Convert Number to string with Thousand Separator in C# and VB.Net

Hey micah,

Please refer below sample.

HTML

<div>
    Inetger Amount:
    <asp:Label ID="lblAmountInteger" runat="server" /><br />
    Decimal Amount:
    <asp:Label ID="lblAmountDecimal" runat="server" />
</div>

Namespaces

C#

using System.Globalization;

VB.Net

Imports System.Globalization

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    int amountInInteger = 1200000;
    double amountIndecmal = 1200000.00;
    string amountInInetgerFormat = amountInInteger.ToString("#,##0");// for integer value
    string amountInDecimalFormat = amountIndecmal.ToString("N", new CultureInfo("en-US"));// for decimal value
    lblAmountInteger.Text = amountInInetgerFormat;
    lblAmountDecimal.Text = amountInDecimalFormat;
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Dim amountInInteger As Integer = 1200000
    Dim amountIndecmal As Double = 1200000.0
    Dim amountInInetgerFormat As String = amountInInteger.ToString("#,##0")
    Dim amountInDecimalFormat As String = amountIndecmal.ToString("N", New CultureInfo("en-US"))
    lblAmountInteger.Text = amountInInetgerFormat
    lblAmountDecimal.Text = amountInDecimalFormat
End Sub

Namespaces