Work With Time And Time Zone in Asp.net

Here i am writing a program to show time of different time zone. For More help download the code in zip fomat

Step 1> add a website and put a aspx page and add a dropdownlist and a label

Step 2> Create a function to bind dropdonlist with time zones and call this function to page load

    >>   Add some namespace as given

using System.Collections.ObjectModel;

using System.Data;

public void bindzone()

    {

        ReadOnlyCollection<TimeZoneInfo> timeZones = TimeZoneInfo.GetSystemTimeZones();

        Console.WriteLine("All time zones:");

        DataTable dt = new DataTable();

        dt.Columns.Add("Name");

        dt.Columns.Add("Id");

        dt.Rows.Add("Select Time Zone", "Select Time Zone");

        foreach (TimeZoneInfo timeZoneInfo in timeZones)

        {

            //Console.WriteLine("   {0}", timeZoneInfo.DisplayName);

           // ListBox1.Items.Add(timeZoneInfo.DisplayName.ToString());

            dt.Rows.Add(timeZoneInfo.DisplayName.ToString(), timeZoneInfo.Id.ToString());

        }

        DropDownList1.DataTextField = "Name";

        DropDownList1.DataValueField = "Id";

        DropDownList1.DataSource = dt;

        DropDownList1.DataBind();

    }

call it to pageload

protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            bindzone();

        }

       

    }

Step 3> True autopostback of dropdownlist

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" 

            Font-Bold="True" ForeColor="Maroon" Height="29px" 

            onselectedindexchanged="DropDownList1_SelectedIndexChanged">

        </asp:DropDownList>

Step 4> Create another function to display the result

 public void convertdatetime(string timezone)

    {

        DateTimeOffset nowDateTime = DateTimeOffset.Now;

        DateTimeOffset newDateTime = TimeZoneInfo.ConvertTime(nowDateTime, TimeZoneInfo.FindSystemTimeZoneById(timezone.ToString()));

       

        Label1.Text = " Time Is : " + newDateTime.ToString();

    }

Step 5> go to dropdownlist event +double click on selectedindexchange and write this code..

 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)

    {

        if (DropDownList1.SelectedItem.ToString() != "Select Time Zone")

            convertdatetime(DropDownList1.SelectedValue.ToString());

        else

            Label1.Text = "Please Select A valid Time Zone!!!";

    }

Now Run the site and check it.

For More help download the code in zip