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C# FormatNumber Syntax Example - ASPNET CSharp String Method - Sample

Description: Here is a FormatNumber Example that illustrates the C# Syntax in ASP.NET.

Example Webform Code:

< %@ Page Language="C#" AutoEventWireup="true" CodeFile="FormatNumber.aspx.cs" Inherits="StringManipulation_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:label ID="Label2" runat="server" Text="Label"></asp:label><br />
    </div>
    </form>
</body>
</html>

Example Code Behind:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
// This example is from http://idealprogrammer.com
// It shows how you can use FormatNumber syntax in C-Sharp ASP.NET
//****************************************************************************************
// Syntax: 	FormatNumber (Expression As Object, _
// NumDigitsAfterDecimal As Integer, _
// IncludeLeadingDigit As TriState, _
// UseParensForNegativeNumbers As TriState, _
// GroupDigits As TriState _
// ) As String
//
// Returns expression formatted as a number
// 
// Expression - Required - Expression to be formatted
// 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.
// IncludeLeadingDigit - Optional. TriState enumeration that indicates whether or not a 
// leading zero is displayed for fractional values. 
// UseParensForNegativeNumbers - Optional. TriState enumeration that indicates whether 
// or not to place negative values within parentheses. 
// GroupDigits - Optional. TriState enumeration that indicates whether or not numbers are
// grouped using the group delimiter specified in the computer's regional settings. 
//****************************************************************************************
 
 
public partial class StringManipulation_FormatNumber : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "Example #1: 	FormatNumber (Expression As Object," + " NumDigitsAfterDecimal As Integer," + " IncludeLeadingDigit As TriState," + " UseParensForNegativeNumbers As TriState," + " GroupDigits As TriState " + " ) As String ";
        double dblNumber = -5432.43;
 
        // Returns "(5,432.430)".
        Label2.Text = Microsoft.VisualBasic.Strings.FormatNumber(dblNumber, 3, Microsoft.VisualBasic.TriState.UseDefault, Microsoft.VisualBasic.TriState.True, Microsoft.VisualBasic.TriState.True);
 
 
    }
}

Example Connection String: