Dobby233Liu
commented
1 year ago creation date = 2009-03-04T10:48:35.51-08:00
I've experienced these quite alot some time ago... my solution for fixing it was implementing a pool of threads. In my app there are about 7-8 concurrent threads and some of course will require access to the UI.
When working with the tree from another thread you should go for something like if (this.InvokeRequired) ... and use BeginUpdate() and EndUpdate() when using data from the tree.
This is my ThreadMgr class, feel free to adapt it to your needs.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using System.Collections;
namespace LUR.Interop
{
public class ThreadMgr : IDisposable, IEnumerable
{
private List<Thread> Pool = null;
public ThreadMgr()
{
Pool = new List<Thread>();
}
public int Clean()
{
int Running = 0;
if (Pool == null)
return Running;
for (int i = 0; i < Pool.Count; i++)
{
if (Pool[i].IsAlive)
Running++;
else
Pool.Remove(Pool[i--]);
}
return Running;
}
public bool this[string Item, ThreadStart x]
{
set
{
Thread t = this[Item];
if (t == null)
{
try
{
if (x == null)
throw new System.ArgumentNullException();
t = this[Item] = new Thread(x);
t.TrySetApartmentState(ApartmentState.MTA);
if (value)
t.Start();
}
catch (System.ArgumentNullException)
{
Console.WriteLine("ThreadMgr: null or malformed parameterized thread start invoked.");
}
catch (System.Threading.ThreadStateException msg)
{
Console.WriteLine("ThreadMgr: failed " + msg.Message + " at " + msg.Source + " in " + Item + " context");
}
catch (Exception msg)
{
Console.WriteLine("ThreadMgr: unrecoverable fault caused by " + msg.Message + " in " + msg.StackTrace);
}
}
else
{
// Ionutz: testeaza-ma!
MessageBox.Show(null, Item + " context is already locked or request is null; cannot instanciate.\n" +
"You may be trying to re-execute the same operation before waiting the previous attempt to complete",
"Threading Manager", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
}
public Thread this[string Item]
{
get
{
if ((Pool != null) && (Pool.Count > 0))
{
foreach (Thread t in Pool)
if (t.Name == Item)
return t;
}
return null;
}
set
{
if (Pool == null)
Pool = new List<Thread>();
try
{
Pool.Add(value);
value.Name = Item;
}
catch (Exception msg)
{
Console.WriteLine("ThreadMgr: " + msg.Message + "; " + value.Name + " override attempt with " + Item + " denied.");
}
}
}
public void Sync(string Item)
{
Thread t = this[Item];
try
{
if (t.IsAlive)
t.Join();
}
catch { }
}
#region IDisposable Members
public void Dispose()
{
if ((Pool != null) && (Pool.Count > 0))
{
for (int i = 0; i < Pool.Count; i++)
{
if (Pool[i].IsAlive)
Pool[i].Abort();
Pool.Remove(Pool[i--]);
}
}
}
#endregion
public void Recycle(string id)
{
try
{
foreach (Thread Pooled in Pool)
{
if (Pooled.Name.Contains(id))
{
Pooled.Abort();
break;
}
}
}
catch
{ }
}
#region IEnumerable Members
public IEnumerator GetEnumerator()
{
foreach (Thread t in Pool)
{
yield return t;
}
}
#endregion
}
}
creation date =
2009-02-28T18:24:34.03-08:00Error in Anolis Resourcer 0.8 Beta: Spoke to W3bbo about it; I was navigating the program's loaded DLL components too quickly in tree view. (aka: I was being too rough with the program; I need to be more gentle with it.... Patience, I guess.) W3bbo: yeah, you were just going too fast for it W3bbo: I'll see if there's a way to queue-up the BackgroundWorker rather than interrupting it W3bbo: in future, just be more gentle with it :p -------------------------------------Debug report below-------------------------------------