Question

当用户向系统添加学校课程时，他们会选择课程的开始和结束日期。我已经研究了如何计算它的天数并将其存储在'TotalDayNumber'列中的数据库表'Class'中。

目前，当用户添加一个类时，它只会在数据库中插入一行，但我想为每一天'TotalDayNumber'添加相同数量的行。

例如，如果开始日期是01/03/2017 - 15/03/17 - 总天数为14，那么我想创建总共14行来代表每一天。 '下面是我的INSERT查询。我相信我需要一个IF声明，但我不知道如何开始它。

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

将总天数设为int，然后添加带有for循环的插入命令，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();
    }

根据用户值创建多个INSERT语句

1 个答案: