Is it possible to add a post post trigger to a control?
Programmatic addition of PostBackTrigger controls is not supported. If a control is set as a PostBackTrigger and AsyncPostBackTrigger control, an exception is thrown. Initializes a new instance of the PostBackTrigger class. Gets or sets the name of the control that is a PostBackTrigger control for an UpdatePanel control.
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What is a trigger for the asyncpost backtrigger class?
The Button control is specified as an asynchronous trigger for the UpdatePanel control. Use the AsyncPostBackTrigger control to allow controls to be triggers for an UpdatePanel control. Controls that trigger an update panel cause an update of the panel content after an asynchronous postback.
When to use postback function in ASP.NET?
The ASP.Net runtime will automatically insert the __doPostBack() function definition into the HTML output when there is a control that can initiate a postback on the page. To find this out, drag a LinkButton control onto the page and run the page.
How to handle postbacks from a popup control?
The PopupControl extender in the AJAX Control Toolkit provides an easy way to trigger a popup when any other control is activated. Special care must be taken when a postback occurs within such a popup. When using a PopupControl with a postback, an UpdatePanel can prevent the page refresh caused by the postback.
How to set postback trigger in Ajax UpdatePanel?
Our support team is here to help. Here Mudassar Ahmed Khan has explained how to configure AJAX UpdatePanel triggers i.e. PostBackTrigger or AsyncPostBackTrigger for Button or LinkButton placed in GridView inside AJAX UpdatePanel.
How to assign a postback trigger for link button in HTML?
Could not find a control with ID ‘Button1’ for the trigger on the UpdatePanel. The HTML markup consists of an ASP.Net GridView with 2 LinkButtons placed inside an AJAX UpdatePanel.
Why is postbacktrigger registered as an asynchronous event handler?
The Button control that calls the event handler to check the file name causes an asynchronous postback. However, the Button control that uploads the file is registered as a PostBackTrigger, because files cannot be uploaded asynchronously.