private void LoadInstances()
{
var worker = new BackgroundWorker();
worker.WorkerReportsProgress = true;
//
// Enumerates the instances on a background thread
//
worker.DoWork += (sender, e) =>
{
string name = e.Argument as string;
worker.ReportProgress(0, "<unnamed>");
var instances = new PerformanceCounterCategory(name).GetInstanceNames();
foreach (var item in instances.OrderBy(i => i))
worker.ReportProgress(0, item);
};
//
// Adds instances to drop down list
//
worker.ProgressChanged += (sender, e) =>
{
instanceComboBox.Items.Add(e.UserState);
};
//
// Cleans up UI
//
worker.RunWorkerCompleted += (sender, e) =>
{
Cursor = Cursors.Default;
if (instanceComboBox.Items.Count > 0)
instanceComboBox.SelectedIndex = 0;
};
Cursor = Cursors.WaitCursor;
counterList.Items.Clear();
instanceComboBox.Items.Clear();
worker.RunWorkerAsync(categoryComboBox.SelectedItem);
}