UpdatePanel Bug (June 2006 CTP)

In order for this to work, the client has to be able to find Panel1. You can't use the Visible property because then only the server knows about Panel1. Instead, you can use the CSS Display attribute.

rchern13:

In order for this to work, the client has to be able to find Panel1. You can't use the Visible property because then only the server knows about Panel1. Instead, you can use the CSS Display attribute.

Your way is not security for protecting personal published information from being modified by the one who has no permission to do that.

As he said, if the updatepanel doesn't exist on the client side it cannot be updated.
Maybe you could put a panel in the updatepanel and on the Button2 Click you make
this panel visible ...