers As TriState," & _
       " GroupDigits As TriState " & _
        " ) As String "
        Dim dblNumber As Double = -5432.43
 
        ' Returns "(5,432.430)".
        Label2.Text = Microsoft.VisualBasic.FormatNumber(dblNumber, 3, , TriState.True, TriState.True)
 
    End Sub
End Class

 
 Step 2: Click on XML to Cut-n-paste code into FormatNumber.aspx
 XML |  copy code |? 
< %@ Page Language="VB" AutoEventWireup="false" CodeFile="FormatNumber.aspx.vb" Inherits="_FormatNumber" %>
 
< !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 StringManipulation FormatNumber
  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 "StringManipulation"
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: StringManipulation
  4. Add Web Form Named FormatNumber to StringManipulation folder
    • Right-click StringManipulation folder;
    • add new item;
    • Select Web Form
    • Check place code behind in separate file
    • Web Form name could be FormatNumber
  5. Click on Visual Basic in step 1 at the top of this page to copy code into code-behind FormatNumber.aspx.vb
  6. Click on XML in step 2 above to copy code into web form FormatNumber.aspx
  7. Right-click on FormatNumber.aspx in solution explorer and select view in browser
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