| -api-id | -api-type |
|---|---|
M:Windows.Storage.StorageFile.CreateStreamedFileAsync(System.String,Windows.Storage.StreamedFileDataRequestedHandler,Windows.Storage.Streams.IRandomAccessStreamReference) |
winrt method |
Creates a StorageFile to represent the specified stream of data. This method lets the app produce the data on-demand by specifying a function to be invoked when the StorageFile that represents the stream is first accessed.
The user-friendly name of the StorageFile to create, including a file type extension.
The function that should be invoked when the StorageFile that is returned is first accessed. This function should produce the data stream represented by the returned StorageFile and lets the app produce data on-demand instead of writing the contents of the file at creation time.
The thumbnail image for the StorageFile to create.
For a high-quality thumbnail, one edge of this thumbnail should be at least 1024 pixels.
When this method completes, it returns a StorageFile object that represents the new stream of data.
Both this method and CreateStreamedFileFromUriAsync can be used to create a StorageFile that can be passed to other methods or passed to another app through app contracts.
These methods let you defer expensive operations to produce the data until that data needed (when it is first accessed). This avoids creating unnecessary delays in user interaction while the data is produced.