Javascript and PostBack

[kenbw]

This may not be possible, but how can I on a button click, disable the button and then cause the postback? I imagine this needs to be done via javascript.

Ken

 

[Zarcom]

Hey ken just add some javascript that disables the button to the onclick attribute of the button. When you click it the javascript will run and a postback will still occur.

.Attributes.Add("","&quot That'l do donkey, that'l do
Mark
If you are unsure of forum etiquette check here faq796-2540

 

[kenbw]

Mark,
Sorry I tried that and it did not work. I did not get my javascript to run. Here is what I have:

In the Code Behind:

Me.btnResubmit.Attributes.Add("onClick", "javascriptisableButton();&quot

In the HTML:

<script language=javascript>
function DisableButton()
{
//document.getElementById(&quot;btnResubmit&quot.enabled = false;
alert(&quot;Hi!&quot;
}
</script>

Does not seem to run the alert(&quot;Hi!&quot;

Ken

 

[Zarcom]

Ken I put this following code into my page_load event handler and things worked just fine.
Only difference I can see is that you have a &quot;;&quot; after you call your javascript function. That and I dynamically loaded the javascript function itself but that shouldn't make a difference.

Dim sb As New StringBuilder()
sb.Append(&quot;<Script Language=javascript>&quot
sb.Append(&quot;function DisableButton() {&quot
sb.Append(&quot;alert('Hi!');&quot
sb.Append(&quot;}&quot
sb.Append(&quot;</Script>&quot

RegisterStartupScript(&quot;Disable&quot;, sb.ToString)


Button1.Attributes.Add(&quot;onClick&quot;, &quot;javascriptisableButton()&quot

sb = Nothing That'l do donkey, that'l do
Mark
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[link9]

The reason it doesn't work is that there is already an onclick event specified for the button (the one that does the postback). If you examine the html source, you'll see it.

The workaround that I've found for this situation is to add a regularly flavored html input button, and specify an onclick for that which first disables the button, and then

.submit()

s the form.

The answer to getting answered -- faq855-2992

 

[Zarcom]

Are you sure about that Paul? My code did work. And when I view the source I only see this

<input type=&quot;submit&quot; name=&quot;Button1&quot; value=&quot;Button&quot; id=&quot;Button1&quot; /></P>
<P>
<input type=&quot;submit&quot; name=&quot;Button2&quot; value=&quot;Button&quot; id=&quot;Button2&quot; /></P>

No onclick events specified That'l do donkey, that'l do
Mark
If you are unsure of forum etiquette check here faq796-2540

 

[kenbw]

Guys,
I actually found away to do it with the asp button. I had to add some code to the Attribute to set the Post Back Event Reference. Also I had to turn Client Validation off on the button. Here is what it looks like now.

Code Behind:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

Me.btnResubmit.Attributes.Add(&quot;onclick&quot;, &quot;javascriptisableButton();&quot; & Page.GetPostBackEventReference(btnResubmit))


End Sub

Javascript:

<script language=javascript>
function DisableButton()
{
document.getElementById(&quot;btnResubmit&quot.disabled = true;
}
</script>

Button Call:
<asp:button id=&quot;btnResubmit&quot; tabIndex=&quot;26&quot; runat=&quot;server&quot; CssClass=&quot;buttonred&quot; Text=&quot;Resubmit&quot; Width=&quot;70px&quot; CausesValidation=&quot;False&quot;></asp:button>

Thanks for all the help and tips though.

Ken