Syntax error in insert into statement.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.OleDb;

namespace SRL
{
    public partial class DAILY_REPORT : Form
    {
        OleDbConnection daily_rpt_con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Chirag\documents\visual studio 2012\Projects\SRL\SRL\SRL.accdb;Persist Security Info=True");
        public DAILY_REPORT()
        {
            InitializeComponent();
        }
        private void btn_submit_Click(object sender, EventArgs e)
        {
           

            OleDbDataAdapter da = new OleDbDataAdapter("SELECT * FROM daily where bill_no='" +txt_bill_no.Text+ "'", daily_rpt_con);
            DataTable dt = new DataTable();
            da.Fill(dt);

            
            try
            {
                OleDbCommand cmd1 = new OleDbCommand("select * from daily where bill_no='" + txt_bill_no.Text + "'", daily_rpt_con);
                OleDbDataReader dr1;
                daily_rpt_con.Open();
                dr1 = cmd1.ExecuteReader();


                if (dr1.Read())
                {
                    MessageBox.Show("Duplicate Entry");
                    dataGridView1.DataSource = dt;
                    dataGridView1.Visible = true;
                   
                }

                    //    else
                //    {
                //        string reg_date = dateTimePicker1.Value.ToString();
                //        string dob = dateTimePicker2.Value.ToString();
                //        OleDbCommand inst = new OleDbCommand();
                //        inst.CommandText = "insert into vehicle(registration_no,date_of_registration,chassis_no,pan_no,engine_no,date_of_birth,owner_name,owners_father,address,colony,city)values('" + textBox1.Text + "','" + reg_date + "','" + textBox2.Text + "','" + textBox9.Text + "','" + textBox3.Text + "','" + dob + "','" + textBox4.Text + "','" + textBox5.Text + "','" + textBox6.Text + "','" + textBox7.Text + "','" + textBox8.Text + "')";
                //                     //        OleDbDataAdapter DA1 = new OleDbDataAdapter("select registration_no,pan_no,owner_name,address,colony,city from vehicle where registration_no ='" + textBox1.Text + "'", insert);
                //        DataTable Table1 = new DataTable();
                //        DA1.Fill(Table1);
                //        dataGridView1.DataSource = Table1;
                //        dataGridView1.Visible = true;
                //    }

                else
                {
                    
                    string current_date = dtp_current_date.Value.ToString();
                    string date = dtp_date.Value.ToString();
                    OleDbCommand daily_rpt_cmd = new OleDbCommand();

                    //daily_rpt_cmd.CommandText = "insert into daily(bill_no,current_date,frm_daily,todaily,date,vechile_no,destination,sip_d_no,del_no,gr_no,qty,rate,amount)values('" + txt_bill_no.Text + "','" + current_date + "','" + txt_from.Text + "','" + txt_to.Text + "','" + date + "','" + txt_vehicle_no.Text + "','" + txt_destination.Text + "','" + txt_sip_no.Text + "','" + txt_del_no.Text + "','" + txt_g_r_no.Text + "','" + txt_quantity.Text + "','" + txt_rate.Text + "','" + txt_amount.Text + "')";
                    daily_rpt_cmd.CommandText = "insert into daily(bill_no,current_date,frm_daily,todaily,date,vechile_no,destination,sip_d_no,del_no,gr_no,qty,rate,amount)values(@bill_no,@current_date,@frm_daily,@todaily,@date,@vechile_no,@destination,@sip_d_no,@del_no,@gr_no,@qty,@rate,@amount)";
                    daily_rpt_cmd.Parameters.AddWithValue("@bill_no", txt_bill_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@current_date",current_date);
                    daily_rpt_cmd.Parameters.AddWithValue("@frm_daily",txt_from.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@todaily",txt_to.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@date",date);
                    daily_rpt_cmd.Parameters.AddWithValue("@vechile_no",txt_vehicle_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@destination",txt_destination.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@sip_d_no",txt_sip_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@del_no",txt_del_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@gr_no",txt_g_r_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@qty",txt_quantity.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@rate",txt_rate.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@amount",txt_amount.Text);

                    daily_rpt_cmd.Connection = daily_rpt_con;
                    daily_rpt_cmd.ExecuteNonQuery();
                    
                    MessageBox.Show("hello");
                    MessageBox.Show("Record Submitted Successfully!");


                    OleDbDataAdapter da1 = new OleDbDataAdapter("select * from daily where bill_no='" + txt_bill_no.Text + "'", daily_rpt_con);
                    DataTable dt1 = new DataTable();
                    da1.Fill(dt1);
                    dataGridView1.DataSource = dt1;
                    dataGridView1.Visible = true;
                }

            }
            catch
            {
            }
            daily_rpt_con.Close();

           
        }

       
    }
}

//daily_rpt_cmd.CommandText = "insert into daily(bill_no,current_date,frm_daily,todaily,date,vechile_no,destination,sip_d_no,del_no,gr_no,qty,rate,amount)values('" + txt_bill_no.Text + "','" + current_date + "','" + txt_from.Text + "','" + txt_to.Text + "','" + date + "','" + txt_vehicle_no.Text + "','" + txt_destination.Text + "','" + txt_sip_no.Text + "','" + txt_del_no.Text + "','" + txt_g_r_no.Text + "','" + txt_quantity.Text + "','" + txt_rate.Text + "','" + txt_amount.Text + "')";
                    daily_rpt_cmd.CommandText = "insert into daily(bill_no,current_date,frm_daily,todaily,date,vechile_no,destination,sip_d_no,del_no,gr_no,qty,rate,amount)values(@bill_no,@current_date,@frm_daily,@todaily,@date,@vechile_no,@destination,@sip_d_no,@del_no,@gr_no,@qty,@rate,@amount)";
                    daily_rpt_cmd.Parameters.AddWithValue("@bill_no", txt_bill_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@current_date",current_date);
                    daily_rpt_cmd.Parameters.AddWithValue("@frm_daily",txt_from.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@todaily",txt_to.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@date",date);
                    daily_rpt_cmd.Parameters.AddWithValue("@vechile_no",txt_vehicle_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@destination",txt_destination.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@sip_d_no",txt_sip_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@del_no",txt_del_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@gr_no",txt_g_r_no.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@qty",txt_quantity.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@rate",txt_rate.Text);
                    daily_rpt_cmd.Parameters.AddWithValue("@amount",txt_amount.Text);