Can any one please tell me why????

I have a page that disables a button server-side, but on the client-side theres a script that based on some values enables the button. On the page theres also a textbox with a required field validator.

What happens is that the validators are not fired.

After some source-code review and some "reflection" on the subject, I found that the AddAttributesToRender of the button only writes the postback scripts if the button is enabled:

protected override void AddAttributesToRender(HtmlTextWriter writer){	...    bool isEnabled = base.IsEnabled;    string firstScript = string.Empty;    if (isEnabled)    {        firstScript = Util.EnsureEndWithSemiColon(this.OnClientClick);        if (base.HasAttributes)        {            string text3 = base.Attributes["onclick"];            if (text3 != null)            {                firstScript = firstScript + Util.EnsureEndWithSemiColon(text3);                base.Attributes.Remove("onclick");            }        }        if (this.Page != null)        {            string secondScript = this.Page.ClientScript.GetPostBackEventReference(postBackOptions, false);            if (secondScript != null)            {                firstScript = Util.MergeScript(firstScript, secondScript);            }        }    }    ...    if (this.Enabled && !isEnabled)    {        writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled");    }    base.AddAttributesToRender(writer);}

So I asked myself: "Is this the same for all controls?"

It seems not. After some more "reflection", now on the TextBox control, I came to the conclusion that it's control-base, since the TextBox renders the postback script regardless of it's enable state. Some have, others don't.

When more and more web application have client-scripts changing the controls, I can' t understand this decision. Can you?