c# - How to format a string as currency with dollar sign

String format currency with dollar sign
string-format-currency-with-dollar-sign.aspx

<%@ Page Language="C#" AutoEventWireup="true"%>
<%@ Import Namespace="System.Globalization" %>  

<!DOCTYPE html>  
<script runat="server"> 
    protected void Button1_Click(object sender, System.EventArgs e)  
    {
        //this line create an int variable.
        int number = 124;

        CultureInfo usCulture = new CultureInfo("en-US");
        
        //this line create a decimal variable.
        decimal decimalValue = 431.86M;

        //this line create a double variable.
        double doubleValue = 666.15;

        Label1.Text = "Integer: " + number;
        Label1.Text += "<br />Decimal: " + decimalValue;
        Label1.Text += "<br />Double: " + doubleValue;

        Label1.Text += "<br /><br />string format currency with dollar sign..............";
        //format string using ToString method.
        Label1.Text += "<br />integer: " + number.ToString("c");
        Label1.Text += "<br />integer: " + number.ToString("c0");
        Label1.Text += "<br />decimal value: " + decimalValue.ToString("c");
        Label1.Text += "<br />double value: " + doubleValue.ToString("c");

        //format string using string.format method.
        Label1.Text += "<br /><br />format integer using string.format method: " + string.Format("{0:c0}", number);
        Label1.Text += "<br />format integer with [en-US] culture: " + string.Format(usCulture, "{0:c0}", number);
    }  
</script>  
  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head id="Head1" runat="server">  
    <title>c# example - string format currency with dollar sign</title>  
</head>  
<body>  
    <form id="form1" runat="server">  
    <div>  
        <h2 style="color:MidnightBlue; font-style:italic;">  
            c# example - string format currency with dollar sign
        </h2>  
        <hr width="550" align="left" color="Gainsboro" />  
        <asp:Label   
            ID="Label1"   
            runat="server"  
            Font-Size="Large"  
            >  
        </asp:Label>  
        <br /><br />
        <asp:Button   
            ID="Button1"   
            runat="server"   
            Text="string format currency with dollar sign"  
            OnClick="Button1_Click"
            Height="40"  
            Font-Bold="true"  
            />  
    </div>  
    </form>  
</body>  
</html>
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