This function is used to append files from one Fileupload control to another Fileupload control.
FileUploadname: Fileupload control Name from which files have to be appended.
FileUploadname: Fileupload control Name to which files have to be appended.
Fileindex (Optional): File index of file upload control from which files have to be appended.
We have two file upload control as in the figure below.
Upload files to both controls.
On button click, the files in the first file upload control will be appended to second file upload control,
The rule on button is shown below,
NOTE: Properties like allow multiple file and keep the file stream should be active for both file upload control.