There is a ComboBox along with Button inside Gridview. When user type any text in ComboBox and click on Button, then the searching related to key-in text starts and later bind to ComboBox.

Since the records in database is large, so it takes time to bind inside ComboBox on Button click.

During the loading on records in ComboBox on Button click, I want to change the Text of Button from "Search" to "Loading..."

after the data is bind in ComboBox, Button text shall change back to the old text "Search"

I want to implement this code at server side if possible.

Please let me know how to achieve it. Please reply