i want code for below specified condition

yes sir you are right i want the same code

please send me the code

Just to be clear, do you mean that the first DropDownList should always show the current month and the next two months?

So, for example, when we are in August, it should show August, September and October.

sorry sir there is small change in my requirement
i want in firstdropdownlist it must show only 3 months like july,August,October.
as we crosses the october  dropdownlist must show next three option  november December(year will be 2013)and January with year 2014

OK, the following code should deal with your second point:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!IsPostBack)
        {
            DateTime dt = DateTime.Today;
            int month = dt.Month;
            int year = dt.Year;
            string[] months = new string[14 - month];
            months[0] = "--Month--";
            int i = 1;
            while (dt.Year == year)
            {
                months[i] = dt.ToString("MMMM");
                dt = dt.AddMonths(1);
                i++;
            }
            DropDownList1.DataSource = months;
            DropDownList1.DataBind();
            DropDownList1.SelectedIndex = 0;
            DropDownList2.DataSource = new string[] { "--Day--" };
            DropDownList2.DataBind();
            DropDownList3.DataSource = new string[] { "--Year--" };
            DropDownList3.DataBind();       
        }
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (DropDownList1.SelectedIndex == 0)
        {
            DropDownList2.DataSource = new string[] { "--Day--" };
            DropDownList2.DataBind();
            DropDownList3.DataSource = new string[] { "--Year--" };
            DropDownList3.DataBind();
            return;
        }
        int month = DropDownList1.SelectedIndex + DateTime.Today.Month - 1;
        int year = DateTime.Today.Year;
        int daysInMonth = DateTime.DaysInMonth(year, month);
        if (month == DateTime.Today.Month)
        {
            int today = DateTime.Today.Day;
            DropDownList2.DataSource = Enumerable.Range(today, daysInMonth - today + 1);
        }
        else
        {
            DropDownList2.DataSource = Enumerable.Range(1, daysInMonth);
        }
        DropDownList2.DataBind();
        int[] years = { year };
        DropDownList3.DataSource = years;
        DropDownList3.DataBind();
    }
}

no sir,
 
in first dropdownlist it must contain current month to end and when crosses december it must show all months with year 2014 
i got really good answer from you.thank you very much.please send that code also.

OK, I've changed the code so that, if the user chooses a month before the current month, then next year will be assumed:

    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (DropDownList1.SelectedIndex == 0)
        {
            DropDownList2.DataSource = new string[] { "--Day--" };
            DropDownList2.DataBind();
            DropDownList3.DataSource = new string[] { "--Year--" };
            DropDownList3.DataBind();
            return;
        }

        int month = DropDownList1.SelectedIndex;
        int year = DateTime.Today.Year;
        if (month < DateTime.Today.Month) year++;
        int daysInMonth = DateTime.DaysInMonth(year, month);
        if (month == DateTime.Today.Month)
        {
            int today = DateTime.Today.Day;
            DropDownList2.DataSource = Enumerable.Range(today, daysInMonth - today + 1);
        }
        else
        {
            DropDownList2.DataSource = Enumerable.Range(1, daysInMonth);
        }
        DropDownList2.DataBind();
        int[] years = { year };
        DropDownList3.DataSource = years;
        DropDownList3.DataBind();
    }

On the second point, do you mean that only months from the current month to December would be shown in the first DropDownList and so the year would always be the current year?

ya sir,
if system date is december 2013 and if we select january means than the  year must be changed to 2014

one more thing  if i don't want months before the current month than how to implement that

That can be dealt with by changing the code to the following:

sir this code is working fine but when i select july its showing in dropdown  date from 1 to 31 but i require from current date to month end 

Try this revised version:

In this code i am getting one small problem 
when i run the code the firstdown shows the option "Junuary" but i want just ---Month--

below this month shoulb be display

Are you got the solution or any problem in your code

Source Code

Try this code:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string[] months = 
            {
               "January",
               "February",
               "March",
               "April",
               "May",
               "June",
               "July",
               "August",
               "September",
               "October",
               "November",
               "December"
            };

            DropDownList1.DataSource = months;
            DropDownList1.DataBind();
            DropDownList1.SelectedIndex = 0;
        }
    }

    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        int month = DropDownList1.SelectedIndex + 1;
        int year = DateTime.Today.Year;
        int daysInMonth = DateTime.DaysInMonth(year, month);
        DropDownList2.DataSource = Enumerable.Range(1, daysInMonth);
        DropDownList2.DataBind();
        if (month == DateTime.Today.Month) DropDownList2.SelectedIndex = DateTime.Today.Day - 1;
        int[] years = { DateTime.Today.Year };
        DropDownList3.DataSource = years;
        DropDownList3.DataBind();
    }
}

AutoPostBack for the DropDownLists should, of course, be set to true.

ok let me clear question first,
i have 3 dropdown list
first dropdownlistname month.
secand dropdownlistname day.
third dropdownlistname year.
if i select one option from month for example july than currrent day and year must be display
if i select other than july than date must show day from 1 to end and year


for example you can check below link.
http://www.toyotabharat.com/inen/forms/testdrive.aspx
just select any state in that page check
Preferred Date:

i am little bit confused about your requirement plz give clear requirement details. so we can able to solve your problem

Thanks for your reply but
sir its code to just select from dropdownlist and submit but it does't setisfy my condition

check this link

http://aspsnippets.com/Articles/Select-Day-Month-and-Year-Date-from-DropDownList-in-ASPNet.aspx