[BackGroundWorkerTEST] Sync , Async , Thread
주요 Code
BWTEst.zipMSDN
http://msdn.microsoft.com/ko-kr/library/system.componentmodel.backgroundworker(v=VS.90).aspx?appId=Dev10IDEF1&l=KO-KR&k=k(EHINVALIDOPERATION.WINFORMS.ILLEGALCROSSTHREADCALL);k(TargetFrameworkMoniker-".NETFRAMEWORK&k=VERSION=V3.5");k(DevLang-CSHARP)&rd=true
Created with colorer-take5 library. Type 'csharp' //sync private void testCodeSync() { using (System.Net.WebClient wc = new System.Net.WebClient()) { wc.DownloadFile(streamPath, "test_"+checkTime.ToString()+currentState+".tmp"); } stateTx.Text = currentState + " :: done"; } //async private void testCodeAsync() { using (System.Net.WebClient wc = new System.Net.WebClient()) { wc.DownloadFileAsync(streamPath, "test_" + checkTime.ToString() + currentState + ".tmp"); } stateTx.Text = currentState + " :: done"; } //################ //backgroundworker BackgroundWorker bw = new BackgroundWorker(); void BGWorker() { //bw = new BackgroundWorker(); bw.RunWorkerAsync(); bw.DoWork += new DoWorkEventHandler(bw_DoWork); bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted); } void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { //RunWorkerCompleted 이벤트 안에서는 윈폼 스레드로 돌아와 안전��게 컨트롤 할�� 있다. stateTx.Text = currentState + " :: done"; bw.Dispose(); } void bw_DoWork(object sender, DoWorkEventArgs e) { using (System.Net.WebClient wc = new System.Net.WebClient()) { wc.DownloadFile(streamPath, "test_" + checkTime.ToString() + currentState + ".tmp"); } //에러! : 크로스 스레딩 ( 스레드가 다르다 ) //stateTx.Text = currentState + " :: done"; }인터넷 속도가 빠를경우 테스트가 잘 되지 않지만 Async 도 처음에 실행할때는 약간의 딜레이가 생긴다
sync 는 항상 딜레이가 생긴다.
테스트 타겟은 구글의 메인페이지 이다.
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C#
2010. 12. 4. 02:26
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