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Comment by mtVessel | Hacker News Reader

This thread confuses me, possibly because I'm not a UWP dev. OP keeps talking about the FileSavePicker being defective, but isn't that just a control? Isn't the actual writing being done by the FileIO classes? And doesn't it just boil down to someone using them wrong?

In the System.IO namespace we can explicitly specify a FileMode to indicate whether we're appending or overwriting. If the UWP equivalent doesn't exist (and you need to explicitly set the file length to 0 to truncate), why would anyone just assume it does one or the other?

"The API is crap" is still not an excuse for using it wrong. Am I missing something?

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yeah it's horseshit. The picker just let's you pick a file path.

The Win32 API also requires you to specify that you want to truncate the existing files.

How the fuck else would it work ? An additional OpenFileButTruncateExisting() API ?

A SaveFileAndOverwriteExisting() API ?

You can argue for those, but this thread is idiotic. He tries to furiously backpedal towards the end, but if he doesn't know the difference between a picker dialog and actually writing a file, I am not sure why I'd pay him any attention.

Not only is the API called `FileSavePicker.PickSaveFileAsync` which any reasonable person would assume would give you a truncated file, but even Microsoft agrees that it should give you a truncated file.

https://news.ycombinator.com/item?id=35277561

`FileSavePicker.PickSaveFileAsync` manages to be redundant and ambiguous at the same time. Definitely wouldn't want to guess what that might do.

Sorry, my "reasonable" interpretation of the name tells me that it's a method to choose the file you want to save. It suggests absolutely nothing about actually writing data.

Now continue reading the rest of the sentence.

you are right. so it is the savefileandoverwriteexisting() api, with a bug. I stand corrected.

I was also wondering along the same lines as an everything except for windows developer so it’s not just you. It would be good if someone could clarify.

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