Introduction:
Today, Develpers use threading
in their Project. So Today, I will explaining threading and threading Concepts.I
am using Backgroundworker and Timer.
BackgroundWorker:
1.
It is a light weight Component.
2.
It makes threads easy to implement in
Windows Form.
3.
UI doesn’t freeze .Because Intensive task
needs to be done on another Thread.
Three Threads in
Dot Net:
1.
Thread
2.
ThreadPool
3.
Backgroundworker
We
will discuss about first 2 in later Articles.Now we discuss about
Backgroundworker.
Three Events in Backgroundworker:
1)
Dowork Event.
2)
ProgressChanged Event.
3)
RunWorkerCompleted Event.
1) Dowork Event:
First, Dowork event
will start.
User can give a
expensive code in this Event.
2) ProgressChanged Event:
add
code to indicate the progress, such as updating the user interface.
3) RunWorkerCompleted Event:
It is raised when the background
worker has completed.
How
to Start Backgroundworker?
Using backgroundworker1.RunWorkAsync();
How
to Stop Backgroundworker?
Using backgroundworker1. CancelAsync ();
Where
to set RunWorkAsync() and CancelAsync ()?
You can set where ever you want .
For
Eg:
We have Two Button. One is Start Thread and
another One is Stop Thread.
·
Call RunWorkAsync()
in Start Thread Button.
·
Call CancelAsync () in Stop Thread Button.
I
think, you get idea about Background worker and Thread.Now we will go to our
Project.This is a Simple Project.
Project Name: File(s)TransferSystem(FTS).
Project Description: Copy file(s) One location to another
location.
This
following message will show when user doesn’t true workerSupportsCancellation.
Step:1
User will declare a namespace for
Directory,that is called “System.IO”.
Step:2
User will declare for SorucePath and Designation path using string Data Type.
Step:3
Use Backgroundworker
nad One button in the Project
Step:4
Create a Two
Method for create Directory and Copy file(s) from One Directory to another
Directory.
Method Name:
CreateDirectory and assign a Parameter.
Method Desc:
Create Directory in the User Specified .Method also check whether Directory
exists.
Method Name: fileCopy
and assign two Parameter.
Method Desc: file(s)
Copy from One locaiton to another location.
Step:5
Backgroundworker_Dowork Event:
call fileCopy method.
Backgroundworker_RunWorkerCompleted
Event: To cancel backgrounderworker using Backgroundworker1.CancelAsync() method.
Step:6
Button1_Click
Event:Call Backgroundworker1.RunWorkerAsync() method.
How
it will Work?
Backgroundworker
will start when User Press “Button1”.
After file(s) Transfer Backgroundworker will
stop.
Note:
Before run application.Please follow this
step.
Go To Backgroundworker
Propoerty
Change WorkerSupportsCancellation
false to true.
Conclusion:
Thanks for reading this Article.I hope , It
will help you.Please send your comments and Feedback.