One thing you need is the FilesSelected
event. Please handle it and you will get the control over newly selected files. There are some more events that will help you deal with file related restrictions: FileTooLarge
About deletion of an already selected item.
Use the RadUpload.CurrentSession.FileNameUploadItem
to get the related RadUploadItem
and then delete it from the RadUpload control:
| RadUploadItem item = this.radUpload.CurrentSession.FileNameUploadItem[FileName];
We hope this information will help you to accomplish your task. Of course if you have more questions please do not hesitate to contact us.
All the best,
the Telerik team