Link to home
Start Free TrialLog in
Avatar of Lawrence Avery
Lawrence AveryFlag for United States of America

asked on

ASP.NET Postback process

What controls can cause a PostBack for an ASP.NET Page? And do these control(s) have the AutoPostback property?
What events associated with a control can cause a PostBack?
Avatar of OriNetworks
OriNetworks

Just about any control that the user can interact with will usually cause a postback if an event is wired to that control including invisible controls and custom controls. It is also possible to initiate a postback with javascript on behalf of a control. Not all controls support the AutoPostback property. You can view a list of .net WebControls at http://msdn.microsoft.com/en-us/library/System.Web.UI.WebControls(v=vs.110).aspxhttp://msdn.microsoft.com/en-us/library/System.Web.UI.WebControls(v=vs.110).aspx
Avatar of Lawrence Avery

ASKER

I just noticed there is no AutoPostBack property listed when you select a button control properties.
However, I see UseSubmitBehavior property on a button control which submits no matter if the property is False or True.
So apparently all buttons cause submit. There also must be a way to prevent a button from submitting to the server and
use the client side code. (jQuery)

See article on usesubmitbehavior
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.button.usesubmitbehavior(v=vs.110).aspx

This article below talks about the AutoPostBack property
http://www.c-sharpcorner.com/uploadfile/2f73dd/what-is-postback-in-Asp-Net/
UseSubmitBehavior will still postback to the server but controls if it acts as a form submit button. to prevent a .net button from causing a postback you can use the OnClientClick property
OnClientClick="return false;"

Open in new window


Is there something specific you were trying to accomplish that still is not working?
The OnClientClick property --- I do not see that property listed in the properties window when I select the button control.
Why is that?
ASKER CERTIFIED SOLUTION
Avatar of OriNetworks
OriNetworks

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Ok I did find the OnClientClick property. So that answers that.  You have indicated if there is an event handler tied to that
control, you will be able to postback.  
However, that would require the AutoPostBack property of that control to be set to True, correct?
If you set the control's AutoPostBAck property to False, then the control would not cause a postback  even though
you tied an event handler to it, correct?