[Ajax Notes] updatepanel control Introduction

The updatepanel control allows you to build a wide range of applications similar to clients.Program. By applying the updatepanel control, you can perform partial update for page callbacks without updating the entire page. This is the partial update of the reference page. referencing a scriptmanager control and one or more updatepanel controls on the page allows you to update the entire page without any script.

Updatepanel is a server-side control that helps us develop our pages with complex client behavior, making our pages more user-friendly. Some updates on the client and server often require complicated JavaScript support. However, with the updatepanel control, you can implement this function without writing a line of JS. If you want to, you can add custom scripts to improve the user experience of the client. Updatepanel has no browser dependency (compatible with all browsers) and can reduce the amount of data transmitted between the server and the client.

Of course, to achieve that effect, we need to have another server control to collaborate. Because no matter what Ajax is dependent on the asynchronous callback of the script, scriptmanager is essential, it can reference the script library used in Ajax. When a partial page update is activated, the updatepanel control can send data asynchronously to the server. When the server returns the callback result after processing. webforms. the pagerequestmanager class will execute the Dom to operate the updated HTML and replace the result with the existing HTML.