ActiveControls (AJAX)
+Active Controls allows the browser to communicate with server +without refreshing the current page. + +
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. + + +
- + TActiveCheckBox + represents a checkbox on a Web page. It can be used to collect two-state user input + and can trigger a callback request. + + +
- + TActiveCustomValidator + validates a particular control using a callback request. + + +
- + TActiveHyperLink + represents a hyperlink on a Web page. + + +
- + TActiveImage + represents an image on a Web page. + + +
- + TActiveImageButton + represents a click button that has an image as the background. + It is can be used to trigger a callback request. + + +
- + TActiveLabel + represents a label on a Web page. + The label can be customized via various CSS attributes. + + +
- + TActiveLinkButton + represents a hyperlink that can perform a callback request. + + +
- + 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. + + +
- + 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. + + +
- + 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. + + +
- + TCallbackOptions + callback options such as OnLoading client-side event handlers. + + +
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. + + +
- + 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. + + +
- + TActiveListBox + displays a list box that allows single or multiple selection. It can be used + to perform a callback request. + + +
- + 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. + +
Extended Active Controls
+ + +-
+
- + TAutoComplete + extends TActiveTextBox to offer text completion suggestions. + + +
- + TCallback + a generic control that can perform callback requests. + + +
- + TEventTriggeredCallback + triggers a callback request based on HTML DOM events. + + +
- + TInPlaceTextBox + represents a label that can be edited by clicked. + + +
- + TTimeTriggeredCallback + triggers a callback request based on time elapsed. + + +
- + TValueTriggeredCallback + monitors (using a timer) an attribute of an HTML element and triggers a callback request + when the attribute value changes. + + +
Active Control Abilities
+ + +| Control Name | +Can Update | +Triggers Callback | +Can Degrade | +
|---|---|---|---|
| + TActiveButton + | +Yes | Yes | Yes | +
| + TActiveCheckBox + | +Yes | Yes | Yes | +
| + TActiveCustomValidator + | +No | Yes | No | +
| + TActiveHyperLink + | +Yes | No | Yes | +
| + TActiveImage + | +Yes | No | Yes | +
| + TActiveImageButton + | +Yes | Yes | Yes | +
| + TActiveLabel + | +Yes | No | Yes | +
| + TActiveLinkButton + | +Yes | Yes | No | +
| + TActivePanel + | +Yes | No | Yes | +
| + TActiveRadioButton + | +Yes | Yes | Yes | +
| + TActiveTextBox + | +Yes | Yes | Yes | +
| + TCallbackOptions + | +No | No | N/A | +
| + TActiveCheckBoxList + | +Yes | Yes | Yes | +
| + TActiveDropDownList + | +Yes | Yes | Yes | +
| + TActiveListBox + | +Yes | Yes | Yes | +
| + TActiveRadioButtonList + | +Yes | Yes | Yes | +
| + TAutoComplete + | +Yes | Yes | Yes | +
| + TCallback + | +No | Yes | No | +
| + TEventTriggeredCallback + | +No | Yes | No | +
| + TInPlaceTextBox + | +Yes | Yes | No | +
| + TTimeTriggeredCallback + | +No | Yes | No | +
| + TValueTriggeredCallback + | +No | Yes | No | +
Active Control Infrastructure Classes
+The following classes provide the basic infrastructure classes required to +realize the active controls.
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+
- + TActiveControlAdapter + tracks the viewstate values of the control and update differences of the client-side HTML + element attributes. + + +
- + TActiveListControlAdapter + allows the adapted list controls to change the selections on the client-side during + a callback request. + + +
- + TActivePageAdapter + process the page life-cycle for callback requests. + + +
- + TBaseActiveControl + common active control methods and options. + + +
- + TCallbackClientScript + methods to manipulate the client-side HTML elements, also includes methods + to invoke javascript Effects on HTML elements. + + +
- + TCallbackClientSide + common client-side callback request options, and client-side event handlers. + + +
- + TCallbackResponseAdapter + HTTP response for callback requests. + + +
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