Get IStorageFolder for FilePickerSaveOptions.SuggestedStartLocation

[CYLMos]

Now I want to save a file and open a save dialog to save it.

And I want to specify the default folder for this save dialog but I have no idea to create a IStorageFolder object and assign it to SuggestedStartLocation

Thanks!

[maxkatz6]

In current builds you need to ask user to pick the folder first. You also can save previously picked folder to bookmarks and serialize it.
But it is planned to add couple of additional helper methods. Primarily to be able to open well known folders (pictures, documents, downloads...) without asking it first.

[CYLMos]

@maxkatz6 "In current builds you need to ask user to pick the folder first." <-- I don't understand this part.
If the folder location is decided by me, not user, is it possible that I use a absolute path to get IStorageFolder?

Like the obsolete method:
var dialog = new SaveFileDialog { InitialFileName = "File.json", Directory = "My Path", DefaultExtension = "json" };

[AscendLiu]

Hello, how did you solve it

[maxkatz6]

@AscendLiu
StorageProvider has TryGetFolderFromPathAsync method now. You can use it.
But even better you can use TryGetWellKnownFolderAsync method, if you need one of pre-defined user folders, like Downloads.

[AscendLiu]

I don't quite understand why it's recommended to use TryGetWellKnownFolderAsync, even though it's more common to use opening a specified path to select files and often requires attaching FilePickerOpenOptions. Finally I use the OpenFilePickerAsync