Is it possible to use ImageProperties.SavePropertiesAsync() to change Exif tags?

Hong 1,046

The following code to change an image file's orientation does not work for a UWP app:

ImageProperties imageProperties = await imageFile.Properties.GetImagePropertiesAsync();
List<KeyValuePair<string, object>> listProperties = new List<KeyValuePair<string, object>>();
listProperties.Add(new KeyValuePair<string, object>("Exif.Image.Orientation", 180));
await imageProperties.SavePropertiesAsync(listProperties);

It throws the exception: "The parameter is incorrect". Could anyone provide a tip on this?

Fay Wang - MSFT 5,196 Reputation points

2020-08-10T02:11:56.63+00:00

To access a larger set of file metadata, use the Windows Property System, a set of file metadata properties that can be retrieved with a unique string identifier. The windows property key for EXIF orientation is "System.Photo.Orientation", you could try to use it. Since properties that are unsupported may return a null value when retrieved, always check for null before using a returned metadata value. For more information about it, you could refer to this document.