ASP.NET validation controls are removing client event handlers.

You may use them every day, but how much do you really know about events? What's going on when you add an event handler to a class? In this article, Ken Getz demonstrates various ways to interact with events and event handlers, and shows how they can solve common problems. Along with the article, you can download two sample applications (one for Visual Basic .NET 2002 and 2003 and one for Visual Basic 2005) and follow along.

Ken Getz

MSDN Magazine June 2005

Sometimes the extra controls that come with Visual Studio .NET can be a bit inflexible or they just don't provide enough functionality or flexibility for all situations. The ASP.NET form validation controls, while powerful and easy to use, require that the entire page be valid before it's submitted back to the server. Through the use of the new object-oriented features of Visual Basic .NET, it is possible to extend their functionality to overcome this limitation. This article tells you how and helps you decide when it's a good idea to keep validation on the client and when you'd be better off disabling it.

James M. Venglarik II

MSDN Magazine April 2002

In the past, Web developers often used ActiveX controls if they wanted customized client-side functionality incorporated into their Web applications. Now, they can build objects supported by the Microsoft .NET Framework which are more compact, lightweight, secure, and seamlessly integrated. By hosting .NET Windows Forms controls in Internet Explorer, developers can realize many of their client-side Web development goals. This article adapts ActiveX concepts for use with Windows Forms, and builds a multifile upload application that demonstrates these techniques.

Jay Allen

MSDN Magazine January 2002

I have been trying both MicrosoftMvcJQueryValidation.js and MicrosoftMvcValidation.js.

The former does not support validation summarie, while the latter does.

Neither one of them seems to be able to deal with System.ComponentModel.DataAnnotations.DataType markings on the client side. It somewhat defeats the purpose of having the attributes on the server side. I know the validation on the server side works, but I need it to work on the client too.

Is there an easy way to make the client side validation for that work?

Are there any updates to these javascript libraries that I am may not be aware of?

I have a Ajax Accordion control on my page with treeview in Content Template. As the treeview for each pane are big. I am wondering whether I can load the treeview from codebehind only after the pane is selected. I can reuse the code from ItemDataBound of Accordion control.

Ok, here is my senario.

A random (6-15) amount of textboxes are generated. Each textbox represents only one character. From those textboxes, three of them (at a random position) are enabled and the rest disabled.

Problem:

When I put a character in any enabled textbox, it must put the focus on the next enabled textbox.

Notes:

Textbox IDs go from 'char0' to 'char15' OR 'char0' to 'char12' OR ...

All the textboxes are generated so I can't set up specific focus events for each textbox because the designated control is unknown at design time.

Here is my attempt:

page.aspx

<script type="text/javascript">
    function abc(nextfocus)
    {
            document.getElementById(nextfocus).focus();
    }
</script>

for (int i = 0; i < focusableControls.Length-1; i++)
{
focusableControls[i].ClientSideEvents.KeyDown = "abc(" + focusableControls[i + 1].ID + ")";
}

focusableControls is an array with all the textboxes in that can get focus. It is also in the right order.

Things I want to find out:

How will I send the textbox out of focus

I wonder what are these empty event handlers that swarm in Task Lists with IDs 32767 ?

I think they can be a reason why my Announcements dont work from such lists. And wf dont autostart also (autostart on creation).

Using VS2005 (.NET 2.0), VB code behind,

I have a page with several required field validators + validation summary control(s). As noted in this post - when the client side validation runs the page gets scrolled to the top (window.scrollTo(0,0)). To change this behavior I implemented the second suggested alternative - I placed the following code at the bottom of my page:

    <script type="text/javascript">
        //Redefine the the window.scrollTo during the ValidationSummaryOnSubmit execution to avoid
        //  having the page scroll to the top...
        //  adapted from:http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=299399
        var ValidationSummaryOnSubmitOrig = ValidationSummaryOnSubmit;
        var ValidationSummaryOnSubmit = function() {
            var scrollToOrig = window.scrollTo;
            window.scrollTo = function() {}; //override with todo nothing
            var validationGroup = null;
            if (arguments.length>0) { //check for optional parameter
                if (arguments[0]) {
                    validationGroup = arguments[0];
                }
            }
            ValidationSummaryOnSubmitOrig(v