"Back" button and ViewState

[Diffident]

Hello All,

Most of you might be familiar with this problem i.e, viewstate is lost
whenever we navigate from the one page to another. Does anyone have a remedy
for this problem?

On Page A, I have a datalist which has a "select" link for each row(I have
1000's of such rows). When a user clicks a particular select link, I am
redirecting him to Page B(this redirection is being done in
Datalist_ItemCommand). Once on Page B, when user clicks "Back" button in the
browser and clicks on another "Select" link, the datalist_ItemCommand is not
being fired. He is forced to click the "Select" link twice.

Does anyone for any alternatives for this problem?

Thanks!

[Naveen K Kohli]

When user clicks on "Back" button, the page is being served from the
browser's cache. The server does not get a chance to participate. You can
disable page caching on client by adding the required pragma settings in
headers. This should help.
"Diffident" <Di*******@discussions.microsoft.com> wrote in message
news:FB**********************************@microsof t.com...

Hello All,

Most of you might be familiar with this problem i.e, viewstate is lost
whenever we navigate from the one page to another. Does anyone have a
remedy
for this problem?

On Page A, I have a datalist which has a "select" link for each row(I have
1000's of such rows). When a user clicks a particular select link, I am
redirecting him to Page B(this redirection is being done in
Datalist_ItemCommand). Once on Page B, when user clicks "Back" button in
the
browser and clicks on another "Select" link, the datalist_ItemCommand is
not
being fired. He is forced to click the "Select" link twice.

Does anyone for any alternatives for this problem?

Thanks!

[Diffident]

Hello Naveen,

When I tried adding the following line of code:
Response.Cache.SetCacheability(HttpCacheability.No Cache);

to prevent the browser from caching the page. When I did this, I got this
error message in IE:

-----
Warning: Page has Expired The page you requested was created using
information you submitted in a form. This page is no longer available. As a
security precaution, Internet Explorer does not automatically resubmit your
information for you.

To resubmit your information and view this Web page, click the Refresh
button.
------

In Firefox, I am getting a "page cannot be displayed" error.

Any pointers?

Thank you.

"Naveen K Kohli" wrote:

When user clicks on "Back" button, the page is being served from the
browser's cache. The server does not get a chance to participate. You can
disable page caching on client by adding the required pragma settings in
headers. This should help.
"Diffident" <Di*******@discussions.microsoft.com> wrote in message
news:FB**********************************@microsof t.com...

Hello All,

Most of you might be familiar with this problem i.e, viewstate is lost
whenever we navigate from the one page to another. Does anyone have a
remedy
for this problem?

On Page A, I have a datalist which has a "select" link for each row(I have
1000's of such rows). When a user clicks a particular select link, I am
redirecting him to Page B(this redirection is being done in
Datalist_ItemCommand). Once on Page B, when user clicks "Back" button in
the
browser and clicks on another "Select" link, the datalist_ItemCommand is
not
being fired. He is forced to click the "Select" link twice.

Does anyone for any alternatives for this problem?

Thanks!

[Joerg Jooss]

Thus wrote Diffident,

Hello Naveen,

When I tried adding the following line of code:
Response.Cache.SetCacheability(HttpCacheability.No Cache);
to prevent the browser from caching the page. When I did this, I got
this error message in IE:

-----
Warning: Page has Expired The page you requested was created using
information you submitted in a form. This page is no longer available.
As a
security precaution, Internet Explorer does not automatically resubmit
your
information for you.
To resubmit your information and view this Web page, click the Refresh
button. ------

In Firefox, I am getting a "page cannot be displayed" error.

That's not an error. It's just a warning that going "back" means resending
previously submitted data again, which might be harmful if your web application
doesn't deal with such a case.

Cheers,
--
Joerg Jooss
ne********@joergjooss.de

[Diffident]

Joerg,

Do you know how I can disable this warning in IE?

Thanks!

"Joerg Jooss" wrote:

Thus wrote Diffident,

Hello Naveen,

When I tried adding the following line of code:
Response.Cache.SetCacheability(HttpCacheability.No Cache);
to prevent the browser from caching the page. When I did this, I got
this error message in IE:

-----
Warning: Page has Expired The page you requested was created using
information you submitted in a form. This page is no longer available.
As a
security precaution, Internet Explorer does not automatically resubmit
your
information for you.
To resubmit your information and view this Web page, click the Refresh
button. ------

In Firefox, I am getting a "page cannot be displayed" error.

That's not an error. It's just a warning that going "back" means resending
previously submitted data again, which might be harmful if your web application
doesn't deal with such a case.

Cheers,
--
Joerg Jooss
ne********@joergjooss.de

[Joerg Jooss]

Thus wrote Diffident,

Joerg,

Do you know how I can disable this warning in IE?

You cannot disable that warning. Instead, think about a server-side solution
to avoid that warning, like using Redirect-After-Post.

Cheers,
--
Joerg Jooss
ne********@joergjooss.de