How to inject Javascript from code behind when back button is clicked? (asp.net)

Question

How to inject JS code when browser's button is clicked? I noticed that RegisterStartupScript during that page life cycle doesn't inject any JS code.

OR

How to force any browser to not use the cache and do a fresh complete page load when back button is used?

Answer 1

您可以检查引荐网址（通过Request对象或HTTP Server变量）以查看它是否来自Page Load事件中的特定页面，然后从那里加载您的JavaScript。

Answer 2

I think that depends on what you have that is being cached... for example, in a project I had IE caching images, and no matter if you pressed the back button or refresh the page, the image won't be refreshed. So the solution was to add a querystring to the img source with a timestamp.

Hope it helps.

Answer 3

Try adding the following line to the Page Load event. The page will not be cached and will be reloaded, not retreived from the cache.

Response.Cache.SetCacheability(HttpCacheability.NoCache);

Answer 4

我认为您希望将HttpCachePolicy设置如下：

Response.Cache.SetCacheability(HttpCacheability.NoCache);