Grid view (Pageing is not happening)

Hi,
    This i my assignment i tried my level best to complete the task but i failed.
The pageing is not happening in this gridview code.(It is not going to next page)
the source code is below please do help

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Text;
using System.IO;
using System.Data.SqlClient;
using System.Drawing;
public partial class MemberPanel_cRechargeDetails : System.Web.UI.Page

{
    int i, j;
    DateTime dtToday;
    string strDay;
    String C;
    string strMonth;
    string strYear;
    string strSqlDetails;
    string strSortExp;
    int intPageIndex;
    long lngRegNo, lngIntroRegNo;
    DataUtility objDUT = new DataUtility();
    Utility objUT = new Utility();
    protected void Page_Load(object sender, EventArgs e)
    {
        //-------------- Frefresh Page
        //HtmlMeta metaTag=new HtmlMeta();
       
       // metaTag.HttpEquiv = "Refresh";
        // metaTag.Content = "60";
         //Header.Controls.Add(metaTag);
        //-----------------------------------

        this.Page.Title = ConfigurationManager.AppSettings["titleBar"];
        if (!IsPostBack)
        {
            if (Request.QueryString.Count > 0)
            {
                if (Request.QueryString[0].ToString() == "success")
                {
                    lblMsg.Text = "Recharge coupon approved successfuly";
                    lblMsg.ForeColor = System.Drawing.Color.Green;
                }
                else if (Request.QueryString[0].ToString() == "error")
                {
                    lblMsg.Text = "There are some error please check details";
                }

            }
          
           this.ViewState["ps"] = "50";
           this.ViewState["_asc"] = " DESC";
           this.ViewState["By"] = " A.ACid";
            CurrentPage = 1;
            FillDDL();
            lngRegNo = Convert.ToInt64(Session["MaxReg"]);
            string strSQL = "select memcode,(fname+' '+isnull(lname,'')) as memname,loginid,regdate,introregno, mobile from member_master where regno=" + lngRegNo;
            DataTable dt = objDUT.GetDataTable(strSQL);
            lngRegNo = Convert.ToInt64(Session["MaxReg"].ToString());
            if (Request.QueryString.Count > 0)
            {
                C = Request.QueryString[0].ToString();
           
                BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
            }
            else
            {
                BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
            }

           
            //BindData("select A.*, M.LoginID, M.Mobile, SP.SpName From Member_Account A , Member_master M, Service_provider SP where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' and A.trSP = SP.Spid and a.transdate>(getdate()-3) order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
            //BindData("select A.* From Member_Account A where A.crdb='D' AND A.trStatus=1 and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
            //BindData("select A.*, M.LoginID, M.Mobile From Member_Account A , Member_master M where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
        }
    }
    protected void BindData(string q, string pSize, string cPage)
    {
        DataSet ds = objDUT.GetDataSet(q);
        this.ViewState["q"] = q;


        //-----------------------------------
        // Populate the repeater control with the Items DataSet
        PagedDataSource objPds = new PagedDataSource();
        objPds.DataSource = ds.Tables[0].DefaultView;


        // Indicate that the data should be paged
        objPds.AllowPaging = true;


        // Set the number of items you wish to display per page

        objPds.PageSize = Convert.ToInt32(pSize);



        dropPcount.Items.Clear();
        for (int b = 1; b <= objPds.PageCount; b++)
        {
            ListItem li = new ListItem(b.ToString(), b.ToString());
            dropPcount.Items.Add(li);
        }
        dropPcount.Items.Insert(0, "Page");
        dropPcount.SelectedIndex = CurrentPage;
        //-------CurrentPage

        lblCount.Text = dropPcount.SelectedValue + " of " + objPds.PageCount.ToString();



        // Set the PagedDataSource's current page
        objPds.CurrentPageIndex = Convert.ToInt32(dropPcount.SelectedValue) - 1;


        //------Enable ------------


        imgFirst.Enabled = !objPds.IsFirstPage;
        imgPre.Enabled = !objPds.IsFirstPage;
        imgLast.Enabled = !objPds.IsLastPage;
        imgNext.Enabled = !objPds.IsLastPage;

        //-----------------------
        if (ds.Tables[0].Rows.Count > 0)
        {
            TABLE2.Visible = true;
            //StateGrid.Visible = true;  sd
            StateGrid.DataSource = objPds;
            StateGrid.DataBind();
        }
        else
        {
            TABLE2.Visible = false;
            lblMsg.Text = "No Data found between selected date";
        }
    }
    protected string Getno()
    {
        ++i;
        return i.ToString();

    }
    protected string Getno1()
    {
        ++j;
        return j.ToString();

