Question

I am running into issues with an application that I wrote. Basically it is a month calendar that is made out of panels/listboxes for each day of the month. I populate my listboxes using the following:

private void PopulateEventListBoxes(int offsetNumber, int monthDays)
{
    string locationSelected = this.LocationComboBox.Text.ToLower();

    for (int i = 0; i <= (monthDays - 1); i++)
    {
        DateTime dateSelected = Convert.ToDateTime(m_ArrayDateLabel[offsetNumber + i].Text).Date;

        var tempCalendar = new Data.DataSet.vwGet_CalendarDetailsDataTable();

        switch (locationSelected)
        {
            case "all":
                Data.Manager.CalendarDetailsTableAdapter.FillByDate(tempCalendar, dateSelected);
                break;
            default:
                Data.Manager.CalendarDetailsTableAdapter.FillByDateCity(tempCalendar, dateSelected, locationSelected);
                break;
        }

        foreach (Data.DataSet.vwGet_CalendarDetailsRow row in tempCalendar)
        {
            ((ListBox)m_ArrayEventListBox[offsetNumber + i]).Items.Add(row.Name + " - " + row.StatusCode);
        }
    }
}

I am using the var tempCalendar = new Data.DataSet.vwGet_CalendarDetailsDataTable(); for the DataTable because I need to load the day events into each of the listboxes. This data is coming from SQL server from a view.

Once the Calendar loaded, the users have the ability to Add/Edit/Delete items through a pop-up Dialog with the Calendar details for the day. When the Dialog loads to Add/Edit I populate it this way:

private void SearchForEventsByDate()
{
    switch (m_LocationSelected)
    {
        case "all":
            Data.Manager.CalendarDetailsTableAdapter.FillByDate(DataSetCalendar.vwGet_CalendarDetails, m_DateSelected);
            CalendarDetailsBindingSource.DataSource = DataSetCalendar.vwGet_CalendarDetails;
            break;
        default:
            Data.Manager.CalendarDetailsTableAdapter.FillByDateCity(DataSetCalendar.vwGet_CalendarDetails, m_DateSelected, m_LocationSelected);
            CalendarDetailsBindingSource.DataSource = DataSetCalendar.vwGet_CalendarDetails;
            break;
    }

    RefreshRepRecordCount();
}

This time when load the data, I am using the call DataSetCalendar.vwGet_CalendarDetails instead of a temp memory version of the datatable.

My issue is coming into play if I follow these procedures:

1. Add new event for an employee
2. Delete that same event that I just added
3. Try and re-add new event for the employee on the same day – the app throws an error that the GUID is already present in the table.

My table’s primary key is EventDate and EmployeeGuid. If I query the SQL table after the delete, there is no record but my application still thinks the record still exists. I know that the record is in the memory.

I have tried the following to remove it from memory but it is not working:

DataSetCalendar.vwGet_CalendarDetails.FindByEmployeeGUID(SelectedCalendarEvent.EmployeeGUID).Delete();
DataSetCalendar.vwGet_CalendarDetails.AcceptChanges();

I have also tried using Remove to get rid of the record but my app still think the record exists. I don’t know what else to do or try. Any help would be great.

Answer 1

I was able to fix this by adding the Clear()

private void SearchForEventsByDate()
{
    switch (m_LocationSelected)
    {
       case "all":
         Data.Manager.Data.SM_T_Employee_Status.Clear();
         DataSetCalendar.vwGet_CalendarDetails.Clear();

         Data.Manager.CalendarDetailsTableAdapter.FillByDate(DataSetCalendar.vwGet_CalendarDetails, m_DateSelected);
          CalendarDetailsBindingSource.DataSource = DataSetCalendar.vwGet_CalendarDetails;
          break;
       default:
          Data.Manager.Data.SM_T_Employee_Status.Clear();
          DataSetCalendar.vwGet_CalendarDetails.Clear();
          Data.Manager.CalendarDetailsTableAdapter.FillByDateCity(DataSetCalendar.vwGet_CalendarDetails, m_DateSelected, m_LocationSelected);
          CalendarDetailsBindingSource.DataSource = DataSetCalendar.vwGet_CalendarDetails;
          break;
     }

 RefreshRepRecordCount();
 }