How To Change the file name after uploading the file in radeditor

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RadEditor

hello

i have radEditor in web Project.

i click to image manager in radEditor and upload file by Upload Botton. example my file is "MyFile.jpg". my file save in server path whit name "MyFile.jpg".

i want to Change filename after upload in server and save it. i write FileUpload event :

public bool RadEditor1_FileUpload(object sender, string fileName)

{

string FileNameTemp = fileName.Substring(fileName.LastIndexOf("/") + 1);


string strExtension = System.IO.Path.GetExtension(FileNameTemp);

FileNameTemp = FileNameTemp +
"-" + Guid.NewGuid() + strExtension;

fileName = fileName.Substring(0, fileName.LastIndexOf(
"/") + 1) + FileNameTemp;


return true;

}



please help me.
but file save yet whit name "MyFile.jpg".