Records order is changing while import excel data to SQL table in C#

private void btnELChooseFile_Click(object sender, EventArgs e)
{
    DataSet ds = new DataSet();
    if (FileUpload1.ShowDialog() == DialogResult.OK)
    {
        string FileName = Path.GetFileName(FileUpload1.FileName);
        HFExcel.Text = FileName.Trim();
        string Extension = Path.GetExtension(FileUpload1.FileName);
        string FilePath = System.Windows.Forms.Application.StartupPath + "\\App_Data\\" + FileName;
        System.IO.File.Copy(FileUpload1.FileName, FilePath);
        string conStr = string.Empty;
        switch (Extension)
        {
            case ".xls": //Excel 97-03
                conStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + FilePath + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
                break;
            case ".xlsx": //Excel 07
                conStr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FilePath + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
                break;
        }
        OleDbConnection connExcel = new OleDbConnection(conStr);
        // OleDbCommand cmdExcel = new OleDbCommand();
        OleDbDataAdapter oda = new OleDbDataAdapter();
        DataTable dt = new DataTable();
        //cmdExcel.Connection = connExcel;
        try
        {
            connExcel.Open();
            DataTable dtExcelSchema;
            dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

            var SheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString();
            OleDbCommand cmdExcel = new OleDbCommand("SELECT * From [" + SheetName + "]", connExcel);
            cmdExcel.CommandText = "SELECT * From [" + SheetName + "]";
            oda.SelectCommand = cmdExcel;
            //oda.Fill(dt);



            oda.Fill(ds);
            DataTable exceldt = ds.Tables[0];
            //ViewState["dt"] = dt;
            // MessageBox.Show("try");
            string Result = string.Empty;
            int TotalCount = 0;
            int ResultCount = 0;
            int FailedCount = 0;
            int AlreadyCount = 0;
            //DataTable dt = new DataTable();
            //dt = ViewState["dt"] as DataTable;

            //TotalCount = dt.Rows.Count;
            List<string> ListLinkedIds = new List<string>();

            if (exceldt.Rows.Count > 0)
            {
                // MessageBox.Show("Enter");
                for (int i = 0; i < exceldt.Rows.Count; i++)
                {
                    objBO.QueryType = "Insert";
                    objBO.ProductID = exceldt.Rows[i]["Group"].ToString().Trim();
                    objBO.ProductGroupID = exceldt.Rows[i]["LocationId"].ToString().Trim();
                    objBO.ProductName = exceldt.Rows[i]["EquipmentName"].ToString().Trim();
                    objBO.BarcodeNo = exceldt.Rows[i]["EquipmentId"].ToString().Trim();
                    objBO.ProductModel = exceldt.Rows[i]["EquipmentModel"].ToString().Trim();
                    objBO.ProductSerial = exceldt.Rows[i]["EquipmentSerial"].ToString().Trim();
                    objBO.ProductMake = exceldt.Rows[i]["EquipmentMake"].ToString().Trim();
                    objBO.CalibrationFrequency = exceldt.Rows[i]["CalibrationFrequency"].ToString().Trim();
                    objBO.DateofPuechase = ValidateClass.ConvDMYTOYMD(exceldt.Rows[i]["DateofPuechase"].ToString()).Trim();
                    objBO.ASSETNo = exceldt.Rows[i]["ASSETNo"].ToString().Trim();
                    objBO.Calibrated = ValidateClass.ConvDMYTOYMD(exceldt.Rows[i]["CalibrationDate"].ToString()).Trim();
                    objBO.CalibrateDue = ValidateClass.ConvDMYTOYMD(exceldt.Rows[i]["CalibrateDue"].ToString()).Trim();
                    objBO.WarrantyDate = ValidateClass.ConvDMYTOYMD(exceldt.Rows[i]["WarrantyDate"].ToString()).Trim();
                    objBO.ProductRemark = exceldt.Rows[i]["EquipmentRemark"].ToString().Trim();
                    objBO.EmailBefore = exceldt.Rows[i]["EmailBefore"].ToString().Trim();
                    objBO.CalibratCertificate = null;
                    objBO.Location = "1";
                    objBO.Status = "Y";
                    objBO.CreatedBy = userName;
                    objBO.TransactionFlag = "N";
                    Result = objBAL.ProductMaster(objBO);

                    if (Result == "Success")
                    {
                        ResultCount = ResultCount + 1;
                    }
                    else if (Result == "Already")
                    {
                        AlreadyCount = AlreadyCount + 1;
                    }
                    else
                    {
                        FailedCount = FailedCount + 1;
                    }
                }
                if (TotalCount > 0)
                {
                    string TotalRecord = string.Empty;
                    string RecordSuccessfully = string.Empty;
                    string AlreadyExisting = string.Empty;
                    string RecordFailed = string.Empty;
                    if (TotalCount > 0)
                    {
                        TotalRecord = "Total Record" + ' ' + TotalCount.ToString();
                    }
                    else
                    {
                        TotalRecord = string.Empty;
                    }
                    if (ResultCount > 0)
                    {
                        RecordSuccessfully = ResultCount.ToString() + ' ' + "Record(s) are Inserted Successfully, ";
                    }
                    else
                    {
                        RecordSuccessfully = string.Empty;
                    }
                    if (AlreadyCount > 0)
                    {
                        AlreadyExisting = AlreadyCount.ToString() + ' ' + "Asset No. is Already Existing, ";
                    }
                    else
                    {
                        AlreadyExisting = string.Empty;
                    }
                    if (FailedCount > 0)
                    {
                        RecordFailed = FailedCount.ToString() + ' ' + "Record(s) are Failed, ";
                    }
                    else
                    {
                        RecordFailed = string.Empty;
                    }
                    BindProduct();
                    MessageBox.Show("Product Master", " " + TotalRecord + "( " + RecordSuccessfully + " " + AlreadyExisting + " " + RecordFailed + ")");
                }

                else
                {
                    MessageBox.Show("no rows");
                }
            }

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

            //MessageBox.Show("catch");
        }

    }
    else
    {
        MessageBox.Show("no rows");
    }

}