C# DataGrid Rows Double Click Open Next Page

 private void srchdgview_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            try
            {
                string constring = "Data Source=ASHOK-PC\\SQLEXPRESS;Initial Catalog=hotel_db;Integrated Security=True";
                SqlConnection con = new SqlConnection(constring);
                string cmdstring = "select Registration_Id,Name,Address,City,Mobile_no,email,Passport,reference,birth_date,arrival_date,checkout_date,booking_datetime,room_category,room_terrife,room_no,ad_payment,payment_date,remarks,recipt_no,reminder from booking where Registration_Id = '" + (srchdgview.CurrentRow.Cells[0].Value.ToString()) + " ' ";
                SqlCommand cmd = new SqlCommand(cmdstring, con);
                SqlDataReader dr;
                con.Open();
                dr = cmd.ExecuteReader();

                while (dr.Read())
                {


                   


                    Booking bk = new Booking();
                    bk.Show();

                    bk.datetimedob.Format = DateTimePickerFormat.Custom;
                    bk.txtreg.Text = Convert.ToString(dr["Registration_Id"]);
                    bk.txtname.Text = Convert.ToString(dr["Name"]);
                    bk.txtcity.Text = dr["City"].ToString();
                    bk.txtadd.Text = dr["Address"].ToString();
                    bk.txtmobile.Text = dr["Mobile_no"].ToString();
                    bk.txtemail.Text = dr["email"].ToString();
                    bk.txtpassport.Text = dr["Passport"].ToString();
                    bk.txtbirth.Text = dr["birth_date"].ToString();
                    bk.arrivaldatetime.Text = dr["arrival_date"].ToString();
                    if (dr["Category"].ToString() == "Gen")
                       frm.radbtngen.Checked = true;
                   else
                       frm.radbtnobc.Checked = true;
                    frm .button1 .Text ="Update"; 

                    bk.paymentdatetime.Text = dr["payment_date"].ToString();
                    bk.savebutton.Text = "Update";
                    bk.deletebutton.Enabled = true;
                    bk.txtname.Enabled = false;
                    if (srchdgview.RowsDefaultCellStyle.BackColor == Color.Red)
                    {
                        bk.BackColor = Color.Red;
                    }
                }
               

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void srchreg_TextChanged(object sender, EventArgs e)
        {
            validation valids = new validation();
            valids.numwithdecitxtBox_TxtChng(srchreg, sender, e);
        }

---------------------------------------------------------
Cell Formet
 private void srchdgview_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {

          
           for (int i = 0; i <= srchdgview.Rows.Count - 1; i++)
           {
               DataGridViewRow dvr = srchdgview.Rows[e.RowIndex];
               string strStatus = dvr.Cells["STATUS"].Value.ToString();
               DateTime dt1 = new DateTime();
               dt1 =Convert.ToDateTime( dvr.Cells["ARRIVAL DATE"].Value.ToString());
               DateTime dt3 = new DateTime();
               dt3 = Convert.ToDateTime(DateTime.Now.ToShortDateString());
              
               if (strStatus == " Checked " || strStatus == "Checked " || strStatus == " Checked" || strStatus == "Checked")
               {
                   dvr.DefaultCellStyle.BackColor = Color.Red;
               }
               else if ((strStatus == " Unchecked " || strStatus == "Unchecked ") && dt1 > dt3)
               {

                   dvr.DefaultCellStyle.BackColor = Color.Orange;


               }
               else
               {
                   dvr.DefaultCellStyle.BackColor = Color.Green;
               }

            }
                  }
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Page Ref.
frm = new Form1();
            frm.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form3_Load);
            frm.Show();


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C#  Save, Update ,Deleted

  public partial class Item_Master : Form
    {
        Dbclass db = new Dbclass();
        string common;
        public Item_Master()
        {
            InitializeComponent();
        }

        private void btnrecord_Click(object sender, EventArgs e)
        {
            RecordItemMaster rtm = new RecordItemMaster();
            rtm.Show();
        }

        private void btnfind_Click(object sender, EventArgs e)
        {
         
        }

        private void btnsave_Click(object sender, EventArgs e)
        {
            if (txtitem_name.Text == "")
            {
                MessageBox.Show("Error 9001303991 : Fill Up The Item Name", "Blank.............", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1);
                return;
            }
            if (btnsave.Text == "Save")
            {
                string str = "Itemmaster_sp'S','','" +cmbf_category.SelectedValue  + "','" + txtitem_name.Text + "','" + txtitem_rs.Text + "','" +cmbunit_type.SelectedValue  + "'";
                db.inserfun(str);
                MessageBox.Show("Successfully Saved", "Save", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
                cmbf_category.Text = "";
                txtitem_name.Text = "";
                txtitem_rs.Text = "";
                cmbunit_type.Text = "";
                cmbf_category.Focus();
            }

