upload file not working in updatepanel

Question

I DONT WANNA GET MY PAGE TO BE GET REFRESH OR POSTBACK

So I am trying uploading file in updatepanel but onclicking upload button the valida

Answer 1

just add PostBackTrigger after for the FileUploader as below:

and add the below code in page load :

ScriptManager.GetCurrent(this).RegisterPostBackControl(FileUpload1);  

or if you want to make it async, you can use this :