ASP.NET Ajax

Question

I have a custom control that has the following prototype.

Type.registerNamespace('Demo');
Demo.CustomTextBox = function(element) {
 Demo.CustomTextBox.initializeBase(this, [element]);
}
Demo.CustomTextBox.prototype = {
 initialize: function() {
 Demo.CustomTextBox.callBaseMethod(this, 'initialize');
 this._onblurHandler = Function.createDelegate(this, this._onBlur);
 $addHandlers(this.get_element(),
 {
 'blur': this._onBlur
 },
 this);
 },
 dispose: function() {
 $clearHandlers(this.get_element());
 Demo.CustomTextBox.callBaseMethod(this, 'dispose');
 },
 _onBlur: function(e) {
 if (this.get_element() && !this.get_element().disabled) {
 alert(this.get_element().value);
 }
 }
}
Demo.CustomTextBox.registerClass('Demo.CustomTextBox', Sys.UI.Control);
if (typeof (Sys) !== 'undefined') Sys.Application.notifyScriptLoaded();

How can i raise a post back event to the server in the _onBlur method?

Cheers

Rohan

• ahockley: Updating the question title to describe the question (instead of just ASP.NET Ajax) would probably gather more views/answers

Answer 1

You can use the __doPostBack method to do this, which has a signature of:

function __doPostBack(eventTarget, eventArgument)

So it would be something along the lines of:

__doPostBack(this.get_element().id, 0);

Or you can optionally pass an argument along with the event if desired.