CalendarExtender: onclick

Showing posts with label onclick. Show all posts

Monday, March 26, 2012

Call the method bound to an linkbutton after ajax callback

Hi everybody

I just have the following problem:

I created a ASP-LinkButton and added a method in the code-behind file for its onclick event. Then I added a break point at the beginning of the method to check if it's called.

Now I added a JS which calls the __doPostback("xxx", ""); exactly like the LinkButton does and everything works fine.

Now I add a Webservice, which validates my input and if everything works fine, its callback should call the click method of the asp-button. Guess what happens: the postback is called, but not the event of the button. If I do this before outside the callback - everything works fine, so I know the code is correct.

I even tried to add a "window.setInterval" timer which always checks a bool and calls the postback as soon as the bool is turned to true ... Then I set the bool after the callback and guess again: The postback is called but not the method ...

I don't have any further ideas for workarounds - anyone got a hint for me?

THANKS!

Hi,

Now I get a general idea of your situation. But your description doesn't give me sufficient information to find the cause.

Accordingly, I made a sample, please try it.

<%@. Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>Untitled Page</title></head><body> <form id="form1" runat="server"> <div> <asp:ScriptManager ID="ScriptManager1" runat="server"> <Services><asp:ServiceReference Path="WebService.asmx" InlineScript="true" /> </Services> </asp:ScriptManager> <asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">LinkButton</asp:LinkButton></div> </form> <script type="text/javascript"> var count = 0; function callBack(result) { if(result) __doPostBack('LinkButton1',''); } function callWS() { count++; WebService.ShouldCallBack(count, callBack); } window.setInterval(callWS, 2000); </script></body></html>

using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;public partialclass Default3 : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e) { }protected void LinkButton1_Click(object sender, EventArgs e) { Response.Write("Linkbutton is clicked on " + DateTime.Now.ToString()); }}

<%@. WebService Language="C#" Class="WebService" %>using System;using System.Web;using System.Web.Services;using System.Web.Services.Protocols;[WebService(Namespace = "http://tempuri.org/")][WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)][System.Web.Script.Services.ScriptService]public class WebService : System.Web.Services.WebService { [WebMethod] public bool ShouldCallBack(int count) { return count == 5; } }

Hope this helps.

Saturday, March 24, 2012

call codebehind onclick function from modal popup

My modal popup extender pops up an asp:panel that has a couple asp:textbox'es and an OK asp:button that I designate as the OKControlID. I've implemented a javascript function called OnOK() that's designated as the OnOkScript in my control extender, and also implemented a Button_Click function for the OK Button in my page codehind. How do I get the codebehind function to get called. My code calls the onOK script and stops.

Thanks!

Short answer:

You can't. The behavior adds a handler for the click event of the button which executes the OnOkScript(). This prevents a postback from occurring, and a postback is what you need to occur in order to call your code behind function.

Long answer: If you use the property "EnablePageMethods='true'" in your script manager, and assign [WebMethod] attribute to your codebehind, you can call that codebehind method from your JS OnOK function.

LSU:

Tried leaving a message for you on your listed website, but it

doesn't allow anonymous comments, and I didn't want to have to

an MPE.show in my code behind trying to get the MPE to

display as a result of running code, (not a button click) and

get a runtime error.."cmdDelete already has a data item registered."

VS2005 Pro has no problem with the code..am I using it out of

context?..what am I doing wrong?..

Thanks..

LSU.Net:
Short answer:
You can't. The behavior adds a handler for the click event of the button which executes the OnOkScript(). This prevents a postback from occurring, and a postback is what you need to occur in order to call your code behind function.
Long answer: If you use the property "EnablePageMethods='true'" in your script manager, and assign [WebMethod] attribute to your codebehind, you can call that codebehind method from your JS OnOK function.

Haha! Both answers looked "short" to me. Big Smile
It may not work for the poster's case since the CodeBehind is a WebMethod hence static method which is independent from the page object concept and so if there're reference to the page's objects in the code-behind it'll fail. For the original poster, you may have to "cheat" your way to get it to work. Please see this threadhttp://forums.asp.net/thread/1669503.aspx . I hope there'll be support from AJAX client side or we may have to extend the ModalPopup extender. Big Smile

G20:

Thanks for your input ! I haven't had time to read /absorb the details of the

link yet, but will today. George Bernard Shaw said:

"Science is always wrong. It never answers one question without asking

10 more."

Themodal.hide works fine from the code behind.

Themodal.Show is syntactically acceptable in the code behind,

but doesn't. Why? Where is it used? What is it supposed to do?

.Show works fine in my VB / Access apps (ha ha!)

Seriously, I've been looking for a comprehensive source for

the props & methods of AJAX controls..with examples, like

MSDN would be awesome. Then I could be self -reliant.

Any help there?

yeah i have the same problem as you.

I need to fire/call the modalpopup when there is a textchanged event in a textbox.

I have tried everything i can think of jscript wise.

I also dont' get why the modalpopupextender1.show() isn't working...

If you get this figured out could you please post it ? Ill do the same if i can figure it out.

Thanks

Wednesday, March 21, 2012

CalendarExtender onclick?

When you click on a date in the ajaxToolkit's Calendar Extender, the calendar doesn't disappear. What can I do so that it disappears on clicking a date?

to close the calendar onClick i set this up in the code behind

//Hide the calendarprotected override void OnLoad(EventArgs e) { Page.ClientScript.RegisterClientScriptBlock(this.GetType(),"hideCalendar", @."function hideCalendar(cb) { cb.hide(); }",true);base.OnLoad(e); }

and this is what the asp code looks like

 <cc1:CalendarExtender ID="CalendarExtender1" runat="server" TargetControlID="txtDate" OnClientDateSelectionChanged='hideCalendar'>

Great, I had the same issue.

Actually I noticed that you don't need to have any code behind, you can simply put:

OnClientDateSelectionChanged="function hideCalendar(cb) { cb.hide(); }"

And it will work. Works even if you have more than one extender.

Thanks a lot guys! You saved a life today!

Hello..!

Is there anyone who can help me...! Please. I have created a web page with master page then i inserted CalendarExtender in the web page but in running mode when i click on the related textbox it doesnt show the calendar... I dont know why?...
note: i inserted script manager in master page......

So, What is the possible solution..???

Thanks, Waseem

I just had problems with the calendar extender myself so I think i can help... but u'll have to show us what you have already!

CalendarExtender needs OnMouseOut and OnClick events

CalendarExtender needs OnMouseOut and OnDateSelected events or at least the ability to hide itself when these events occur.

CalendarExtender currently has two modes, textbox-focus and button-click. If you have not associated a button to the Calendar, the calendar will show when the textbox has the focus, hide when it does not have the focus, but will stay visible when a value is selected.

When the calendar has an associated popup button, it will show when the button is clicked and hide when it is clicked again, and hide when a value is selected.

When the date value changes, the onchange event of the textbox itself is fired, although I may add a dateChanged event to the CalendarExtender as well.

Ron

Thank you for your help.

I have a CalendarExtender assigned to an TextBox and an Img (instead of a button so the calendar appears) within a FormView which is within a TabContainer which is in a UserControl. This works fine...But I just noticed that if you click on the Img to bring the Calendar up it stays visible while you change the tabs of the TabContainer.

I think some form of OnMouseOut event is needed as it is a bit of a problem with the calendar staying visible.