Active Controls (AJAX enabled Controls)
Active controls extends standard PRADO controls adding the ability to automatically update themselves on callbacks without the need of ad-hoc javascript calls. See the Introduction
for a quick overview of the concept behind active controls (AJAX enabled controls).
For a quick demo of active controls, try the
TActiveButton control. See also the later part of the Currency Converter tutorial for a more in depth example.
Standard Active Controls
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TActiveButton
represents a click button on a Web page. It can be used to trigger a callback request.
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TActiveCheckBox
represents a checkbox on a Web page. It can be used to collect two-state user input
and can trigger a callback request.
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TActiveCustomValidator
validates a particular control using a callback request.
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TActiveDatePicker
adds a date picker that permits the suer to choose a date.
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TActiveFileUpload
displays a file upload field on a page and uses an iframe to permit handling of the
file upload in a callback.
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TActiveHiddenField
displays a hidden input field that can be changed upon callback.
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TActiveHyperLink
represents a hyperlink on a Web page.
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TActiveImage
represents an image on a Web page.
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TActiveImageButton
represents a click button that has an image as the background.
It is can be used to trigger a callback request.
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TActiveLabel
represents a label on a Web page.
The label can be customized via various CSS attributes.
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TActiveLinkButton
represents a hyperlink that can perform a callback request.
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TActiveMultiView
represents a container for a group of TView controls, each of which is container for other controls.
At any time, at most one TView is visible. It's the active counterpart of TMultiView.
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TActivePanel
represents a container for other controls on a Web page. In HTML,
it is displayed as a <div> element. The panel's contents
can be replaced during a callback request.
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TActivePager
generates UI that allows users to interactively specify which page of
data to be displayed in a data-bound control.
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TActiveRadioButton
represents a radiobutton on a Web page.
It is mainly used in a group from which users make a choice. It can
be used to perform a callback request.
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TActiveTextBox
represents a text input field on a Web page.
It can collect single-line, multi-line or password text input from users.
It can be used to perform a callback request.
Active List Controls
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TActiveCheckBoxList
displays a list of checkboxes on a Web page and each checkbox
can trigger a callback request.
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TActiveDropDownList
displays a dropdown list box that allows users to select a
single option from a few prespecified ones. It can be used
to perform a callback request.
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TActiveListBox
displays a list box that allows single or multiple selection. It can be used
to perform a callback request.
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TActiveRadioButtonList
is similar to TActiveCheckBoxList in every aspect except that each
TActiveRadioButtonList displays a group of radiobuttons. Each radio button
can perform a callback request.
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TActiveRatingList
is an EXPERIMENTAL class that displays clickable images that represent a TRadioButtonList.
Active Data Controls
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TActiveDataList
is used to display or modify a list of data items. It is the
active counterpart to the original TDataList control.
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TActiveDataGrid
displays data in a tabular format with rows and columns. It is the
active counterpart to the original TDataGrid control.
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TActiveRepeater
displays its content defined in templates repeatedly based on the given data.
It is the active counterpart to the original TRepeater control.
Extended Active Controls
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TAutoComplete
extends TActiveTextBox to offer text completion suggestions.
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TCallback
a generic control that can perform callback requests.
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TEventTriggeredCallback
triggers a callback request based on HTML DOM events.
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TInPlaceTextBox
represents a label that can be edited by clicked.
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TTimeTriggeredCallback
triggers a callback request based on time elapsed.
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TValueTriggeredCallback
monitors (using a timer) an attribute of an HTML element and triggers a callback request
when the attribute value changes.
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TDropContainer & TDraggable represents drag and drop containers.
The former will make its child controls "draggable" while the latter will raise a callback when a draggable
control is dropped on it.
Active Control Abilities
The following table shows the Active Controls that can trigger a
callback event and whether the control will raise a PostBack event
if Javascript was disabled on the client's browser.