Question

Is there a difference between me using Javascript to redirect to URL + “?Querystring=value” versus using whatever mechanism ASP.NET uses?

If there is a difference, how can I make the rendered ASP.NET page be submitted to the same URL with a different query string by javascript?

Answer 1

If you want to do a post back just like a asp control like a asp:Button you can use the javascript functions included by the framework to do so:

__doPostBack('ControlIDOfEventYouWantToRaise','');

You can read more about the __doPostBack in this article:

Doing or Raising Postback using __doPostBack() function from Javascript in Asp.Net

Just doing a form.submit() will not be exactly the same as using __doPostBack.

To answer the first part of your question there is no difference doing a redirect if you are just doing a Response.Redirect as the will both do a GET. The difference is if you use a asp:Button control for instance, it will access your page first to handle the button (a post back) and then do a GET on the redirected page.

If you want to submit to the same URL (eg post your data) then you should use the __doPostBack method. If you don’t require the data to be posted, then just do a redirect in javascript to the same URL with a modified query string (which will just do a basic GET) but your data will not be posted.