Dataset all gone

[marcusmco]

I have used datasets in vb.net applications and now I am trying to do the same in asp.net.

On a web page I create a dataset and populate a few text boxes. When the user clicks a button and the page is posted back the dataset does not exist anymore (yes, I am new to asp.net). Is it correct that I have to create the dataset again when the page is posted back...?

 

[ca8msm]

Can you give an example of the code you are using?


____________________________________________________________
Mark,
[URL unfurl="true"]http://aspnetlibrary.com[/url]

Need help finding an answer? Try the Search Facility or read FAQ222-2244.

 

[jbenson001]

You have to repopulate the dataset each time the page loads.

 

[marcusmco]

Thanks. I was afraid that was the case.

 

[vbkris]

>>You have to repopulate the dataset each time the page loads.

or use Sessions, ViewState, Caching etc to maintain "state". but the concept is the same, once the page is rendered to the user ALL objects in that page expire...

Known is handfull, Unknown is worldfull

 

[jbenson001]

good point kris

 

[jshurst]

I think that you may be wanting something like this.

In the page_load event I'm assuming that you're filling your drop down lists with values from a dataset. But, you don't need to do this again on postback simply to maintain the items in your list. Just put your binding method inside the following:

If Not Page.IsPostback Then
'Your binding method
End If

These values will be saved in the viewstate and will stay in your list. It is true that the dataset itself won't exist, but that is a different situation. If you actually need the entire dataset then do what was mentioned above and go for caching.

J