What is PostBack and Callback
| One technique that current ASP.NET 1.0/1.1 developers use to overcome this postback problem is to use the Microsoft XMLHTTP ActiveX object to send requests to server-side methods from client-side JavaScript. In ASP.NET 2.0, this process has been simplified and encapsulated within the function known as the Callback Manager.
The ASP.NET 2.0 Callback Manager uses XMLHTTP behind the scenes to encapsulate the complexities in sending data to and from |
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| the servers and clients. And so, in order for the Callback Manager to work, you need a web browser that supports XMLHTTP. Microsoft Internet Explorer is, obviously, one of them. | |