Object reference not set to an instance of an object.

[rachna gandhi]

my que is i have used this code for retriving data from grid view and insert it into database.now at the button event the values are not retrived from the gridview.it gives error Object reference not set to an instance of an object.wht is soln?

public partial class frmshowcustapp : System.Web.UI.Page
{
    public SqlCommand cmd;
    public string str;
    public SqlDataAdapter dtp;
    public DataSet ds;
    public SqlDataReader dr;
    public string id, birthday, c_name,phone_no, address, l_or_pno, emailid, city, pincode, occuption,photo,imagpath,dealer_list, sex, f_member;
    //"id","c_name","birthday","phone_no","address","l_or_pno","emailid","city","pincode""occuptiopn","sex","f_member");
  //  public partial class migrated_frmshowcustapp:frmshowcustapp
 
 
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        connection.getconn();
        //Panel1.Visible = false;
    }
    protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {
        //Panel1.Visible = true;
 
        id = GridView1.SelectedRow.Cells[1].Text;
 
        c_name = GridView1.SelectedRow.Cells[2].Text;
        birthday = GridView1.SelectedRow.Cells[3].Text;
        phone_no = GridView1.SelectedRow.Cells[4].Text;
        address = GridView1.SelectedRow.Cells[5].Text;
        photo = GridView1.SelectedRow.Cells[15].Text;
        imagpath = GridView1.SelectedRow.Cells[6].Text;
        l_or_pno = GridView1.SelectedRow.Cells[7].Text;
        emailid = GridView1.SelectedRow.Cells[8].Text;
        city = GridView1.SelectedRow.Cells[9].Text;
        pincode = GridView1.SelectedRow.Cells[10].Text;
        occuption = GridView1.SelectedRow.Cells[13].Text;
        sex = GridView1.SelectedRow.Cells[11].Text;
        f_member = GridView1.SelectedRow.Cells[12].Text;
        dealer_list = GridView1.SelectedRow.Cells[14].Text;
        txtemailid.Text = GridView1.SelectedRow.Cells[8].Text;
        txtcname.Text = GridView1.SelectedRow.Cells[2].Text;
 
        }
 
    protected void btnsavec_Click(object sender,EventArgs e)
    {
 
        id = GridView1.SelectedRow.Cells[1].Text;
 
        c_name = GridView1.SelectedRow.Cells[2].Text;
        birthday = GridView1.SelectedRow.Cells[3].Text;
        phone_no = GridView1.SelectedRow.Cells[4].Text;
        address = GridView1.SelectedRow.Cells[5].Text;
        photo = GridView1.SelectedRow.Cells[15].Text;
        imagpath = GridView1.SelectedRow.Cells[6].Text;
        l_or_pno = GridView1.SelectedRow.Cells[7].Text;
        emailid = GridView1.SelectedRow.Cells[8].Text;
        city = GridView1.SelectedRow.Cells[9].Text;
        pincode = GridView1.SelectedRow.Cells[10].Text;
        occuption = GridView1.SelectedRow.Cells[13].Text;
        sex = GridView1.SelectedRow.Cells[11].Text;
        f_member = GridView1.SelectedRow.Cells[12].Text;
        dealer_list = GridView1.SelectedRow.Cells[14].Text;
        txtemailid.Text = GridView1.SelectedRow.Cells[8].Text;
        txtcname.Text = GridView1.SelectedRow.Cells[2].Text;
 
 
       str="insert into customer_list values('" + id +"','"+ c_name +"','" + birthday +"','"+phone_no+"','"+address+"','"+photo+"','"+imagpath+"','"+l_or_pno+"','"+emailid+"','"+city+"','"+pincode+"','"+occuption+"','"+sex+"','"+f_member+"','"+dealer_list+"','"+txtid.Text+"')";
        cmd = new SqlCommand(str,connection.conn);
        cmd.ExecuteNonQuery();
        lblmsg.Text = "done";
 
    }

[Rabbit]

I don't see connection defined anywhere.

[fastestindian]

whenever u r accessing any object, make sure that object is not null. For this u always can check with conditional statement and write ur executing that code if object not null condition is true.