saving multiple record at once

[cyberdaemon]

how can i save multiple record in single click using user define data type in SQL
i am having problem in selecting the value in gridview using checkbox

here my code

View

// View LAyer

 protected void imgbtnSave_Click(object sender, EventArgs e)
        {
            DataTable dtTable = new DataTable();
            DataRow dtRow = dtTable.NewRow();
           for (int i = 0; i < gvTaggingAccounts.Rows.Count; i++)
              {
                  GridViewRow row = gvTaggingAccounts.Rows[i];
                  bool isChecked = ((CheckBox)row.FindControl("chkTypes")).Checked;
               if(isChecked)
                {
                    dtRow["AccountNUM"] = gvTaggingAccounts.Rows[i].Cells[1].Text; //having error here.. not belong to the table.. 
                    dtRow["Accoutname"] = gvTaggingAccounts.Rows[i].Cells[2].Text;
                   dtTable.Rows.Add(dtRow);
                    _taggingAccountsManager.InsertAXPerDepartment();
                } 
            }
        }
       // DLSQL Layer 
            public override bool InsertAXPerDepartment()
            {
                var isSuccess = false;
                try
                {
                    _sqlHelper.CreateConnection();
                    _sqlHelper.CreateCommand("usp_InsertAXPerDepartment");
                    _sqlHelper.ExecuteNonQuery();
                }
                catch (Exception ex)
                {
                    ErrorHandler.Handle(ex);
                    OnRaiseErrorOccuredEvent(this, new ErrorEventArgs(ex));
                }
                finally
                {
                    _sqlHelper.CloseConnection();
                }
                return isSuccess;
            }
            public override bool InsertAXPerDepartment(DataTable AcctTag)
            {
                var isSuccess = false;
                try
                {
                    _sqlHelper.CreateConnection();
                    _sqlHelper.CreateCommand("usp_InsertAXPerDepartment");
                    _sqlHelper.Command.CommandType = CommandType.StoredProcedure;
                    _sqlHelper.Command.Parameters.Add("@AcctTag" ,SqlDbType.Structured);
                    SqlParameter Param = _sqlHelper.Command.Parameters.Add("@AcctTag", SqlDbType.Structured);
                    Param.Value = AcctTag;
                    ErrorHandler.Handle(ex);
                    OnRaiseErrorOccuredEvent(this, new ErrorEventArgs(ex));
                }
                finally
                {
                    _sqlHelper.CloseConnection();
                }
                return isSuccess;
            }
            my user define table is working together with the stored proc..
            anyone can solve this problem.. 
            thanks 
    protected void imgbtnSave_Click(object sender, EventArgs e)
        {
            DataTable dtTable = new DataTable();
            DataRow dtRow = dtTable.NewRow();
           for (int i = 0; i < gvTaggingAccounts.Rows.Count; i++)
              {
                  GridViewRow row = gvTaggingAccounts.Rows[i];
                  bool isChecked = ((CheckBox)row.FindControl("chkTypes")).Checked;
               if(isChecked)
                {
                    dtRow["AccountNUM"] = gvTaggingAccounts.Rows[i].Cells[1].Text; //having error here.. not belong to the table.. 
                    dtRow["Accoutname"] = gvTaggingAccounts.Rows[i].Cells[2].Text;
                   dtTable.Rows.Add(dtRow);
                    _taggingAccountsManager.InsertAXPerDepartment();
                } 
            }
        }
        DLSQL
            public override bool InsertAXPerDepartment()
            {
                var isSuccess = false;
                try
                {
                    _sqlHelper.CreateConnection();
                    _sqlHelper.CreateCommand("usp_InsertAXPerDepartment");
                    _sqlHelper.ExecuteNonQuery();
                }
                catch (Exception ex)
                {
                    ErrorHandler.Handle(ex);
                    OnRaiseErrorOccuredEvent(this, new ErrorEventArgs(ex));
                }
                finally
                {
                    _sqlHelper.CloseConnection();
                }
                return isSuccess;
            }
            public override bool InsertAXPerDepartment(DataTable AcctTag)
            {
                var isSuccess = false;
                try
                {
                    _sqlHelper.CreateConnection();
                    _sqlHelper.CreateCommand("usp_InsertAXPerDepartment");
                    _sqlHelper.Command.CommandType = CommandType.StoredProcedure;
                    _sqlHelper.Command.Parameters.Add("@AcctTag" ,SqlDbType.Structured);
                    SqlParameter Param = _sqlHelper.Command.Parameters.Add("@AcctTag", SqlDbType.Structured);
                    Param.Value = AcctTag;
                    ErrorHandler.Handle(ex);
                    OnRaiseErrorOccuredEvent(this, new ErrorEventArgs(ex));
                }
                finally
                {
                    _sqlHelper.CloseConnection();
                }
                return isSuccess;
            }