Dear viewers hear I will show how to use ASP.NET AJAX Calender Extender with a textbox. This Calender Extender pass date time value to the textbox so that it can be saved database date time field. I have also used a calendar image to clearly view so you need to take an image control and calneder image icon. It can be said very useful as a cliendside easily display. At first we need to take a text box then take image control and assign calendar icon to the image control . Now add AJAX CalendarExtender tag to the page