Wish File.Copy - FileCopy_Completed event

LucaMs

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• Jul 8, 2017

• #1

I wrote 3 consecutive lines to copy 3 files from Assets to DirDefaultExternal.
Then I tried to send those files using FTP; for the second and third file I got a "no such file or directory found" message.

Investigating I found that second and third copy failed, without exceptions.
Adding Sleep(2000) after each copy line, the project works.

It would be "nice" to have a Copy_Completed event or, at least, an exception - error message.

(If that 2 seconds pause was not enough or was excessive?)

 

Erel

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• Jul 9, 2017

• #2

File.Copy is a synchronous method. The file should be there immediately after the command is executed.
I never encountered an issue such as the one described.

Are you using File.Copy2? Are you closing the output stream?

 

LucaMs

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• Jul 9, 2017

• #3

Erel said:

Are you using File.Copy2? Are you closing the output stream?

Click to expand...

No, three simple File.Copy (Activity_Create):

B4X:

File.Copy(File.DirAssets, "FileToSend1.txt", File.DirDefaultExternal, "FileToSend1.txt")
Sleep(2000)
File.Copy(File.DirAssets, "FileToSend2.txt", File.DirDefaultExternal, "FileToSend2.txt")
Sleep(2000)
File.Copy(File.DirAssets, "FileToSend3.txt", File.DirDefaultExternal, "FileToSend3.txt")
Sleep(2000)

It was and old FTP test project, so there are only other lines releated to FTP (initialization, make dir, upload file, list file), nothing else.

The three files are almost empy text files.

 

Star-Dust

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• Jul 9, 2017

• #4

It also happened to me.
I solved that, otherwise you report error "file not found"

B4X:

File.Copy(File.DirAssets,NameFile,File.DirInternal,NameFile)
DelaySub(300)
WebView1.LoadHtml(File.ReadString(File.DirInternal,FileName))

On delay sub, i use DoEvents (deprecated) for generate a wait

 

LucaMs

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• Jul 9, 2017

• #5

I launched the project again without sleep, and now it works!
I really do not know why !!!

 

Star-Dust

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• Jul 9, 2017

• #6

Some files gave me this mistake no more. But it does not depend on the lenght of file in my case. It's really weird.

For security, not knowing which files could generate the error I paused before on each reading

 

LucaMs

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Longtime User

• Jul 9, 2017

• #7

LucaMs said:

I really do not know why !!!

Click to expand...

I tried to change the project package name, to be sure that can not be caches but it still works; I'm pretty sure that Erel scared it

 

Erel

B4X founder

Staff member

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• Jul 9, 2017

• #8

LucaMs said:

I'm pretty sure that Erel scared it

Click to expand...

It does happen from time to time.