Update and Insert Data from Excel File to SQL when.........

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Data.SqlClient;


namespace Testinsertdata
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string excelFilePath;
            if (txtopen.Text.Length > 0)
            {
                try
                {
                    excelFilePath = txtopen.Text;
                    string sExcelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + excelFilePath + ";Extended Properties=" + "\"Excel 8.0;HDR=YES;\"";
                    string sSqlConnectionString = "SERVER=.;USER ID=sa;PASSWORD=;DATABASE=EQMT_Database;CONNECTION RESET=FALSE";

                    //  Excel
                    OleDbConnection OleDbConn = new OleDbConnection(sExcelConnectionString);
                    OleDbConn.Open();
                    OleDbDataAdapter OA = new OleDbDataAdapter("SELECT * FROM [Tbl_EQMT$]", OleDbConn);
                    //OleDbCommand OM = new OleDbCommand();
                    DataSet Ods = new DataSet();
                    DataTable Odt = new DataTable();
                    OA.Fill(Odt);
                    DataRow Orow;
                    
                    //  SQL
                    SqlConnection SqlConn = new SqlConnection(sSqlConnectionString);
                    SqlConn.Open();
                    SqlDataAdapter Sda = new SqlDataAdapter("Select * from Tbl_EQMT", SqlConn);
                    DataTable Sdt = new DataTable();
                    SqlCommand Scm = new SqlCommand();
                    Scm.Connection = SqlConn;
                    Scm.CommandType = CommandType.Text ;
                    Sda.Fill(Sdt);
                    int Snum = Sdt.Rows.Count;
                    DataRow Srow;
               
               
                    for (int i = 0; i <= Odt.Rows.Count-1; i++)
                    {
                        for (int j = 0; j <= Odt.Columns.Count-1; j++)
                        {
                            Scm.CommandText = "Insert  into Tbl_EQMT (" + Sdt.Columns[j].ColumnName.Trim() + ") values ( '" + Odt.Rows[i].ItemArray.GetValue(j) + "')";
                            Scm.ExecuteNonQuery();
                            
                        }                                                
                    }
                    MessageBox.Show("Success full");
                }
                     
                catch(Exception ex)
                {
                    MessageBox.Show(ex.Message.ToString());
                }
            }
            else{MessageBox.Show("You not Select Excel File Excel","Error",MessageBoxButtons.OK,MessageBoxIcon.Error);}
         }
    

        private void btopen_Click(object sender, EventArgs e)
        {
            this.Cursor = System.Windows.Forms.Cursors.WaitCursor;
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.Filter = "Excel files|*.xls|Excel files (*.xls)|*.xls";
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    if (dialog.FileName.Length > 0)
                    {
                        txtopen.Text = dialog.FileName;
                    }
                }
                catch
                {
                    MessageBox.Show("File Error", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            this.Cursor = System.Windows.Forms.Cursors.Default;
        }

    }


}