hi

are you using autopostback property in your dropdownlist.

post your code

 Give some more details , weather u used ajax in your project ?

1.yes i am using AutoPostBack=True for dropdownlists.

2.Yes i am using Ajax in my application.

hi

why you are using autopostback property. is there any need? if not make it false..

 hi

better use javascript instead. if i am not correct, post your code

chekuriraju:

When clicked on back button it will be redirected to a page normally,but when i change index of drop downlist in my page and then click on back button i get a eror saying page cannot be displayed.what could be the problem???

Hi chekuriraju,

Base on my understanding, it seems the the button is the browser's back button, if so, it is hard to control, it is the behavior of browsers, and it depend on browsers.

So I suggest you use the following two ways to instead of the back button:

1. Use Javascript, history.go(-1)

2. Use AJAX control, the History control.

Note:

History control is an AJAX control, see the introduction:

 

One problem faced by a typical AJAX application is that a partial page update is not added to the history of the Web browser. This means that the browser’s Back button does not move back one AJAX step, but moves back one entire document, which is unlikely to be what the user expects. The ASP.NET AJAX History control allows the developer to insert history points so that the user may click the browser’s Back and Forward buttons to move between AJAX steps. 

 

To know more, please visit this link: http://www.asp.net/learn/ajax-videos/video-149.aspx

PS:

1.You need to install AJAXControlTookit in your computer if you want to use AJAX control, please check out this link to download the toolkit: http://www.codeplex.com/AtlasControlToolkit/Release/ProjectReleases.aspx?ReleaseId=8513


2.Please check out this video if you do not know how to install AJAXControlTookit: http://download.microsoft.com/download/9/d/8/9d8a3ff9-e520-4c69-a7a0-aad7a3dc596d/HDI-02-GetStarted-AJAX-Toolkit.wmv

Hope it helps,

Hong Gang

i have followed your link and downloaded and tried to use it in my application  but i am not able to fire History1_Navigate event.where as i have tried a given example BrowserHistoryCS which is working fine...

i am giving the error message for the original post....

I have couple of drop down lists....the results are in a postback pager...i am able to page....but when i click on browser back button i get the following error and also when the click on Back button in the error page it goes to the correct page.......

I am stuck with the above problem.Help me out!!