How to do a Response.Redirect to another frame
One of the most often asked questions is:
Is it possible to do a Response.Redirect to another frame or a new window?
There is just one answer to this question: No, it isn't. Nope. No chance. No way. Never. Forget it.
Why isn't this possible?
It is not possible because of frames and windows are client-side concepts. The server just don't knows about these concepts. And if it does not know about it - how should it be able to address a different window or frame?
The workaround
The only possible workaround is the usage of JavaScript. Simply register a client-side script doing the desired redirect by using window.open or <parentframe>.location.href. Or use targets in your forms.