Vb.net create a temp file

I need to generate a unique temporary file with a. Replace ". Brann Brann To resolve this error, delete all unneeded temporary files. Temporary files are mainly uses for a specific set of conditions. If the file extension is important, I wonder if maybe using the GetTempFileName isn't the write solution. I know it's been a long time, but if you told us more about the context and need for these files, we might be able to suggest a better approach altogether.

Keep in mind GetTempFileName creates a new file each time you call it. Add a comment. Active Oldest Votes. Mitch Wheat Mitch Wheat k 42 42 gold badges silver badges bronze badges.

But not guaranteed to be in a writable location — JaredPar. And they are not guaranteed to be unique at all, just statistically unlikely. Pax: you have more chnace of winning the lottery times in a row than generating two idebtical guids. That's unique enough I guess Mitch the reason it's not unique is because it's possible for me to simply create a file with the same name in the same path. GUIDs while guaranteed to be unique are also predictable which means given enough information I could guess the next set of guids generated by your box — JaredPar.

The approach is: generate a random file name, then create it if it doesn't exist. So just help him code that nicely. All this talk about pseudo-random generators and universally unique numbers is totally unnecessary. Show 22 more comments. Try this function JaredPar JaredPar k gold badges silver badges bronze badges. Perhaps Path.

ChangeExtension would be more elegant than Guid. I suppose that depends on the contract of the method whether it expects. Combine Path. Maxence Maxence Keep in mind that Path. GetRandomFileName actually creates a zero-byte file on disk and returns the full path of that file. You are not using this file, only its name to change the extension.

So, if you don't make sure that you are deleting these temporary files, after calls to this function it will begin to fail. Your link points to the wrong page. AddExtension "txt", true ; File. WriteAllText Path. Combine tempDirectory,filename ,"Hello World" ; Here I used a txt extension but you can specify whatever you want.

Mehmet Aras Mehmet Aras 5, 1 1 gold badge 23 23 silver badges 31 31 bronze badges. Why not checking if the file exists? Exists fileName ;. Tute Tute 6, 12 12 gold badges 48 48 silver badges 60 60 bronze badges. Exists tells you information about the past and is hence not reliable. In between the return of File. Exist and your code executing it's possible for the file to be created. Hi dude, That's really good to see the example like this.

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Developer Fusion - The global developer community for. NET and Java programmers. The temporary file is created within the user's temporary folder, which is the path returned by the GetTempPath method. The GetTempFileName method will raise an IOException if it is used to create more than files without deleting previous temporary files. To resolve this error, delete all unneeded temporary files. Skip to main content.

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