| OnUploading(Byte, String, WriteMode) | Called when a byte-array is about to be uploaded. |
| OnUploading(Byte, String, Boolean) | |
| OnUploading(String, String, WriteMode) | Called when a file is about to be uploaded. |
| OnUploading(Stream, String, WriteMode, Int64) | Called when a stream is about to be uploaded. |
| OnUploading(Stream, String, Boolean, Int64) |