problem in changing view of multiview

<asp:GridView ID="griddistrict" Width="95%" runat="server" AutoGenerateColumns="False"
    AlternatingRowStyle-BackColor="#CCE6FF" GridLines="both" CellPadding="5" CellSpacing="1"
    RowStyle-HorizontalAlign="Center" ShowHeader="true" DataKeyNames="nid" ShowFooter="true"
    OnRowCommand="griddistrict_RowCommand" OnSelectedIndexChanged="griddistrict_SelectedIndexChanged"
    OnRowDeleting="griddistrict_RowDeleting1" AllowPaging="True" PageSize="10"
    OnPageIndexChanging="griddistrict_PageIndexChanging"
    onrowediting="griddistrict_RowEditing">
    <Columns>
        <asp:TemplateField HeaderText="Select" Visible="false">
            <ItemTemplate>
                <asp:Label ID="lblnid" Text='<%#  bind("nid")%>' runat="server"></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Select">
            <HeaderTemplate>
                <asp:CheckBox ID="chkSelectAll" runat="server" AutoPostBack="true" OnCheckedChanged="chkSelectAll_CheckedChanged" />
            </HeaderTemplate>
            <ItemTemplate>
                <asp:CheckBox ID="chkSelect" runat="server"></asp:CheckBox>
            </ItemTemplate>
            <FooterTemplate>
                <asp:LinkButton ID="lnkdelete" runat="server" OnClick="lnkselect_Click" OnClientClick="return confirm('Are you sure! You want to Delete Selected?')"> Delete
                </asp:LinkButton>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="SNo.">
            <ItemTemplate>
                <%#Container.DataItemIndex+1 %>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="CSC Name">
            <ItemTemplate>
                <asp:Label ID="lblcscname" runat="server" Text='<%# Eval("cscname") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="CSC Code">
            <ItemTemplate>
                <asp:Label ID="lblcsccode" runat="server" Text='<%# Eval("csccode") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="CSC Address">
            <ItemTemplate>
                <asp:Label ID="lblcscaddress" runat="server" Text='<%# Eval("address") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Contact Details">
            <ItemTemplate>
                <asp:Label ID="lblcontact" runat="server" Text='<%# Eval("primarycontactno")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Approval Status">
            <ItemTemplate>
                <asp:Label runat="server" ID="lnkapprove" Text=' <%# Bind("approvalstatus") %>' />
            </ItemTemplate>
            <FooterTemplate>
                <asp:LinkButton ID="lnkchangestatus" runat="server" OnClientClick="return confirm('Are you sure! You want to Approve Or Not?')"
                    OnClick="lnkchangestatus_Click"> Approval Status
                </asp:LinkButton>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Enable Status">
            <ItemTemplate>
                <asp:Label runat="server" ID="lblenable" Text=' <%# Bind("enablestatus") %>' />
            </ItemTemplate>
            <FooterTemplate>
                <asp:LinkButton ID="lnkenable" runat="server" OnClientClick="return confirm('Are you sure! You want to Change Status?')"
                    OnClick="lnkenable_Click">  Enable/Disable
                </asp:LinkButton>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Creation Date" Visible="false">
            <ItemTemplate>
                <asp:Label runat="server" ID="createddate" Text=' <%# Bind("creationdate", "{0:dd MMM,yy}") %>' />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField ShowHeader="false">
            <ItemTemplate>
                <asp:Button runat="server" ID="btnview" Text="View" OnClientClick="return confirm('Are you sure! You want to View Record?')"
                    CommandName="viewrecord" CommandArgument='<%#bind("nid") %>' CssClass="btnstyle" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Action">
            <ItemTemplate>
                <asp:Button runat="server" ID="btnedit" Text="Edit" OnClientClick="return confirm('Are you sure! You want to Edit?')"
                    CommandName="Editrow" CommandArgument='<%#bind("nid") %>' CssClass="btnstyle" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField ShowHeader="false">
            <ItemTemplate>
                <asp:Button runat="server" ID="Delete" Text="Delete" OnClientClick="return confirm('Are you sure! You want to Delete?')"
                    CommandName="Delete" CssClass="btnstyle" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
    <EmptyDataRowStyle BackColor="#888543" ForeColor="White" HorizontalAlign="Center" />
    <HeaderStyle BackColor="#0972A2" ForeColor="#FAFCFC" />
    <RowStyle Font-Size="8pt" Font-Names="Verdana" HorizontalAlign="Center" />
    <FooterStyle HorizontalAlign="Center" />
</asp:GridView>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class manage_cscinformation : System.Web.UI.Page
{
    DataAccess objda = new DataAccess();
    DataSet ds = new DataSet();
    DataSet ds1 = new DataSet();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            griddistrict.Visible = true;
            bindgroupcompany();
            bindstate();
            bindgrid();
            views.ActiveViewIndex = 2;
            ListItem item = new ListItem("--Select--", "select");
            ddldistrict.Items.Insert(0, item);
            ddldistrict.Enabled = false;
            if (Request.QueryString["branch"] == null)
            {
                Response.Redirect("branchhome.aspx");
            }
            else if (Request.QueryString["branch"].ToString() == "Add")
            {
                views.ActiveViewIndex = 0;

