private void Start1(object argument)
{
#region Set your CancelButton, ProgressBar, and StatusLabel here...
Form activeForm = this; // set myForm=this;
Button cancelButton = btnCancel;
ToolStripProgressBar progressBar = toolStripProgressBar1;
ToolStripLabel statusLabel = toolStripStatusLabel1;
// disable these controls when running...
Control[] userControls = new Control[] { textBox1, btnStart };
#endregion
bool isRunning = false;
EventHandler cancel = null;
FormClosingEventHandler formClosing = null;
BackgroundTask.Start(
argument,
delegate(object sender, DoWorkEventArgs e)
//(object sender, DoWorkEventArgs e) =>
{
#region DoWorkEventHandler - main code goes here...
// IMPORTANT: Do not access any GUI controls here. (This code is running in the background thread!)
var w = (BackgroundWorker)sender;
//Thread.CurrentThread.Priority = ThreadPriority.BelowNormal;
#region Do your work here...
int maxValue = Convert.ToInt32(e.Argument);
var sr = new StatusReport();
sr.SetBackgroundWorker(w, e, 1);
var r = new Random(DateTime.Now.Millisecond);
sr.ReportProgress("Processing", 0, maxValue, 0);
for (int i = 0; i < maxValue; i++)
{
sr.Value++;
sr.ReportProgress();
Thread.Sleep(r.Next(2));
}
sr.ReportProgress("Done", 0, maxValue, maxValue);
#endregion
#endregion
},
delegate(object sender, EventArgs e)
//(object sender, DoWorkEventArgs e) =>
{
#region EventHandler - initialize code goes here...
// It is safe to access the GUI controls here...
progressBar.Visible = true;
progressBar.Minimum = progressBar.Maximum = progressBar.Value = 0;
isRunning = true;
#region Hookup event handlers for Button.Canceland Form.FormClosing
var w = sender as BackgroundWorker;
if (w != null && w.WorkerSupportsCancellation)
{
if (cancelButton != null)
{
cancel = (object sender2, EventArgs e2) =>
{
//var w = sender2 as BackgroundWorker;
string msg = "The application is still busy processing. Do you want to stop it now?";
if (MessageBox.Show(msg, "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
{
w.CancelAsync();
}
};
cancelButton.Click += cancel;
cancelButton.Enabled = true;
}
}
// also, confirm the user if the user clicks the close button.
if (activeForm != null)
{
formClosing = (object sender2, FormClosingEventArgs e2) =>
{
if (!isRunning)
{
return;
}
string msg = "The application is still busy processing. Do you want to close the application anyway?";
e2.Cancel = MessageBox.Show(msg, "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning,
MessageBoxDefaultButton.Button2) != DialogResult.Yes;
};
activeForm.FormClosing += formClosing;
}
#endregion
FormUtil.Busy(activeForm, userControls, true);
#endregion
},
delegate(object sender, ProgressChangedEventArgs e)
//(object sender, ProgressChangedEventArgs e) =>
{
#region ProgressChangedEventHandler - update progress code goes here...
// It is safe to access the GUI controls here...
var sr = e.UserState as StatusReport;
if (sr == null)
{
return;
}
StatusReport.UpdateStatusReport(progressBar, sr);
statusLabel.Text = sr.ToString();
txtLog.AppendText(string.Format("{0} : {1:N0}" + Environment.NewLine, sr, sr.Value));
#endregion
},
delegate(object sender, RunWorkerCompletedEventArgs e)
//(object sender, RunWorkerCompletedEventArgs e) =>
{
#region RunWorkerCompletedEventHandler - cleanup code goes here...
// It is safe to access the GUI controls here...
try
{
if (e.Error != null)
{
throw e.Error;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), ex.Message);
}
finally
{
FormUtil.Busy(activeForm, userControls, false);
progressBar.Visible = false;
if (cancel != null)
{
cancelButton.Click -= cancel;
cancelButton.Enabled = false;
}
if (formClosing != null)
{
activeForm.FormClosing -= formClosing;
}
isRunning = false;
statusLabel.Text = "Ready";
}
#endregion
});
}
