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How to use transaction in sqlbulk in asp.net

There are many situation where you need to use transactions in order to avoid incorrect updation or half updation in the database.SO we use transaction that either all data updated or nothing will effect.
Here is the code :

 SqlTransaction trans;
        if (con.State == ConnectionState.Closed)
            con.Open();
        trans = con.BeginTransaction();
        try
        {
            DataTable dtCourses = new DataTable();
            dtCourses.Columns.Add(new DataColumn("RegistrationNumber", typeof(long)));
            dtCourses.Columns.Add(new DataColumn("CurrentTerm", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("RegistrationForTerm", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("RegistrationStatus", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("AmountPaid", typeof(int)));
            dtCourses.Columns.Add(new DataColumn("DDNumber", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("DDAmount", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("DDDate", typeof(DateTime)));
            dtCourses.Columns.Add(new DataColumn("BankName", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("Remarks", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("EntryBy", typeof(string)));
            dtCourses.Columns.Add(new DataColumn("EntryDateTime", typeof(string)));
            foreach (GridDataItem item in RadGrid1.MasterTableView.Items)
            {
                if ((item.FindControl("RegistrationStatusLabel") as Label).Text == "" && (item.FindControl("RadioButtonList1") as RadioButtonList).SelectedIndex != -1)
                {
                    DataRow dr = dtCourses.NewRow();
                    dr["RegistrationNumber"] = (item.FindControl("RegisterationNumberLabel") as Label).Text;
                    dr["CurrentTerm"] = (item.FindControl("CurrentTermLabel") as Label).Text;
                    dr["RegistrationForTerm"] = (item.FindControl("RegistrationForTermLabel") as Label).Text;
                    dr["RegistrationStatus"] = (item.FindControl("RadioButtonList1") as RadioButtonList).SelectedValue.ToString();
                    if ((item.FindControl("RadioButtonList1") as RadioButtonList).SelectedValue.ToString() != "Skip")
                        dr["AmountPaid"] = (item.FindControl("txtamount") as TextBox).Text;
                    else
                        dr["AmountPaid"] = 0;
                    if ((item.FindControl("RadioButtonList1") as RadioButtonList).SelectedValue.ToString() != "Skip")
                        dr["DDAmount"] = (item.FindControl("txtddamount") as TextBox).Text;
                    else
                        dr["DDAmount"] = 0;
                    dr["DDNumber"] = (item.FindControl("txtddnumber") as TextBox).Text;
                    if ((item.FindControl("RadioButtonList1") as RadioButtonList).SelectedValue.ToString() != "Skip")
                        dr["DDDate"] = (item.FindControl("rdpdddate") as RadDatePicker).SelectedDate.Value;
                    else
                        dr["DDDate"] = DBNull.Value;
                    if ((item.FindControl("RadioButtonList1") as RadioButtonList).SelectedValue.ToString() != "Skip")
                        dr["BankName"] = (item.FindControl("txtbankname") as DropDownList).SelectedItem.ToString();
                    else
                        dr["BankName"] = DBNull.Value;
                    if ((item.FindControl("RadioButtonList1") as RadioButtonList).SelectedValue.ToString() != "Skip")
                        dr["Remarks"] = (item.FindControl("txtremarks") as TextBox).Text;
                    else
                        dr["BankName"] = DBNull.Value;
                    dr["EntryBy"] = HiddenFieldLoginName.Value.ToString();
                    dr["EntryDateTime"] = DateTime.Now.ToString();
                    dtCourses.Rows.Add(dr);
                }
            }
            SqlBulkCopy SaveData = new SqlBulkCopy(con, SqlBulkCopyOptions.CheckConstraints | SqlBulkCopyOptions.FireTriggers, trans);
            SaveData.ColumnMappings.Add("RegistrationNumber", "RegistrationNumber");
            SaveData.ColumnMappings.Add("CurrentTerm", "CurrentTerm");
            SaveData.ColumnMappings.Add("RegistrationForTerm", "RegistrationForTerm");
            SaveData.ColumnMappings.Add("RegistrationStatus", "RegistrationStatus");
            SaveData.ColumnMappings.Add("AmountPaid", "AmountPaid");
            SaveData.ColumnMappings.Add("DDNumber", "DDNumber");
            SaveData.ColumnMappings.Add("DDAmount", "DDAmount");
            SaveData.ColumnMappings.Add("DDDate", "DDDate");
            SaveData.ColumnMappings.Add("BankName", "BankName");
            SaveData.ColumnMappings.Add("Remarks", "Remarks");
            SaveData.ColumnMappings.Add("EntryBy", "EntryBy");
            SaveData.ColumnMappings.Add("EntryDateTime", "EntryDateTime");
            SaveData.DestinationTableName = "OdlStudentReRegistration";
            SaveData.WriteToServer("YOUR TABLE NAME");
            trans.Commit();
            dtCourses.Clear();
            DisplayAJAXMessage(this, "Submitted Successfuly ");

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