Keep programmatically created html controls after postback

Question

Hi,

I am adding HTML input controls on the page dynamically via a "add text box" button but after post back eventually they are being washed away. Is there an easy and good practice which can help me keep the controls and their values after page post back.

Thanks.

Edit :

• I am using Javascript to create dynamic controls on the page
• I am not dealing with File Uploads, just creating custom field things.

I think I need to override SaveViewState and LoadViewState events to keep my controls in the ViewState.

Answer 1

since you will receive them on post back, could you not recreate them dynamically at server-side ?

Answer 2

If the controls differ from postback to postbck depending on what the user enters then you can try storing the html ito a seperate class where you will have static properties like public static string WriteHTMLSubmit = ""

If not then hard code them in code behind, this being the bes practice... if(page.isPostBack){<write contrls>}

Answer 3

Keep the page! Use ajax to post the data, and a flash uploader if you are dealing with file uploads. Then the page never refreshes, and there is a lot less code to re-do the dynamically created controls.

Answer 4

See followings:
http://urenjoy.blogspot.com/2009/02/add-dynamic-buttons-and-handle-click.html
You need to override SaveViewState and LoadViewState methods to save after postback, See following sample
http://urenjoy.blogspot.com/2009/03/create-dynamic-dropdownlists-in-aspnet.html
and To retrieve value see following example:
http://urenjoy.blogspot.com/2009/02/retrieve-value-of-dynamic-controls-in.html