            }
            else
            {
                views.ActiveViewIndex = 2;
            }

        }

    }

    public void bindgroupcompany()
    {

        ds = objda.getallgroupcompany();

        if (ds.Tables[0].Rows.Count > 0)
        {
            ddlinsure.DataSource = ds;
            ddlinsure.DataValueField = "groupcompanyname";
            ddlinsure.DataTextField = "groupcompanyname";
            ddlinsure.DataBind();
            ListItem item = new ListItem("-Select Group Company-", "select");
            ddlinsure.Items.Insert(0, item);
            ddlgcompany.DataSource = ds;
            ddlgcompany.DataValueField = "groupcompanyname";
            ddlgcompany.DataTextField = "groupcompanyname";
            ddlgcompany.DataBind();
            ListItem item1 = new ListItem("-Select Group Company-", "select");
            ddlgcompany.Items.Insert(0, item1);

        }
    }

    public void bindstate()
    {
        objda.status = "";
        ds = objda.getallstate();
        if (ds.Tables[0].Rows.Count > 0)
        {
            ddlstate.DataSource = ds;
            ddlstate.DataValueField = "nid";
            ddlstate.DataTextField = "statename";
            ddlstate.DataBind();
            ddlstate.SelectedIndex = 0;
        }
    }

    public void binddistrict()
    {

        ddldistrict.Enabled = true;
        objda.Stateid = Convert.ToInt32(ddlstate.SelectedValue.ToString());
        objda.status = "enabled";
        ds1 = objda.getenableddist();
        if (ds1.Tables[0].Rows.Count > 0)
        {
            ddldistrict.DataSource = ds1;
            ddldistrict.DataValueField = "nid";
            ddldistrict.DataTextField = "distname";
            ddldistrict.DataBind();
            ddldistrict.SelectedIndex = 0;
        }
    }



    public void bindgrid()
    {
        objda.status = "All";
        ds = objda.getcscdetail();
        if (ds.Tables[0].Rows.Count > 0)
        {
            griddistrict.Visible = true;
            griddistrict.DataSource = ds;
            griddistrict.DataBind();
            divgrid.InnerText = "";
        }
        else
        {
            griddistrict.Visible = false;
            divgrid.InnerText = "Record Not Found";
        }
    }

    protected void griddistrict_RowCommand(object sender, GridViewCommandEventArgs e)
    {

        if (e.CommandName == "InsertNew")
        {
            griddistrict.Visible = false;
            blank();
            views.ActiveViewIndex = 0;
        }
        else if (e.CommandName == "Editrow")
        {
            int nid = Convert.ToInt32(e.CommandArgument.ToString());
            filldata(nid);
            try
            {
                string strHostName = System.Net.Dns.GetHostName();
                string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

                objda.Ipaddress = clientIPAddress;
                objda.loginid = Session["username"].ToString();
                objda.description = "Upadte The Record Of nid  " + nid + "  of CSC Information Table";
                objda.insertlog();
            }
            catch
            {
            }
            views.ActiveViewIndex = 0;
        }
        else if (e.CommandName == "viewrecord")
        {
            int nid = Convert.ToInt32(e.CommandArgument.ToString());
            viewdata(nid);

            try
            {
                string strHostName = System.Net.Dns.GetHostName();
                string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

                objda.Ipaddress = clientIPAddress;
                objda.loginid = Session["username"].ToString();
                objda.description = "View The Record Of Nid  " + nid + " of CSC Information Table";
                objda.insertlog();
            }
            catch
            {
            }
            views.ActiveViewIndex = 1;
        }
        else if (e.CommandName == "Delete")
        {

