public async Task <bool> UpdateAsync(StatusInfo info, CancellationToken token) // return remain time information
{
int len = 100;
info.StatusMax = len;
var tempData = await Task.Run(() => GetData(info, token));
if (token.IsCancellationRequested)
{
return(false);
}
info.CurrentStatus = len;
var comparer = new ProcessComparer();
//Delete old elements
var old = ProcessInfos.Except(tempData, comparer).ToList();
foreach (var d in old)
{
ProcessInfos.Remove(d);
}
//Add new elements
var newElements = tempData.Except(ProcessInfos, comparer);
foreach (var element in newElements)
{
ProcessInfos.Add(element);
}
return(true);
}
/// <summary>Constructor.</summary>
public ProcessSelectionDialog()
{
InitializeComponent();
// Hide the caret on the filter text box (by setting it to a transparent brush)
m_defaultFilterTextBoxBrush = m_txtFilter.CaretBrush;
m_txtFilter.CaretBrush = TRANSPARENT_BRUSH;
// Use a custom sorting algorithm for the list of processes view
ProcessComparer processComparer = new ProcessComparer();
ListCollectionView processesListCollectionView = (ListCollectionView)m_lstProcesses.ItemsSource;
processesListCollectionView.CustomSort = processComparer;
// Configure the Timer used to update the list of processes
Action updateProcessesListAction = () =>
{
Process selectedProcess = (Process)m_lstProcesses.SelectedItem;
AvailableProcesses.Clear();
foreach (Process curProc in Process.GetProcesses())
{
AvailableProcesses.Add(curProc);
if (selectedProcess != null && curProc.Id == selectedProcess.Id)
{
m_lstProcesses.SelectedItem = curProc;
}
}
};
m_processesListUpdateTimer.Elapsed += (sender, args) =>
{
// Use the dispatcher to update the list of processes in the same Thread that
// created the dialog
this.Dispatcher.Invoke(updateProcessesListAction);
};
// Manually fire the method that updates the list of processes, so that the list gets updated immediatelly
// when the dialog is opened
updateProcessesListAction();
m_processesListUpdateTimer.Start();
}
