Populate hours, minutes and seconds in Asp.net DropDownList

While working on asp.net project, we have the requirement to select time manually in hh: mm:SS (hours (24), minutes (59) and seconds (59)) in two digit format e.g. 00: 01: 02 etc in 3 different drop down list controls. So that user can select hour, minute and seconds manually.

In this article I will explain how to populate 3 different dropdownlist controls with time in the form of hours, minutes and seconds in asp.net using both C# and VB Languages.

Asp.Net C# Section

In the design section place 3 dropdownlist controls as:

<div>

        <fieldset style="width:400px;">

            <legend style="font-weight: 700">Populate Hour,Minute and Seconds in DropDownList</legend>

            <br />

            Hours:

            <asp:DropDownList ID="ddlHours" runat="server">

            </asp:DropDownList>

            Minutes:

            <asp:DropDownList ID="ddlMinutes" runat="server">

            </asp:DropDownList>

            Seconds:

            <asp:DropDownList ID="ddlSeconds" runat="server">

            </asp:DropDownList>

            <br />

        </fieldset>

    </div>

Asp.Net C# code to fill hours, minutes & seconds in DropDownList

protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            PopulateHours();

            PopulateMinutes();

            PopulateSeconds();

        }

    }

    private void PopulateHours()

    {

        for (int i = 0; i <= 24; i++)

        {

            ddlHours.Items.Add(i.ToString("D2"));

        }       

    }

    private void PopulateMinutes()

    {

        for (int i = 0; i < 60; i++)

        {

            ddlMinutes.Items.Add(i.ToString("D2"));

        }

    }

    private void PopulateSeconds()

    {

        for (int i = 0; i < 60; i++)

        {

            ddlSeconds.Items.Add(i.ToString("D2"));

        }

    }

Asp.Net VB code to bind hours, minutes & seconds in DropDownList

Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load

        If Not Page.IsPostBack Then

            PopulateHours()

            PopulateMinutes()

            PopulateSeconds()

        End If

    End Sub

    Private Sub PopulateHours()

        For i As Integer = 0 To 24

            ddlHours.Items.Add(i.ToString("D2"))

        Next

    End Sub

    Private Sub PopulateMinutes()

        For i As Integer = 0 To 59

            ddlMinutes.Items.Add(i.ToString("D2"))

        Next

    End Sub

    Private Sub PopulateSeconds()

        For i As Integer = 0 To 59

            ddlSeconds.Items.Add(i.ToString("D2"))

        Next

    End Sub