c# - How to format a string as a date

String format date
string-format-date.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 a culture for english in us
        CultureInfo usCulture = new CultureInfo("en-US");

        CultureInfo frCulture = new CultureInfo("fr-FR");
        CultureInfo gbCulture = new CultureInfo("en-GB");
        CultureInfo dkCulture = new CultureInfo("da-DK");
        
        //this line create a datetime variable.
        DateTime now = DateTime.Now;
        Label1.Text = "now: " + now.ToString();

        //format string using ToString method.
        Label1.Text += "<br /><br />short date: " + now.ToString("d");
        Label1.Text += "<br />long date: " + now.ToString("D");
        Label1.Text += "<br />full date and short time: " + now.ToString("f");
        Label1.Text += "<br />full date and long time: " + now.ToString("F");
        Label1.Text += "<br />general date time (short time): " + now.ToString("g");
        Label1.Text += "<br />general date time (long time): " + now.ToString("G");
        Label1.Text += "<br />month pattern: " + now.ToString("M");
        Label1.Text += "<br />year pattern: " + now.ToString("Y");

        //string format date using string.format method.
        Label1.Text += "<br /><br />date time format in [en-US] culture: " + string.Format(usCulture, "{0:d}", now);
        Label1.Text += "<br />date time format in [fr-FR] culture: " + string.Format(frCulture, "{0:d}", now);
        Label1.Text += "<br />date time format in [en-GB] culture: " + string.Format(gbCulture, "{0:d}", now);
        Label1.Text += "<br />date time format in [da-DK] culture: " + string.Format(dkCulture, "{0:d}", now);
    }  
</script>  
  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head id="Head1" runat="server">  
    <title>c# example - string format date</title>  
</head>  
<body>  
    <form id="form1" runat="server">  
    <div>  
        <h2 style="color:MidnightBlue; font-style:italic;">  
            c# example - string format date
        </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 date"  
            OnClick="Button1_Click"
            Height="40"  
            Font-Bold="true"  
            />  
    </div>  
    </form>  
</body>  
</html>
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