根據用戶值創建多個INSERT語句

Question

用戶將學校課程添加到系統時，他們選擇課程的開始日期和結束日期。 我已經弄清楚了如何計算天數並將其存儲在數據庫表“ Class”中“ TotalDayNumber”列中。

當前，當用戶添加一個類時，它僅向數據庫中插入一行，但是我想為每一天“ TotalDayNumber”添加相同數量的行。

例如，如果開始日期為01/03/2017-15/03/17-總天數為14，那么我想創建14個總行來代表每天。 '下面是我的INSERT查詢。 我相信我需要IF語句，但我什至不知道如何開始。

protected void insertbutton_Click(object sender, EventArgs e)
    {

        int? recurrencedata = Convert.ToInt32(ddlRecurrence.Text);
        if (recurrencedata == 1)
        {
            int moduledata = Convert.ToInt32(ddlModule.Text);
            DateTime startdatedata = Convert.ToDateTime(txtstartdate.Text);
            DateTime enddatedata = Convert.ToDateTime(txtenddate.Text);
            int classtypedata = Convert.ToInt32(ddlClassType.Text);
            int roomcodedata = Convert.ToInt32(ddlRoomCode.Text);
            int starttimedata = Convert.ToInt32(ddlStartClassTime.Text);
            int endtimedata = Convert.ToInt32(ddlEndClassTime.Text);

            startdatedata = DateTime.Parse(txtstartdate.Text).Date;
            enddatedata = DateTime.Parse(txtenddate.Text).Date;

            TimeSpan totaldays = enddatedata - startdatedata;

            // This is rounding the TimeSpan to the day value only
            string totalday = ((int)Math.Round(totaldays.TotalDays, MidpointRounding.AwayFromZero)).ToString();

            string DefaultConnection = WebConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;
            SqlConnection myConnection = new SqlConnection(DefaultConnection);

            myConnection.Open();

            string query = "INSERT INTO Class (ModuleId, ClassTypeId,  ClassScheduleStartTimeId, ClassScheduleEndTimeId, RoomCodeId, StartTime, EndTime, RecurrenceId, TotalDayNumber) VALUES ( @moduledata, @classtypedata, @starttimedata, @endtimedata, @roomcodedata, @startdatedata, @enddatedata,  @recurrencedata, @totaldaynumberdata)";

            SqlCommand myCommand = new SqlCommand(query, myConnection);
            myCommand.Parameters.AddWithValue("@moduledata", moduledata);
            myCommand.Parameters.AddWithValue("@classtypedata", classtypedata);
            myCommand.Parameters.AddWithValue("@startdatedata", startdatedata);
            myCommand.Parameters.AddWithValue("@enddatedata", enddatedata);
            myCommand.Parameters.AddWithValue("@starttimedata", starttimedata);
            myCommand.Parameters.AddWithValue("@roomcodedata", roomcodedata);
            myCommand.Parameters.AddWithValue("@endtimedata", endtimedata);
            myCommand.Parameters.AddWithValue("@recurrencedata", recurrencedata);
            myCommand.Parameters.AddWithValue("@totaldaynumberdata", totalday);
            myCommand.ExecuteNonQuery();
            myConnection.Close();

            SuccessPanel.Visible = true;    
        }

}

Answer 1

以int獲取總天數，然后添加帶有for循環的插入命令，如下所示

    // add for loop 
    for(int i =0; i <= totalday; i++)
    {
        myConnection.Open();

        string query = "INSERT INTO Class (ModuleId, ClassTypeId,  ClassScheduleStartTimeId, ClassScheduleEndTimeId, RoomCodeId, StartTime, EndTime, RecurrenceId, TotalDayNumber) VALUES ( @moduledata, @classtypedata, @starttimedata, @endtimedata, @roomcodedata, @startdatedata, @enddatedata,  @recurrencedata, @totaldaynumberdata)";

        SqlCommand myCommand = new SqlCommand(query, myConnection);
        myCommand.Parameters.AddWithValue("@moduledata", moduledata);
        myCommand.Parameters.AddWithValue("@classtypedata", classtypedata);
        myCommand.Parameters.AddWithValue("@startdatedata", startdatedata);
        myCommand.Parameters.AddWithValue("@enddatedata", enddatedata);
        myCommand.Parameters.AddWithValue("@starttimedata", starttimedata);
        myCommand.Parameters.AddWithValue("@roomcodedata", roomcodedata);
        myCommand.Parameters.AddWithValue("@endtimedata", endtimedata);
        myCommand.Parameters.AddWithValue("@recurrencedata", recurrencedata);
        myCommand.Parameters.AddWithValue("@totaldaynumberdata", totalday);
        myCommand.ExecuteNonQuery();
        myConnection.Close();
    }