vb.net - Displaying progress while uploading data -

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i using following code located here upload files

public function uploadfile(byval ofile fileinfo) boolean dim ftprequest ftpwebrequest dim ftpresponse ftpwebresponse try ftprequest = ctype(ftpwebrequest.create(ftpsite + currentdirectory + ofile.name), _     ftpwebrequest) ftprequest.method = webrequestmethods.ftp.uploadfile ftprequest.proxy = nothing ftprequest.usebinary = true ftprequest.credentials = new networkcredential(username, password) ftprequest.keepalive = keepalive ftprequest.enablessl = usessl if usessl servicepointmanager.servercertificatevalidationcallback = _     new remotecertificatevalidationcallback(addressof validateservercertificate) dim filecontents(ofile.length) byte using fr filestream = ofile.openread fr.read(filecontents, 0, convert.toint32(ofile.length)) end using using writer stream = ftprequest.getrequeststream writer.write(filecontents, 0, filecontents.length) end using ftpresponse = ctype(ftprequest.getresponse, ftpwebresponse) ftpresponse.close() ftprequest = nothing return true catch ex webexception return false end try end function

i extend it, can have upload progress too. problem not know start. "logic" of displaying upload progress?

"split file" in predefined parts , upload them or what?

you need execute upload request on background thread avoid blocking ui thread. easiest way using backgroundworker class. it's designed situations this.

    dim backgroundworker new system.componentmodel.backgroundworker()     backgroundworker.workerreportsprogress = true     backgroundworker.workersupportscancellation = true     addhandler backgroundworker.dowork, addressof me.backgroundfiledownload     addhandler backgroundworker.progresschanged, addressof me.progresschanged     addhandler backgroundworker.runworkercompleted, addressof me.jobcompleted

the events progresschanged , runworkercompleted run on ui thread, , allow update progress bar accordingly current download's status. they'll this:

protected sub progresschanged(byval sender object, byval e progresschangedeventargs)         progressbar.value = e.progresspercentage end sub

dowork called on background thread, , want call uploadfile() function you've written. ftpwebrequest, you're going want first file's size, upload blocks of data, divide you've uploaded far file's full size percentage complete. like

worker.reportprogress(math.round((_bytesuploaded / _filesize) * 100))

hope helps.


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