        }
    }

    public void viewdata(int nid)
    {
        objda.nid = nid;
        ds = objda.getcscdetailbynid();
        if (ds.Tables[0].Rows.Count > 0)
        {

            lblcscname.Text = ds.Tables[0].Rows[0]["cscname"].ToString();
            lblemail.Text = ds.Tables[0].Rows[0]["email"].ToString();
            lblcountry.Text = ds.Tables[0].Rows[0]["country"].ToString();
            lbladdress.Text = ds.Tables[0].Rows[0]["address"].ToString();
            lblstate.Text = ds.Tables[0].Rows[0]["state"].ToString();
            lbldistrict.Text = ds.Tables[0].Rows[0]["district"].ToString();
            lblzipcode.Text = ds.Tables[0].Rows[0]["zipcode"].ToString();
            lblfaxno.Text = ds.Tables[0].Rows[0]["faxno"].ToString();
            lblfno.Text = ds.Tables[0].Rows[0]["primarycontactno"].ToString();
            lblsno.Text = ds.Tables[0].Rows[0]["secondrycontact"].ToString();
            lblremark.Text = ds.Tables[0].Rows[0]["remark"].ToString();


        }
    }
    public void filldata(int nid)
    {
        objda.nid = nid;
        ds = objda.getcscdetailbynid();
        if (ds.Tables[0].Rows.Count > 0)
        {
            ddlinsure.SelectedItem.Text = ds.Tables[0].Rows[0]["companyname"].ToString();
            txtcscname.Value = ds.Tables[0].Rows[0]["cscname"].ToString();
            txtemailid.Value = ds.Tables[0].Rows[0]["email"].ToString();
            txtcountry.Value = ds.Tables[0].Rows[0]["country"].ToString();
            txtaddess.Value = ds.Tables[0].Rows[0]["address"].ToString();
            ddlstate.SelectedItem.Text = ds.Tables[0].Rows[0]["state"].ToString();
            binddistrict();
            ddldistrict.SelectedItem.Text = ds.Tables[0].Rows[0]["district"].ToString();
            txtzip.Value = ds.Tables[0].Rows[0]["zipcode"].ToString();
            txtfaxno.Value = ds.Tables[0].Rows[0]["faxno"].ToString();
            txtfno.Value = ds.Tables[0].Rows[0]["primarycontactno"].ToString();
            txtsno.Value = ds.Tables[0].Rows[0]["secondrycontact"].ToString();
            txtremark.Text = ds.Tables[0].Rows[0]["remark"].ToString();
            ViewState["edit"] = nid;

        }
    }
    protected void griddistrict_SelectedIndexChanged(object sender, EventArgs e)
    {

    }




    protected void griddistrict_RowDeleting1(object sender, GridViewDeleteEventArgs e)
    {
        objda.nid = Convert.ToInt32(griddistrict.DataKeys[e.RowIndex].Value.ToString());

        objda.deletecscdetail();
        try
        {
            string strHostName = System.Net.Dns.GetHostName();
            string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

            objda.Ipaddress = clientIPAddress;
            objda.loginid = Session["username"].ToString();
            objda.description = "Delete The Record Of Nid  " + Convert.ToInt32(griddistrict.DataKeys[e.RowIndex].Value.ToString()) + " of CSC Information Table";
            objda.insertlog();
        }
        catch
        {
        }
        bindgrid();


    }
    protected void griddistrict_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        griddistrict.PageIndex = e.NewPageIndex;
        bindgrid();



    }
    protected void chkSelectAll_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chkAll = (CheckBox)griddistrict.HeaderRow.FindControl("chkSelectAll");
        if (chkAll.Checked == true)
        {
            foreach (GridViewRow gvRow in griddistrict.Rows)
            {
                CheckBox chkSel = (CheckBox)gvRow.FindControl("chkSelect");
                chkSel.Checked = true;