    }




    //bimdata end

    //protected string Getno()
    //{
    //    ++i;
    //    return i.ToString();

    //}
    //protected string Getno1()
    //{
    //    ++j;
    //    return j.ToString();

    //}
    protected void FillDDL()
    {
        try
        {
            for (int i = 2008; i <= Convert.ToInt32(System.DateTime.Today.Year); i++)
            {
                ddlFromYear.Items.Add(i.ToString());
                ddlToYear.Items.Add(i.ToString());
            }
            ddlFromYear.SelectedValue = DateTime.Now.Year.ToString();
            ddlToYear.SelectedValue = DateTime.Now.Year.ToString();

            for (int j = 1; j <= 12; j++)
            {
                ddlFromMonth.Items.Add(j.ToString());
                ddlToMonth.Items.Add(j.ToString());
            }
            ddlFromMonth.SelectedIndex = DateTime.Now.Month - 1;
            ddlToMonth.SelectedIndex = DateTime.Now.Month - 1;
            for (int k = 1; k <= 31; k++)
            {
                ddlFromDay.Items.Add(k.ToString());
                ddlToDay.Items.Add(k.ToString());
            }
            ddlToDay.SelectedIndex = DateTime.UtcNow.AddHours(5.30).Day - 1;
            ddlFromDay.SelectedIndex = DateTime.UtcNow.AddHours(5.30).Day - 1;
        }
        catch (Exception ex)
        {
            Response.Redirect("~/errorPage.aspx?error=" + ex.Message);
        }
    }
    protected void btnShow_Click(object sender, EventArgs e)
    {
        try
        {

            string strFromDate = ddlFromMonth.SelectedValue.ToString() + "/" + ddlFromDay.SelectedValue.ToString() + "/" + ddlFromYear.SelectedItem.Text;
            string strToDate = ddlToMonth.SelectedValue.ToString() + "/" + ddlToDay.SelectedValue.ToString() + "/" + ddlToYear.SelectedItem.Text;
            if (checkDate(strFromDate))
            {
                lblMsg.Text = "Invalid From Date";
                return;
            }
            else
            {
                lblMsg.Text = "";
            }
            if (checkDate(strToDate))
            {
                lblMsg.Text = "Invalid To Date";
                return;
            }
            else
            {
                lblMsg.Text = "";
            }
            if (Convert.ToDateTime(strFromDate) <= Convert.ToDateTime(strToDate))
            {
               // lblMsg.Text = strFromDate;
                BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
                //BindData("select A.*, M.LoginID, M.Mobile From Member_Account A , Member_master M where M.regno=A.regno and A.crdb='D' and A.transType='recharge' and (A.trDate between '" + strFromDate + "' and '" + Convert.ToDateTime(strToDate).AddDays(1) + "'  ) order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
            }
            else
            {

                ltrlJavascript.Text = "";
            }
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
        //    Response.Redirect("~/errorPage.aspx?error=" + ex.Message);
        }
    }
    private bool checkDate(string dDate)
    {
        bool flag = false;
        try
        {
            DateTime dcDate = Convert.ToDateTime(dDate);
            flag = false;
        }
        catch { flag = true; }
        return flag;

    }
   
    public int CurrentPage
    {
        get
        {
            // look for current page in ViewState
            object o = this.ViewState["_CurrentPage"];
            if (o == null)
                return 0; // default page index of 0
            else
                return (int)o;
        }

        set
        {
            this.ViewState["_CurrentPage"] = value;
        }
    }

   



    protected void dropPage_SelectedIndexChanged(object sender, EventArgs e)
    {

        this.ViewState["ps"] = dropPage.SelectedValue;
        CurrentPage = 1;
        //FillGrid();

    }
    protected void dropPcount_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (dropPcount.SelectedIndex != 0)
        {

            this.ViewState["ps"] = dropPage.SelectedValue;
            int c = int.Parse(dropPcount.SelectedValue);
            this.ViewState["_CurrentPage"] = c;


            int pagesize = int.Parse(this.ViewState["ps"].ToString());
            i = (c - 1) * pagesize;

            BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
            //BindData("select A.*, M.LoginID, M.Mobile, SP.SpName From Member_Account A , Member_master M, Service_provider SP where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' and A.trSP = SP.Spid and a.transdate>(getdate()-3) order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
           
            //BindData("select A.* From Member_Account A where A.crdb='D' AND A.trStatus=1 and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
            //Response.Write(i.ToString());
           // FillGrid();
        }
    }

    protected void imgFirst_Click(object sender, ImageClickEventArgs e)
    {
        this.ViewState["ps"] = dropPage.SelectedValue;

        this.ViewState["_CurrentPage"] = 1;

