Delete image from RichEditBox

Question

I'm inserting an image from a URL into a RichEditBox like so:

// Create a MemoryStream from uri, and insert into richeditbox
System.IO.Stream stream = await new HttpClient().GetStreamAsync("some url");
var memoryStream = new MemoryStream();
await stream.CopyToAsync(memoryStream);
memoryStream.Position = 0;
this.richEditBox.Document.Selection.InsertImage(40, 40, 0, Windows.UI.Text.VerticalCharacterAlignment.Baseline, "image", memoryStream.AsRandomAccessStream());

Which works fine, but I can't delete (using the onscreen keyboard) the image when pressing backspace!

Anyone have any ideas?

Answer 1

Found it! The answer was simple - just needed to set Selection.StartPosition

this.richEditBox.Document.Selection.StartPosition--;
this.richEditBox.Document.Selection.Delete(Windows.UI.Text.TextRangeUnit.Object, 1);

StartPosition is set to EndPosition for Document.Selection by default, so trying to delete was just doing nothing (since nothing was selected).

Note: Override KeyDown event of RichEditBox and add the above to VirtualKey.Back key press to get desired results from the onscreen keyboard!