如何在时间间隔较短和Timer1_Tick更新数据库并重新绑定数据时顺利运行

当定时器间隔较短且定时器滴答时，运行数据库操作并更新asp.net web用户界面，我不能输入文本或选择下拉列表。

在实时操作数据库时如何做到不影响用户的操作?

如果有很多用户，恐怕会影响数据库的性能如慢

我已经设置它在更改时更新，但仍然相当频繁地干预操作，例如我不能选择下拉列表或不能在文本框中输入

</ContentTemplate>
    <Triggers>
        <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" /> 
    </Triggers> 
    </asp:UpdatePanel>
protected void Timer1_Tick(object sender, EventArgs e)
        {
            string[] last_serial_no = new string[Calculator_GridView.Rows.Count];
            string[] last_a1_textbox = new string[Calculator_GridView.Rows.Count];
            string[] last_b1_textbox = new string[Calculator_GridView.Rows.Count];
            string[] last_mp_dropdown = new string[Calculator_GridView.Rows.Count];
            bool change = false;
            for (int i = 0; i < Calculator_GridView.Rows.Count; i++)
            {
                string serial_no = Calculator_GridView.Rows[i].Cells[1].Text;
                string a1_textbox = Calculator_GridView.Rows[i].Cells[2].Text;
                string b1_textbox = Calculator_GridView.Rows[i].Cells[3].Text;
                DropDownList mp_dropdown = (DropDownList)Calculator_GridView.Rows[i].Cells[4].Controls[1];
                //TextBox Result_textbox = (TextBox)Calculator_GridView.Rows[e.RowIndex].Cells[5].Controls[0];
                if (last_serial_no[i] != serial_no ||
                last_a1_textbox[i] != a1_textbox ||
                last_b1_textbox[i] != b1_textbox ||
                last_mp_dropdown[i] != mp_dropdown.SelectedValue)
                {
                    string executestring = "";
                    executestring = "Update cal set a1=" + a1_textbox;
                    executestring = executestring + ", b1=" + b1_textbox;
                    executestring = executestring + ", mp=" + mp_dropdown.SelectedValue;
                    executestring = executestring + ", result=" + (Convert.ToDouble(mp_dropdown.SelectedValue) * Convert.ToDouble(b1_textbox)).ToString();
                    executestring = executestring + " where [識別碼]=" + serial_no;
                    ExecuteDatabase(executestring);
                    change = true;
                }
                last_serial_no[i] = serial_no;
                last_a1_textbox[i] = a1_textbox;
                last_b1_textbox[i] = b1_textbox;
                last_mp_dropdown[i] = mp_dropdown.SelectedValue;
            }
            if (change == true)
            {
                string connstr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|/db1.mdb";
                OleDbConnection conn = new OleDbConnection(connstr);
                conn.ConnectionString = connstr;
                try
                {
                    conn.Open();
                }
                catch (Exception ex)
                {
                    conn.Close();
                }
                OleDbCommand get_info_cmd = null;
                get_info_cmd = new OleDbCommand("SELECT [識別碼], [a1], [b1], [result], [mp] FROM [cal]", conn);
                OleDbDataReader get_info_Reader = get_info_cmd.ExecuteReader();
                store.Columns.Add(new DataColumn("識別碼", typeof(int)));
                store.Columns.Add(new DataColumn("a1", typeof(double)));
                store.Columns.Add(new DataColumn("b1", typeof(double)));
                store.Columns.Add(new DataColumn("mp", typeof(double)));
                store.Columns.Add(new DataColumn("result", typeof(double)));
                DataRow dr;
                try
                {
                    while (get_info_Reader.Read())
                    {
                        dr = store.NewRow();
                        dr[0] = get_info_Reader["識別碼"].ToString();
                        dr[1] = get_info_Reader["a1"].ToString();
                        dr[2] = get_info_Reader["b1"].ToString();
                        dr[3] = get_info_Reader["mp"].ToString();
                        dr[4] = (Convert.ToDouble(get_info_Reader["b1"].ToString()) * Convert.ToDouble(get_info_Reader["mp"].ToString())).ToString();
                        store.Rows.Add(dr);
                    }
                }
                catch (Exception ex)
                {
                    Error_Label.Text = Error_Label.Text + ex.ToString();
                    conn.Close();
                }
                finally
                {
                    get_info_cmd.Dispose();
                    get_info_Reader.Close();
                    conn.Close();
                }
                storeview = new DataView(store);
                Calculator_GridView.Font.Size = new FontUnit(10);
                Calculator_GridView.DataSourceID = "";
                Calculator_GridView.DataSource = storeview;
                Calculator_GridView.DataBind();
            }
        }