            }
        }
        else
        {
            foreach (GridViewRow gvRow in griddistrict.Rows)
            {
                CheckBox chkSel = (CheckBox)gvRow.FindControl("chkSelect");
                chkSel.Checked = false;

            }
        }

    }


    protected void lnkselect_Click(object sender, EventArgs e)
    {
        int flag = 0;

        foreach (GridViewRow gvRow in griddistrict.Rows)
        {
            CheckBox chkSel = (CheckBox)gvRow.FindControl("chkSelect");
            if (chkSel.Checked == true)
            {
                flag = flag + 1;
                objda.nid = Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value);
                objda.deletecscdetail();
                try
                {
                    string strHostName = System.Net.Dns.GetHostName();
                    string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

                    objda.Ipaddress = clientIPAddress;
                    objda.loginid = Session["username"].ToString();
                    objda.description = "Delete The Record Of Nid  " + Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value) + " of CSC Information Table";
                    objda.insertlog();
                }
                catch
                {
                }
            }


        }
        if (flag == 0)
        {
            string msg = @"<script language='javascript' type='text/javascript'>alert('Please Select row !')</script>";
            Page.RegisterStartupScript("msg", msg);
            return;
        }
        bindgrid();


    }

    protected void lnkchangestatus_Click(object sender, EventArgs e)
    {
        int flag = 0;
        foreach (GridViewRow gvRow in griddistrict.Rows)
        {
            CheckBox chkSel = (CheckBox)gvRow.FindControl("chkSelect");
            if (chkSel.Checked == true)
            {
                flag = flag + 1;
                objda.nid = Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value);
                objda.Approvalby = Session["username"].ToString();
                objda.Approvalstatus = ((Label)(griddistrict.Rows[gvRow.RowIndex].FindControl("lnkapprove"))).Text;
                objda.cscchangeapproval();
                try
                {
                    string strHostName = System.Net.Dns.GetHostName();
                    string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

                    objda.Ipaddress = clientIPAddress;
                    objda.loginid = Session["username"].ToString();
                    if (((Label)(griddistrict.Rows[gvRow.RowIndex].FindControl("lnkapprove"))).Text == "approved")
                    {
                        objda.description = "Change Approval from approved to  pending Of Nid  " + Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value) + " of CSC Information Table";
                    }
                    else
                    {
                        objda.description = "Change Approval from pending to  approved Of Nid   " + Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value) + " of CSC Information Table";
                    }
                    objda.insertlog();
                }
                catch
                {
                }

            }

        }
        if (flag == 0)
        {
            string msg = @"<script language='javascript' type='text/javascript'>alert('Please Select row !')</script>";
            Page.RegisterStartupScript("msg", msg);
            return;
        }

        bindgrid();
    }
    protected void lnkenable_Click(object sender, EventArgs e)
    {
        int flag = 0;
        foreach (GridViewRow gvRow in griddistrict.Rows)
        {
            CheckBox chkSel = (CheckBox)gvRow.FindControl("chkSelect");
            if (chkSel.Checked == true)
            {
                flag = flag + 1;
                objda.nid = Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value);
                objda.Enableby = Session["username"].ToString();
                objda.status = ((Label)(griddistrict.Rows[gvRow.RowIndex].FindControl("lblenable"))).Text;
                objda.Enablecscstatus();
                try
                {
                    string strHostName = System.Net.Dns.GetHostName();
                    string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();
                    objda.Ipaddress = clientIPAddress;
                    objda.loginid = Session["username"].ToString();
                    if (((Label)(griddistrict.Rows[gvRow.RowIndex].FindControl("lnkapprove"))).Text == "enabled")
                    {
                        objda.description = "Change Approval from enabled to  disabled Of Nid  " + Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value) + " of CSC Information Table";
                    }
                    else
                    {
                        objda.description = "Change Approval from disabled to  enabled Of Nid   " + Convert.ToInt32(griddistrict.DataKeys[gvRow.RowIndex].Value) + " of CSC Information Table";
                    }
                    objda.insertlog();
                }
                catch
                {
                }
            }


        }
        if (flag == 0)
        {
            string msg = @"<script language='javascript' type='text/javascript'>alert('Please Select row !')</script>";
            Page.RegisterStartupScript("msg", msg);
            return;
        }
        bindgrid();


