How To 'subscribe' To An Event That Ripples To Client
Aug 30, 2010
i can use javascript setInterval() (in combination with jquery ajax) to 'poll' the controller action in order to determine if something 'new' should be renedered onto the page. However, I'm not a huge fan of polling, especially when client browsers can be left unattended and are uneccessarily polling for changes.
Multiply that by the number of potential client machines that could be browsing the app and you get a feel for the scale of the issue with this approach. Now, in truth, this is EXACTLY the approach that I use to refresh certain page fragments on some ('read' - MANY!!) of my existing sites.
However, I'd like to know what the options are for subscribing in 'reverse' to events and having the controller 'know' about the client browser and any events that it is subscribed to and the controller then 'push' out the update to the client on a 'needs must' basis. Is this something that happens outside of the normal desktop events scenario?
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Jul 2, 2010
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Mar 1, 2010
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[code]...
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Sep 12, 2012
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Below is code.
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head><body>
<form id="form1" runat="server">
<script type="text/javascript">
function displayAlternate(id) {
[Code] .....
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Apr 22, 2010
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Nov 9, 2010
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{
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[Code]....
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Sep 8, 2010
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Aug 26, 2010
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f (eventArgs.get_propertyName() ==
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alert(sender.get_ClientState());
}
}
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[Code]....
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Nov 24, 2010
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[Code]....
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Jun 19, 2010
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Nov 10, 2010
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Jan 4, 2011
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{
this.SaveButtonEvent += (EventHandler)ViewState["saveEvent"];
if (this.SaveButtonEvent != null)
{
this.SaveButtonEvent(sender, e);
}
}
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protected void Button2_Click(object sender, EventArgs e)
{
Label1.Text = TextBox2.Text;
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Feb 24, 2010
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Date: ' runat="server" CausesValidation="true"
ValidationGroup="group" Width="80px" AutoPostBack="true" OnTextChanged="txtDate_TextChanged">
Amount" ' CausesValidation="true"
ValidationGroup="req" runat="server" AutoPostBack="true">
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Right now my ASP page has a text box and a submit button, what I am trying to do is once the user hits the submit button load a drop down list.
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as part of a log feature that my client asked for, I'm tring to monitor whenever the browser is closed by the user.
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[Code]....
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Oct 26, 2010
I have built a basic calendar event using DDay.iCal, when I click "Add to calendar" link I produce an event and then sends this to the client.Basically, my application works like this.
A User logs in.
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Sending the event is done by using Response.Write() which sends the following to the client:
Response.ContentType = "text/calendar";
Response.AddHeader("Content-disposition", "attachment; filename=appointment.ics");
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May 26, 2010
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Sep 1, 2010
I am trying to add a client side event to a dropdownlist and I need to access the currently selected Text. I have tried:
ddl_tech.Attributes.Add("onclick", "document.getElementById('" + chk_techreview.ClientID + "').disabled = this.options[this.selectedIndex].text.Equals(' UNASSIGNED');");
and
ddl_tech.Attributes.Add("onclick", "document.getElementById('" + chk_techreview.ClientID + "').disabled = this.text.Equals(' UNASSIGNED');");
Both of which give me runtime errors when the event is fired.Whats the correct way to access this text property client side?I tried this but it does not enable the checkbox...
ddl_tech.Attributes.Add("onchange", "document.getElementById('" + chk_techreview.ClientID + "').disabled = this.options[this.selectedIndex].text == ' UNASSIGNED';");
ANSWER:
Well, along with having to use == rather than .Equals, when you set a checkbox.enabled = false on the server side it raps the checkbox in tags and sets it to disabled=true; therefore you must set BOTH the checkbox.disabled = false and checkbox.parentElement.disabled = false; on the client side to enable the checkbox!The solution:
ddl_tech.Attributes.Add("onchange", "document.getElementById('" + chk_techreview.ClientID + "').parentElement.disabled = (this.options[this.selectedIndex].text == 'UNASSIGNED'); document.getElementById('" + chk_techreview.ClientID + "').disabled = (this.options[this.selectedIndex].text == 'UNASSIGNED');");
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