Hello All ,

I am writing this code to generate dropdownlist for a month and year and then 31 checkboxes for each day of the month. There are 6 rows like this. After that i wanted that as soon as a user selects month and year all the checkboxes for sundays of that particular month should get disabled and replaced by "s" for that i had added label also and it worked but it is giving strange behavious when the first day of a month is Sunday for example for month = 5 and year = 2011 it displays right for that row but as soon as i select another month in the next row ddl of first row month gets deleted and moreover checkbox of 1 which was disabled also get visible.

Please can any one help me out to resolve this issue ? thanks in advance. Below is the code which i am using.



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;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
          for (int i = 0; i <= 6; i++)
            {
                TableRow t1 = new TableRow();
                tbltemp.Rows.Add(t1);
                for (int j = 0; j <= 31; j++)
                {
                    TableCell tc = new TableCell();
                    if (i == 0 && j == 0)
                    {
                        tc.Text = "Month / Year";
                        t1.Cells.Add(tc);
                    }
                    else if (i == 0)
                    {
                        tc.Text = Convert.ToString(j);
                        t1.Cells.Add(tc);
                    }

                    else if (j != 0)
                    {
                        CheckBox chk = new CheckBox();
                        chk.ID = "chk" + i + j;
                        chk.Enabled = true;
                        Label lbl = new Label();
                        lbl.ID = "lbl" + i + j;
                        lbl.Text = "";
                        lbl.Visible = false;
                        tc.Controls.Add(chk);
                        tc.Controls.Add(lbl);
                        t1.Cells.Add(tc);

                    }
                    if (i > 0 && j == 0)
                    {

                        DropDownList ddl1 = new DropDownList();
                        ddl1.SelectedIndexChanged += new EventHandler(ddl1_SelectedIndexChanged);
                        ddl1.AutoPostBack = true;
                        ddl1.ID = "ddlMonth" + i + "1";

                        ddl1.Items.Add("Select");
                        for (int k = 1; k <= 12; k++)
                            ddl1.Items.Add(k.ToString());
                        tc.Controls.Add(ddl1);
                        t1.Cells.Add(tc);

                        DropDownList ddl2 = new DropDownList();
                        ddl2.SelectedIndexChanged += new EventHandler(ddl2_SelectedIndexChanged);

                        ddl2.AutoPostBack = true;

                        ddl2.ID = "ddlYear" + i + "2";
                        int cyear = DateTime.Now.Year; ;
                        ddl2.Items.Add("Select");
                        for (int x = cyear; x <= cyear + 10; x++)
                            ddl2.Items.Add(x.ToString());
                        tc.Controls.Add(ddl2);
                        t1.Cells.Add(tc);


                    }

                }
            }


            protected void ddl2_SelectedIndexChanged(object sender, EventArgs e)
    {

        DropDownList ddlY = (DropDownList)sender;
        string ddlname = ddlY.ID.ToString();
        string abc = ddlname.Substring(7, 1);
        int a = Convert.ToInt32(abc);

        string month = "ddlMonth" + a + "1";
        DropDownList ddlM = (DropDownList)tbltemp.FindControl(month);
        if (ddlM.SelectedValue.ToString() != "Select" && ddlY.SelectedValue.ToString() != "Select")
        {

            int intMonth = Convert.ToInt32(ddlM.SelectedValue);
            int intYear = Convert.ToInt32(ddlY.SelectedValue);

            MarkSundays(intMonth, intYear, a);
                   }

    }


    protected void ddl1_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList ddlM = (DropDownList)sender;
        string ddlname = ddlM.ID.ToString();
        string abc = ddlname.Substring(8, 1);
        int a = Convert.ToInt32(abc);

        string year = "ddlYear" + a + "2";
        DropDownList ddlY = (DropDownList)tbltemp.FindControl(year);
        if (ddlM.SelectedValue.ToString() != "Select" && ddlY.SelectedValue.ToString() != "Select")
        {

            int intMonth = Convert.ToInt32(ddlM.SelectedValue);
            int intYear = Convert.ToInt32(ddlY.SelectedValue);
            MarkSundays(intMonth, intYear, a);
                   }

    }

    public void MarkSundays(int Month, int Year,int a)
    {
        int Month1 = Month;
        int Year1 = Year;
        int a1 = a;
        Label l1 = new Label();
        l1.Text = "S";
        int intDaysThisMonth = DateTime.DaysInMonth(Year1, Month1);
        DateTime oBeginnngOfThisMonth = new DateTime(Year1, Month1, 1);

            for (int z = 0; z < intDaysThisMonth ; z++)
            {

                if (oBeginnngOfThisMonth.AddDays(z).DayOfWeek == DayOfWeek.Sunday)
                {
                    int x =z + 1;
                    string c = "chk" + a1 + x;
                    string l = "lbl" + a1 + x;
                    CheckBox chktemp = (CheckBox)tbltemp.FindControl(c);
                      chktemp.Visible = false;
                    //chktemp.Enabled = false;
                   // chktemp.Text = "S";


                }

            }


    }
 }