        CurrentPage = 1;
        int pagesize = int.Parse(this.ViewState["ps"].ToString());
        i = (CurrentPage - 1) * pagesize;
        BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
        //BindData("select A.*, M.LoginID, M.Mobile From Member_Account A , Member_master M where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
    }
    protected void imgLast_Click(object sender, ImageClickEventArgs e)
    {

        this.ViewState["ps"] = dropPage.SelectedValue;
        int c = dropPcount.Items.Count - 1;
        this.ViewState["_CurrentPage"] = c;

        //----------- Reset Serial Number
        CurrentPage = c;
        int pagesize = int.Parse(this.ViewState["ps"].ToString());
        i = (CurrentPage - 1) * pagesize;

        BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
        //BindData("select A.*, M.LoginID, M.Mobile From Member_Account A , Member_master M where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");

    }
    protected void imgPre_Click(object sender, ImageClickEventArgs e)
    {
        this.ViewState["ps"] = dropPage.SelectedValue;
        int c = Convert.ToInt32(this.ViewState["_CurrentPage"].ToString()) - 1;
        this.ViewState["_CurrentPage"] = c;

        //----------- Reset Serial Number
        CurrentPage = c;
        int pagesize = int.Parse(this.ViewState["ps"].ToString());
        i = (CurrentPage - 1) * pagesize;
        BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
        //BindData("select A.*, M.LoginID, M.Mobile From Member_Account A , Member_master M where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");

    }
    protected void imgNext_Click(object sender, ImageClickEventArgs e)
    {
        try
        {
            this.ViewState["ps"] = dropPage.SelectedValue;
            int c = Convert.ToInt32(this.ViewState["_CurrentPage"].ToString()) + 1;
            this.ViewState["_CurrentPage"] = c;

            //----------- Reset Serial Number
            CurrentPage = c;
            int pagesize = int.Parse(this.ViewState["ps"].ToString());
            i = (CurrentPage - 1) * pagesize;
            BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
          //  BindData("select A.*, M.LoginID, M.Mobile From Member_Account A , Member_master M where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
        }
        catch(Exception ex)
        {
            lblMsg.Text = ex.Message;
        }
    }
    protected void StateGrid_ItemCommand(object source, RepeaterCommandEventArgs e)
    {
      
        string trcode = e.CommandArgument.ToString();
        HiddenField1.Value = trcode;
        Session["tr"] = trcode;
        Label lblS = (Label)e.Item.FindControl("lblS");
        if (lblS.Text.ToLower() == "pending")
        {
            Response.Redirect("RCApprove.aspx");
        }
        else
        {
            Response.Redirect("RC.aspx");
        }
      
    }






    protected void StateGrid_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            Label lblS = (Label)e.Item.FindControl("lblS");
            Label lblA = (Label)e.Item.FindControl("lblA");
            if (lblA.Text != "")
            {
                lblA.Text = string.Format("{0:dd-MM-yyyy}", Convert.ToDateTime(lblA.Text));
            }
            if (lblS.Text == "0")
            {
              lblS.Text = "Pending";
              lblS.ForeColor = Color.Blue ;
            }
           else if (lblS.Text == "2")
            {
               lblS.Text = "Rejected";
                lblS.ForeColor = Color.Red;
            }
            else if (lblS.Text == "1")
            {
                lblS.Text = "Approved";
                lblS.ForeColor = Color.Green;
            }
        }

    }
    protected void ddlSort_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (ddlSort.SelectedValue.ToLower() == "trdate")
        {
            this.ViewState["By"] = " A.trDate";
        }
        else if (ddlSort.SelectedValue.ToLower() == "tramount")
        {
            this.ViewState["By"] = " A.trAmount";
        }
        else if (ddlSort.SelectedValue.ToLower() == "trStatus")
        {
          this.ViewState["By"] = " A.trStatus";
        }
        else if (ddlSort.SelectedValue.ToLower() == "loginid")
        {
            this.ViewState["By"] = " M.Loginid";
        }
        BindData("select A.* From Member_Account A where A.crdb='D' and A.transType='recharge' and regno=" + lngRegNo + " order by A.ACID " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
        //BindData("select A.*, M.LoginID, M.Mobile From Member_Account A , Member_master M where M.regno=A.regno AND A.crdb='D' and A.transType='recharge' order by " + this.ViewState["By"].ToString() + " " + this.ViewState["_asc"].ToString() + "", this.ViewState["ps"].ToString(), "1");
    }
}


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Advance thanks for the help