2015. 3. 2. 17:16
C#
프로그램 설명
BackgroundWorker 클래스를 이용한 프로그램을 만들어 봤습니다.
두 가지 방법으로 만들었는데,
첫번째 방법은 도구 상자에서 Background 컴포넌트를 디자인 화면에 드래그하는 방법과 두번째는 스크립트로 직접 타이핑을 하는 방법으로 개발했습니다.
첫번째 프로그램에 thread id 를 Debug 시에 출력을 해서 어떤 method 가 ui thread와 다르게 운영되는지 확인 해 보았습니다. 예상한대로 DoWork method 가 ui thread와 다르네요.
new Thread와 비교를 해보면 화면 출력을 편리하게 할 수 있고, 진행 상황을 확인해야 하는 프로그램에 적용하면 편리하게 사용이 가능할 듯 합니다.
실행 후
프로그램 작성
1. 첫번째 프로그램
public MainForm()
{
InitializeComponent();
Debug.WriteLine("MainForm() thread id : {0}", Thread.CurrentThread.ManagedThreadId);
}
#region start buton click method
private void btnStart_Click(object sender, EventArgs e)
{
if (backgroundWorker1.IsBusy)
label2.Text = "Busy processing, please waiting!!!!";
else
backgroundWorker1.RunWorkerAsync();
Debug.WriteLine("btnStart_Click() thread id : {0}", Thread.CurrentThread.ManagedThreadId);
}
#endregion
#region cancel buton click method
private void btnCalcel_Click(object sender, EventArgs e)
{
if (backgroundWorker1.IsBusy)
backgroundWorker1.CancelAsync();
else
label2.Text = "No cancel processing !!!";
Debug.WriteLine("btnCalcel_Click() thread id : {0}", Thread.CurrentThread.ManagedThreadId);
}
#endregion
#region backgroundworker DoWork event
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
Debug.WriteLine("backgroundWorker1_DoWork() thread id : {0}", Thread.CurrentThread.ManagedThreadId);
int sum = 0;
for(int i = 0; i<= 100; i++)
{
simulateHeavyWork();
sum += i;
backgroundWorker1.ReportProgress(i);
if (backgroundWorker1.CancellationPending)
{
e.Cancel = true;
backgroundWorker1.ReportProgress(0);
return;
}
}
e.Result = sum;
}
#endregion
#region simulate heavy work
private void simulateHeavyWork()
{
Thread.Sleep(100);
}
#endregion
#region backgroundworker ProgressChanged event
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Value = e.ProgressPercentage;
label1.Text = e.ProgressPercentage.ToString() + " %";
Debug.WriteLine("ProgressChanged() thread id : {0}", Thread.CurrentThread.ManagedThreadId);
}
#endregion
#region backgroundworker RunWorkerCompleted event
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Cancelled)
label1.Text = "Processing cancelled";
else if (e.Error != null)
label1.Text = e.Error.Message;
else
label1.Text = "Sum = " + e.Result.ToString();
Debug.WriteLine("backgroundWorker1_RunWorkerCompleted() thread id : {0}", Thread.CurrentThread.ManagedThreadId);
}
#endregion
#region program close
private void btnClose_Click(object sender, EventArgs e)
{
this.Close();
}
#endregion
2. 두번째 프로그램
private BackgroundWorker myWorker = null;
#region MainForm() - BackgroundWorker create
public MainForm()
{
InitializeComponent();
myWorker = new BackgroundWorker();
myWorker.WorkerReportsProgress = true;
myWorker.WorkerSupportsCancellation = true;
myWorker.DoWork += new DoWorkEventHandler(myWork_DoWork);
myWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(myWorker_RunWorkerCompleted);
myWorker.ProgressChanged += new ProgressChangedEventHandler(myWorker_ProgressChanged);
}
#endregion
#region backgroundworker DoWork event
void myWork_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker sendingWorker = sender as BackgroundWorker;
object[] arrObjects = e.Argument as object[];
int maxValue = (int)arrObjects[0];
StringBuilder sb = new StringBuilder();
float percentage = 0;
for (int i = 0; i <= maxValue; i++)
{
sb.Append(string.Format("Counting number : {0}{1}", PerformHeavyOperation(i), Environment.NewLine));
percentage = 100 / (float)maxValue * i;
sendingWorker.ReportProgress((int)percentage);
if (sendingWorker.CancellationPending)
{
e.Cancel = true;
break;
}
}
e.Result = sb.ToString();
}
#endregion
#region backgroundworker RunWorkerCompleted event
void myWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Cancelled)
{
lblStatus.Text = "User Cancelled";
}
else if (e.Error != null)
{
txtResult.Text = e.Error.ToString();
lblStatus.Text = "Error";
}
else
{
string result = e.Result.ToString();
txtResult.Text = result;
lblStatus.Text = "Done";
}
}
#endregion
#region backgroundworker ProgressChanged event
void myWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
lblStatus.Text = string.Format("Counting number : {0} %...", e.ProgressPercentage.ToString());
}
#endregion
#region simulate heavy work
private int PerformHeavyOperation(int i)
{
System.Threading.Thread.Sleep(100);
return i * 1000;
}
#endregion
#region start buton click method
private void btnStart_Click(object sender, EventArgs e)
{
int numericValue = (int)this.numericUpDown.Value;
object[] arrObjects = new object[] { numericValue };
if (!myWorker.IsBusy)
{
if (!string.IsNullOrEmpty(txtResult.Text))
txtResult.Text = "";
myWorker.RunWorkerAsync(arrObjects);
}
else
lblStatus.Text = "Work processing";
}
#endregion
#region clear click method
private void btnClear_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Clear data?", "Confirm", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.OK)
txtResult.Text = "";
}
#endregion
#region cancel buton click method
private void btnCancel_Click(object sender, EventArgs e)
{
if (myWorker.IsBusy)
{
myWorker.CancelAsync();
}
else
{
lblStatus.Text = "No cancel work";
}
}
#endregion
1번 예제 소스 :
BackgroundWorker1.zip
2번 예제 소스 :
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