            else if (btnsave.Text == "Update")
            {
                string upt = "ItemMaster_sp'U','" +txtunq_id.ToString () + "','" + cmbf_category.Text  + "','" + txtitem_name.Text + "','" + txtitem_rs.Text + "','" + cmbunit_type.Text + "'";
                db.Updatefun(upt);
                MessageBox.Show("Successfully Update ", "Update", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
                btnfind.Text = "Find";
                btnsave.Text = "Save";
                cmbf_category.Text = "";
                txtitem_name.Text = "";
                txtitem_rs.Text = "";
                cmbunit_type.Text = "";
                cmbf_category.Focus();
            }
        }

        private void Item_Master_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.F5)
            {
                btnsave_Click(sender, e);
            }
            else if (e.KeyCode == Keys.F2)
            {
                btnfind_Click(sender, e);
            }
            else if (e.KeyCode == Keys.F10)
            {
                btnrecord_Click(sender, e);
            }
        }

        private void Item_Master_Load(object sender, EventArgs e)
        {
            string str = "Select * from category_master";
            string str1 = "select * from unit";
            db.Fillcombo(cmbf_category, "category_name", "unq_id", str);
            db.Fillcombo(cmbunit_type, "unitname", "unqid", str1);

            DataTable dtt = new DataTable();
            string grd = "select unq_id, category_name[CATEGORY NAME],item_name [ITEM NAME],item_rs[ITEM RS],unit_type[UNIT TYPE] from item_master";
            dtt = db.FindFun(grd);
            Grditem_name.DataSource = dtt;
            //cmbf_category.Text = ComboBox.v
            //txtitem_name.Text = ComboBox;
            //txtitem_rs.Text = textBox1;
            //cmbunit_type.Text = textBox1;
        }
        int GridEvent;
      
        private void FillTextBox()
        {
            if (GridEvent < 0)
            {
                return;
            }
            else if (GridEvent > Grditem_name.Rows.Count - 1)
            {
                return;
            }
            else
            {
        
                txtunq_id.Text = Grditem_name.Rows[GridEvent].Cells[0].Value.ToString();
                cmbf_category.Text = Grditem_name.Rows[GridEvent].Cells[1].Value.ToString();
                txtitem_name.Text = Grditem_name.Rows[GridEvent].Cells[2].Value.ToString();
                txtitem_rs.Text = Grditem_name.Rows[GridEvent].Cells[3].Value.ToString();
                cmbunit_type.Text = Grditem_name.Rows[GridEvent].Cells[4].Value.ToString();
                cmbf_category.Focus();
                btnfind.Text = "Delete";
                btnsave.Text = "Update";
            }
        }

       

      
    

        private void btnfind_Click_1(object sender, EventArgs e)
        {
            if (txtitem_name.Text == "")
            {
                MessageBox.Show("Error 9001303991 :Fill Up The Item Name", "Blank.............", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1);
                return;
            }
            if (btnfind.Text == "Find")
            {
                tabControl1.SelectedTab = tabPage2;
            }
            else if (btnfind.Text == "Delete")
            {
                string del = "ItemMaster_sp 'D','" + txtunq_id.Text.ToString() + "'";
                db.Deletefun(del);
                MessageBox.Show("Successfull Delete", "Delete............", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
                cmbf_category.Text = "";
                txtitem_name.Text = "";
                txtitem_rs.Text = "";
                cmbunit_type.Text = "";
                cmbf_category.Focus();
                btnfind.Text = "Find";
                btnsave.Text = "Save";
            }
        }

       

        private void Grditem_name_CellDoubleClick_1(object sender, DataGridViewCellEventArgs e)
        {
            GridEvent = e.RowIndex;
            FillTextBox();
        }

        private void Grditem_name_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                FillTextBox();
            }
        }

        private void Grditem_name_CellEnter(object sender, DataGridViewCellEventArgs e)
        {
            GridEvent = e.RowIndex;
        }

        private void btnsave_Click_1(object sender, EventArgs e)
        {

        }

        private void Grditem_name_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }
    }
}