/// <summary>
///
/// </summary>
internal override ReturnResultBase Execute()
{
ReturnResultBase result = null;
if (LocalDataviewManager.UserSorts != null)
{
TaskViews.ApplySort(LocalDataviewManager.UserSorts);
}
else
{
if (!KeepUserSort)
{
TaskViews.ApplySort(Task.RuntimeSorts);
}
}
TaskViews.ApplyUserRangesAndLocates();
SetTaskMode();
if (RefreshMode == ViewRefreshMode.CurrentLocation)
{
InitCurrentPosition();
if (startPosition != null)
{
result = ExecuteRefreshAndKeepCurrentLocation();
if (result.Success)
{
LocalDataviewManager.UserGatewayLocates.Clear();
LocalDataviewManager.UserLocates.Clear();
LocalDataviewManager.UserSorts = null;
}
return(result);
}
}
// clean the position cache
LocalDataviewManager.Reset();
// Release the ViewMain cursor and re-prepare it.
if (TaskViews.ViewMain != null)
{
TaskViews.ViewMain.ReleaseCursor();
TaskViews.ViewMain.Prepare();
}
result = base.Execute();
if (result.Success)
{
DataviewSynchronizer.SetCurrentRecordByIdx(0);
LocalDataviewManager.UserGatewayLocates.Clear();
LocalDataviewManager.UserLocates.Clear();
LocalDataviewManager.UserSorts = null;
}
return(result);
}
/// <summary>
/// execute the view refresh command while keeping the current location.
/// </summary>
/// <param name="result"></param>
/// <returns></returns>
ReturnResultBase ExecuteRefreshAndKeepCurrentLocation()
{
ReturnResultBase result = new GatewayResult();
LocalDataviewManager.Reset();
//In order to build startposition using user locates reset the startposition.
if (LocalDataviewManager.HasUserLocates)
{
startPosition = null;
}
// Release the ViewMain cursor and re-prepare it.
if (TaskViews.ViewMain != null)
{
TaskViews.ViewMain.ReleaseCursor();
TaskViews.ViewMain.Prepare();
}
//Performing UpdateAfterFetch(), while fetching recs with startpos, may cause the task to enter in create/EmptyDataView mode, if
//no recs are fetched. This should be avoided because if no recs are fetched we should try fetching recs with no startpos.
PerformUpdateAfterFetch = false;
//if the location in not on 1st line, fetch from the current location backward
if (this.RefreshMode == ViewRefreshMode.CurrentLocation)
{
result = FetchBackward();
}
// fetch from current location forward
if (result.Success)
{
result = base.Execute();
}
PerformUpdateAfterFetch = true;
//look for the right record to set the dataview on
int currentRecordId = FindCurrentRecordRow();
// set the dataview on the right record - either the same record, if found, or the same line in te table,
// if the previously current record was deleted
if (currentRecordId != 0)
{
DataviewSynchronizer.SetCurrentRecord(currentRecordId);
}
else
{
//If no record found with CurrentLocation. Then set the RefreshMode as FirstRecord, Re-Execute ViewRefresh command.
if (((DataView)Task.DataView).getSize() == 0)
{
RefreshMode = ViewRefreshMode.FirstRecord;
result = Execute();
}
else
{
//If CurrentRecordRow is out of boundary of total records fetched, then set CurrentRecordRow on last record fetched.
CurrentRecordRow = CurrentRecordRow > ((DataView)Task.DataView).getSize() ? ((DataView)Task.DataView).getSize() : CurrentRecordRow;
DataviewSynchronizer.SetCurrentRecordByIdx(CurrentRecordRow - 1);
}
}
Task.RefreshDisplay();
return(result);
}
