Page Expiration

[davidseye]

Can anyone give me some pointers?

In an aspx page, I want to make it so a user cannot access a certain page where some data has been entered in a form a second time by using the browser's back button so duplicate submissions are not accidentally written to the db. I have it so that when a new instance of the form in invoked in the page all the fields are cleared of their view state information, but I can't seem to control it when it is recalled from the back button.

Can anyone give me some guidance with this, please.

[bruce]

Insert a no-cache meta tag to your header

<meta http-equiv="pragma" content="no-cache"></meta>


[b]quote:Originally posted by davidseye

Can anyone give me some pointers?

In an aspx page, I want to make it so a user cannot access a certain page where some data has been entered in a form a second time by using the browser's back button so duplicate submissions are not accidentally written to the db. I have it so that when a new instance of the form in invoked in the page all the fields are cleared of their view state information, but I can't seem to control it when it is recalled from the back button.

Can anyone give me some guidance with this, please.
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[davidseye]

Yeah, that's what I thought too. But it didn't work. I didn't have a closing meta tag so I thought that would make a difference, but it didn't. It just doesn't seem to do the trick. I thought .NET might hav some special way. Oh well. I have bigger fish to fry today. I will worry about it tomorrow. Thanks, Bruce, for responding.

[bruce]

Try put this in your page_load sub

Response.Expires = 60
Response.ExpiresAbsolute = CDate("07/29/1977")
Response.AddHeader("pragma", "no-cache")
Response.AddHeader("cache-control", "private")
Response.CacheControl = "no-cache"



[b]quote:Originally posted by davidseye

Yeah, that's what I thought too. But it didn't work. I didn't have a closing meta tag so I thought that would make a difference, but it didn't. It just doesn't seem to do the trick. I thought .NET might hav some special way. Oh well. I have bigger fish to fry today. I will worry about it tomorrow. Thanks, Bruce, for responding.
</blockquote id="quote"></font id="quote">

[davidseye]

I finally got back to that page I was trying to expire. I put the code you suggested. It worked like a charm. Thanks for your help.