    }
    protected void btnsubmit_Click(object sender, EventArgs e)
    {
        objda.Cscname = txtcscname.Value;
        objda.name = txtcscname.Value;
        objda.type = "csc";
        ds = objda.getdatabyname();
        objda.emailid = txtemailid.Value;
        objda.country = txtcountry.Value;
        objda.address = txtaddess.Value;
        objda.name = ddlinsure.SelectedValue.ToString();
        objda.state = ddlstate.SelectedItem.ToString();
        objda.district = ddldistrict.SelectedItem.ToString();
        objda.zip = txtzip.Value;
        objda.fax = txtfaxno.Value;
        objda.mobile = txtfno.Value;
        objda.mobileno = txtsno.Value;
        objda.Remark = txtremark.Text;
        objda.Createdby = Session["username"].ToString();
        if (ViewState["edit"] != null)
        {
            objda.nid = Convert.ToInt32(ViewState["edit"].ToString());
            objda.updatecscdetail();
            try
            {
                string strHostName = System.Net.Dns.GetHostName();
                string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

                objda.Ipaddress = clientIPAddress;
                objda.loginid = Session["username"].ToString();
                objda.description = "Upadte The Record Of nid  " + Convert.ToInt32(ViewState["edit"].ToString()) + "  of CSC Information Table";
                objda.insertlog();
            }
            catch
            {
            }
            string msg = @"<script language='javascript' type='text/javascript'>alert('Record is Updated !')</script>";
            Page.RegisterStartupScript("msg", msg);
            bindgrid();
            views.ActiveViewIndex = 2;

        }
        else
        {
            objda.insertcscdetails();
            try
            {
                string strHostName = System.Net.Dns.GetHostName();
                string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

                objda.Ipaddress = clientIPAddress;
                objda.loginid = Session["username"].ToString();
                objda.description = "Insert The Record into CSC Information Table";
                objda.insertlog();
            }
            catch
            {
            }
            blank();
            string msg = @"<script language='javascript' type='text/javascript'>alert('Record is Inserted !')</script>";
            Page.RegisterStartupScript("msg", msg);
            views.ActiveViewIndex = 0;
            griddistrict.Visible = true;
        }
        bindgrid();

    }
    protected void ddlstate_SelectedIndexChanged(object sender, EventArgs e)
    {
        binddistrict();
    }

    public void blank()
    {

        txtcscname.Value = "";
        txtemailid.Value = "";
        txtcountry.Value = "";
        txtaddess.Value = "";
        ddlstate.SelectedIndex = -1;
        ddldistrict.Enabled = false;
        txtzip.Value = "";
        txtfaxno.Value = "";
        txtfno.Value = "";
        txtsno.Value = "";
        txtremark.Text = "";
    }
    protected void btnback_Click(object sender, EventArgs e)
    {
        views.SetActiveView(view3);
        griddistrict.Visible = true;

    }
    protected void ddlgcompany_SelectedIndexChanged(object sender, EventArgs e)
    {
        objda.company = ddlgcompany.SelectedItem.Text;
        ds = objda.getcsccodebycompany();
        if (ds.Tables[0].Rows.Count > 0)
        {
            griddistrict.Visible = true;
            griddistrict.DataSource = ds.Tables[0];
            griddistrict.DataBind();
            divgrid.InnerText = "";
        }
        else
        {
            griddistrict.Visible = false;
            divgrid.InnerText = "Record not Found";
            views.ActiveViewIndex = 2;
        }
    }
    protected void btnsearch_Click(object sender, EventArgs e)
    {
        objda.company = ddlgcompany.SelectedItem.Text;
        objda.branch = txtbranch.Value;
        ds = objda.getcsccodebycompanyandbranch();
        if (ds.Tables[0].Rows.Count > 0)
        {
            griddistrict.Visible = true;
            griddistrict.DataSource = ds.Tables[0];
            griddistrict.DataBind();
            divgrid.InnerText = "";
        }
        else
        {
            griddistrict.Visible = false;
            divgrid.InnerText = "Record not Found";
            views.ActiveViewIndex = 2;
        }
    }
    protected void griddistrict_RowEditing(object sender, GridViewEditEventArgs e)
    {

    }
    protected void btnCancel_Click(object sender, EventArgs e)
    {
        views.SetActiveView(view3);
        griddistrict.Visible = true;
    }
}