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Why it doesn't work?Dim img As New ImageButton
Page.Controls.Add(img) It works with Image but ImageButton gives this error: Control '1' of type 'ImageButton' must be placed inside a form tag with runat=server. What's wrong??? Thanks Ufi ASP.NET follows the single form model therefore your imagebutton would
need to be added to a form which in turn is added to a page. Normally the form is statically declared on a page (normally called "form1") and the dynamically created controls would be added to the statically declared form. 'Assume a form of ID "form1" is already statically decalred on a page. Dim img As New ImageButton form1.Controls.Add(img) Ufit wrote: Show quoteHide quote > Dim img As New ImageButton > Page.Controls.Add(img) > > It works with Image but ImageButton gives this error: > Control '1' of type 'ImageButton' must be placed inside a form tag with runat=server. > > What's wrong??? > > > Thanks > > Ufi Ok I got it but still when I add controls to form and f.ex. click on some button
my controls (UserControl) get destroyed. Why is that? form1 is getting destroyed and reloaded as a new instance It looks like it's not static so how to make it static? Thanks ufi Show quoteHide quote <CaffieneR***@gmail.com> wrote in message news:1151796175.334010.152480@h44g2000cwa.googlegroups.com... > ASP.NET follows the single form model therefore your imagebutton would > need to be added to a form which in turn is added to a page. > Normally the form is statically declared on a page (normally called > "form1") and the dynamically created controls would be added to the > statically declared form. > > 'Assume a form of ID "form1" is already statically decalred on a page. > Dim img As New ImageButton > form1.Controls.Add(img) > > Yes, all controls gets destroyed after every response because of the
stateless nature of http. The trick is to recreate it again on the next request. If you've declaratively added your controls to the page then the ASP.NET framework would automatically recreate your controls on each postback and make it look like the controls were never destroyed. Else if you are programmatically adding your controls then you have to programmatically add the controls back on each postback. To handle an event (eg.click) from a dynamically created control, you need to first recreate the control (such as during page_load) otherwise the event handler would never be called. Andy Ufit wrote: Show quoteHide quote > Ok I got it but still when I add controls to form and f.ex. click on some button > my controls (UserControl) get destroyed. Why is that? > form1 is getting destroyed and reloaded as a new instance > It looks like it's not static so how to make it static? > Thanks > > ufi > > <CaffieneR***@gmail.com> wrote in message news:1151796175.334010.152480@h44g2000cwa.googlegroups.com... > > ASP.NET follows the single form model therefore your imagebutton would > > need to be added to a form which in turn is added to a page. > > Normally the form is statically declared on a page (normally called > > "form1") and the dynamically created controls would be added to the > > statically declared form. > > > > 'Assume a form of ID "form1" is already statically decalred on a page. > > Dim img As New ImageButton > > form1.Controls.Add(img) > > > > 
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