[CLOSED] Close eventmask when file is downloaded using DirectEvent

[mwiater]

Hey Team,

I have query related to DirectEvent and using eventmask along with DirectEvents.

My controller action is returning the file which is generated using another function GenerateFile method which is returning the file path.

Public Function PdfDownload() As ActionResult
         Dim genFilePath = GenerateFile(FileExtension.PDF,  "templateFileName")
         Dim fileBytes As Byte() = System.IO.File.ReadAllBytes(genFilePath)
         Dim response = New FileContentResult(fileBytes, "application/octet-stream")
         response.FileDownloadName = System.IO.Path.GetFileName(genFilePath)
         Return response
End Function

View

@Html.X().Button().Text("Download").DirectEvents(Sub(ls)
ls.Click.EventMask.ShowMask = True
ls.Click.Url = Url.Action("BillingPdfDownload")
ls.Click.IsUpload = True
End Sub)

Issue is with EventMask, which never gets closed, because in this case result was never returned from action. Usually we put Me.Direct() and then eventmask gets to know that event is completed. But in our case I dont think we can put response anywhere inside Me.Direct() method as a result.


Anyone knows how to close the eventmask after file is being downloaded?

[fabricio.murta]

Hello @mwiater!

Unfortunately, that's not possible at all without maybe some third-party tools like, maybe using SWF objects.

The problem is because the web browsers do not interact back to the page in the event of a file download being completed. The best that can be done is remove the mask as soon as the file download is sent. In other words, immediately after the server replies with the file download handle, not before the client finishes the download.

If you search the forums you are going to find several other threads about this problem, possibly this one has good alternatives for you: How to show and Hide mask while saving file to local?

I hope this helps!

[mwiater]

Hi Fabricio,

Taking reference form given thread, I was able to close the eventmask when file is being downloaded.

Thanks.

[fabricio.murta]

Hello! Glad it was helpful! We would really appreciate if you shared which approach worked for you in your case. Could be useful for others in the future!