Please note that we set the style of the Link Button to "display:none" rather than set its Visibile property to false, otherwise the Link Button won't be rendered on the page, which will cause an exception when postback: .Link Button1); Now we can simply call the raise Async Post Back method defined in the page when we want to raise an async postback using Java Script code.For that reason, you may specify a minimum amount of time to occur before showing the progress control. Specify a number of milliseconds to elapse before showing the progress control, e.g. NET  Chart  Grid View  AJAX  JQuery  Google chart  Fusion Charts  i Text Sharp  PDF  ASP.HOME Accordion Ajax File Upload Always Visible Control Animation Area Chart Async File Upload Auto Complete Balloon Popup Bar Chart Bubble Chart Calendar Cascading Drop Down Collapsible Panel Color Picker Combo Box Confirm Button Drag Panel Drop Down Drop Shadow Dynamic Populate Filtered Text Box Gravatar Hover Menu Html Editor Extender Line Chart List Search Masked Edit Modal Popup Multi Handle Slider Mutually Exclusive Check Box No Bot Numeric Up Down Paging Bulleted List Password Strength Pie Chart Popup Control Rating Reorder List Resizable Control Rounded Corners Seadragon Slider Slide Show Tabs Text Box Watermark Toggle Button Twitter Update Panel Animation Validator Callout Update Panel Animation Extender is an extender that allows you to play animations both while an Update Panel is updating and after its update is finished.
At first, we should build a page with an Update Panel and a invisible Link Button in it.Both the client and server will think the Link Button is clicked.The client side will raise an async postback and the server will fire the Click event of the Link Button.An Update Panel will be refreshed if the user clicks the specific control in the page and the control is the trigger that raises the async postback. NET rather than the concept in HTML since the server side konws ASP. They are Butto A Link Button on server side generates an anchor tag on the page.The straightest thought of raising an async postback is to simulate a button's clicking. The way to submit the form when click the anchor is to execute the Java Script method "__do Post Back".