C # Asynchronous progress bar Component BackgroundWorker

The control event calls the DoWork () method on the line.
   
#regionProgress barPrivateBackgroundWorker worker =NULL; Private voidDoWork (stringoutfile) {            //Show progress barProgressform Progressform =NewProgressform (); Progressform.topmost=true; Progressform.show ( This);            //the count of the preparation progress barWorker =NewBackgroundWorker ();            //specify to provide progress notificationsWorker. Workerreportsprogress =true;            //provides interrupt functionalityWorker. Workersupportscancellation =true;            //The main function of a thread is to handle events//turn on thread execution workWorker. DoWork + =NewDoworkeventhandler (worker_dowork); //specify the function to handle progress//Specify the features used to process progressWorker. ProgressChanged + =NewProgresschangedeventhandler (progressform.onprogresschanged); Worker. ProgressChanged+=NewProgresschangedeventhandler (worker_progresschanged);            //The progress bar finishes the work//1. Work completed//2. Work Error Exception//3. Cancellation of workWorker. RunWorkerCompleted + =NewRunworkercompletedeventhandler (progressform.onprocesscompleted); Worker. RunWorkerCompleted+=NewRunworkercompletedeventhandler (worker_runworkercompleted);            //If the progress bar requires parameters//Call System.ComponentModel.BackgroundWorker.RunWorkerAsync//Pass in your parameters to System.ComponentModel.BackgroundWorker.DoWork//Extracting Parameters//System.ComponentModel.DoWorkEventArgs.Argumentworker.        RunWorkerAsync (outfile); }        //single thread execution work        Private voidWorker_dowork (Objectsender, DoWorkEventArgs e) {            Try{worker_doing (BackgroundWorker) sender, E); }            Catch(Exception ex) {
This is exception handling and cannot be placed inside the worker_doing E.result=ex; }        }        //to work        Private voidworker_doing (BackgroundWorker worker, DoWorkEventArgs e) {stringoutfile = E.argument as string;//Incoming ParametersintCount =500;  for(inti =0; I < count; i++)            {                //Check Cancel                if(worker. cancellationpending) {E.cancel=true;  Break; }                Else{//Here is the specific work code
                    //...
Progress report worker. ReportProgress ((i+1) * ( -/count), "Progress Information"); //Thread HibernationThread.Sleep ( -); }            }        }                //Progress Report        Private voidWorker_progresschanged (Objectsender, ProgressChangedEventArgs e) {//Here The progress information can be displayed in the window
E.userstate As String
//...
        }        //Work Completion Status        Private voidWorker_runworkercompleted (Objectsender, Runworkercompletedeventargs e) {            stringMessage =""; if(E.error! =NULL) {Message=E.error.message;MessageBox.Show ( This, Message,"Exception"); }            Else if(e.cancelled) {message="The operation was canceled. "; MessageBox.Show ( This, Message,"Tips"); }            Else            {                if(E.result = =NULL) {Message="completed. "; MessageBox.Show ( This, Message,"Information"); }                Else{message= (E.result asException).                    Message; MessageBox.Show ( This, Message,"Exception"); }            }//The code here is done after the completion of the processing work
//...        } #endregion

C # Asynchronous progress bar Component BackgroundWorker