Hi,

 

You can try the UploadPersistedFile or UploadAttachments .

 

They can help you hode the file temporary, and then you can use it in other events.

 

for example , you put an UploadPersistedFile object ID=UploadPersistedFile1 :

 

void Button_Click(...)

{

    //if do not have uploaded a file

    if(UploadPersistedFile1.File==null)return;

 

    string folder = Server.MapPath("~/MyFiles");
    string savepath = System.IO.Path.Combine(folder, UploadPersistedFile1.File.FileName);

    UploadPersistedFile1.File.MoveTo(savepath);

    ProcessFlvFile(savepath);
}

 

Regards,

Terry