using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;
using ASPNET.StarterKit.BusinessLogicLayer;

public partial class Calendar_aspx : Page {
  public string controlToEdit;
  public string isPostBack;


  public Calendar_aspx() {
    LoadComplete += new EventHandler(Page_LoadComplete);
  }

  void Page_Load(object sender, EventArgs e) {
    if (!Page.IsPostBack) {
      controlToEdit = Request.QueryString["controlID"];
      Session.Add("controlToEdit", controlToEdit);
      isPostBack = Request.QueryString["isPostBack"];
      Session.Add("isPostBack", isPostBack);


      // Cast first day of the week from web.config file.  Set it to the calendar
      Cal.FirstDayOfWeek = (System.Web.UI.WebControls.FirstDayOfWeek)Convert.ToInt32(ConfigurationManager.AppSettings["FirstDayOfWeek"]);

      // Select the Correct date for Calendar from query string
      // If fails, pick the current date on Calendar
      try {
        Cal.SelectedDate = Cal.VisibleDate = Convert.ToDateTime(lblDate.Text);
      }
      catch {
        Cal.SelectedDate = Cal.VisibleDate = DateTime.Today;
      }

      // Fills in correct values for the dropdown menus
      FillCalendarChoices();
      SelectCorrectValues();
    }
    else {

      if (Session["controlToEdit"] != null)
        controlToEdit = (string)Session["controlToEdit"];


      if (Session["isPostBack"] != null)
        isPostBack = (string)Session["isPostBack"];
    }
  }
  void Page_LoadComplete(object sender, System.EventArgs e) {
    OKButton.OnClientClick = "javascript:window.opener.SetControlValue('" + this.controlToEdit + "','" + lblDate.Text + "','" + this.isPostBack + "');";
  }

  protected void FillCalendarChoices() {
    DateTime thisdate = (DateTime.Now).AddYears(5); ;
  
    // Fills in month values
    for (int x = 0; x < 12; x++) {
      // Loops through 12 months of the year and fills in each month value
      ListItem li = new ListItem(thisdate.ToString("MMMM"), thisdate.Month.ToString());
      MonthSelect.Items.Add(li);
      thisdate = thisdate.AddMonths(1);
    }

    // Fills in year values and change y value to other years if necessary
    for (int y = 2000; y <= thisdate.Year; y++) {
      YearSelect.Items.Add(y.ToString());
    }
  }

  protected void SelectCorrectValues() {
    lblDate.Text = Cal.SelectedDate.ToShortDateString();
    datechosen.Value = lblDate.Text;
    MonthSelect.SelectedIndex = MonthSelect.Items.IndexOf(MonthSelect.Items.FindByValue(Cal.SelectedDate.Month.ToString()));
    YearSelect.SelectedIndex = YearSelect.Items.IndexOf(YearSelect.Items.FindByValue(Cal.SelectedDate.Year.ToString()));
  }

  protected void Cal_SelectionChanged(object sender, System.EventArgs e) {
    Cal.VisibleDate = Cal.SelectedDate;
    SelectCorrectValues();
  }

  protected void MonthSelect_SelectedIndexChanged(object sender, System.EventArgs e) {
    Cal.SelectedDate = Cal.VisibleDate
        = new DateTime(Convert.ToInt32(YearSelect.SelectedItem.Value),
                       Convert.ToInt32(MonthSelect.SelectedItem.Value), 1); ;
    SelectCorrectValues();
  }

  protected void YearSelect_SelectedIndexChanged(object sender, System.EventArgs e) {
    Cal.SelectedDate = Cal.VisibleDate
        = new DateTime(Convert.ToInt32(YearSelect.SelectedItem.Value),
                       Convert.ToInt32(MonthSelect.SelectedItem.Value), 1); ;
    SelectCorrectValues();
  }
}