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Drop-down menu postback changes the choices of another dropdown menu using C#

I am kinda new to the asp.net, and I am trying to do a drop-down menu that by changing the country for an example it changes the choices in the state/province drop-drop down menu ex: if i am to choose the country USA , the drop down menu shall contain the names of the states, but if i am to choose...

Posted to Web Forms (Forum) by corsairdee on 06-11-2009, 12:00 AM
Filed under: ASP.NET, postback, DropDown, <C#.>
Re: Dynamic User Control - RaiseEvent Fires every second postback

The soulution seems to be here: http://stackoverflow.com/questions/310002/events-on-aspnet-usercontrol-raise-every-other-click It looks like the problem is arising because my user control is recreated on each page reload - instead of being rebound. How do i rebind it?

Posted to Web Forms (Forum) by wmin on 02-10-2009, 12:00 AM
Filed under: user control, vb.net, ASP.NET, fire event, rebinding, postback
How can I know if the current page will redirect to another page?

How can I know in VB.NET if the current page will redirect to another page before unloading the current page? I am using a shared variable within the page class. I want it to free if the page will not post back. Is there any property or method of the page that I can use? Thank you.

Posted to Web Forms (Forum) by van.net on 12-09-2008, 12:00 AM
Filed under: page, redirect, vb .NET, ASP.NET, PostBack
Validation of Viewstate Mac Failed .net

Hi, I am trying to do a website for administration purpose.Which ,will have a webform,that Lists out all the users present in the database. I am listing users using datagrid.For each a every record i have a LOGIN Button,which will help our support guys to login without knowing the password for that user...

Posted to Web Forms (Forum) by aditya_raj on 07-21-2008, 12:00 AM
Filed under: page navigation, postback, validation of viewstate MAC failed, View state Problem, ViewState, viewstate MAC failed, asp.net, asp.net 2.0, datagrid, Exception, viewstate asp.net, ASP.NET 2.0 Webform, asp.net 2.0:GridView
Page Scroll Position

Please excuse me if this is a repeat of the existing posts but i did try to find out to get the solution before posting it here. I have a very long aspx page and like many of us would have encountered the problem of page losing out focus/scroll positions on each postback which is annoying. If a press...

Posted to Client Side Web Development (Forum) by ankit1407 on 05-30-2008, 12:00 AM
Filed under: positioning, postback, asp net javascript save changes prompt, asp.NET, asp.net 1.1, asp .net ... c# ... SQL, position
Getting error Sys.WebForms.PageRequestManagerParserErrorException

Hello, I am using a master page and i have placed a Ajax Script manager and the update panel in that page. Now i am creating a new file, which will inherit the master page, in that new file i am writing the code to download a sample file. But when i click on the Download button i am getting an alert...

Posted to ASP.NET AJAX UI (Forum) by Sudheendra B on 05-07-2008, 12:00 AM
Filed under: "AJAX Toolkit" "Ajax Control Toolkit", "ajax update panel trigger", PageRequestManager Javascript UI Syntax Error, postback, Postback updatepanel jump, PostBackTrigger, ScriptManager, ScriptManager DropDownList AutoPostBack PostBack Focus Preserve Mantain FormView UpdatePanel, ScriptManager RegisterClientScriptInclude UpdatePanel CustomControl Custom Control, ScriptManager UpdatePanel AsyncPostBackTimeout, Sys.WebForms.PageRequestManagerParserErrorException, toolkit, update Panel events, Update Panel response.Redirect ModalDialog, update Panel trigger javascript, updatePanel postbacktrigger, UpdatePanel response.Redirect, updatepanel trigger, UpdatePanel Trigger Postback RegisterPostBackControl, "Ajax Control Toolkit", "AJAX Toolkit", "Sys.InvalidOperationException", "Sys.WebForms.PageRequestManagerParserErrorException" "Dropdownlist" "CreateUserWizard" "Web Hosting Server", "Update Panel", AJax UpdatePanel, ajax .NET 2.0 AjaxControlKit PopupControlExtender debug There is no source code available for the current location Page_PreRender, AJAX .NET 2.0 for existing web application, ajax client doPostBack user web control, ajax update panel, ajax update panel IE, ajax update panel trigger, AJAX UpdatePanel, ajax updatepanel PostBack, ajax updatepanel trigger Timer, AjaxControlToolkit, ASP AJAX UpdatePanel Triggers, asp.net, asp.net ajax, asp.net tags, Asynchronous, asyncpostbackerror, event, master page, web.config ajax, masterpage ajax eliminate postback, masterpage menu, ajax 1.0, AJAX 1.0 UpdatePanel javascript, ajax control Toolkit beta2, asp.net ajax updatepanel, asp.net ajax updateprogress way
Master Pages and Postbacks

I have a problem with postbacks and master pages. I have a website project I’ve quickly put together to test this in Visual Studio 2005 (asp.net & c#). On the master page, there are two ContentPlaceholders. In one of the web pages called search.aspx (which uses the master page), I have a ASP.Net...

Posted to Master Pages, Themes and Navigation Controls (Forum) by dbrook007 on 03-31-2008, 12:00 AM
Filed under: Page.IsPostback, postback, postbackurl, Postbackurl POST INaming MasterPages, .NET 2.0 master page contentpage gridview, .NET 2.0 master page rebasing, .net 2.0 menu control menuitem css selectedstyle A, .net 2.0 navigation controls tree view......, .net 2.0 Page Load problem, 2.0, Allow html input fields, asp 2.0, Asp .net, ASP .net 2.0 Button javascript onKeyUp, ASP .net 2.0 reflection, asp .net 2.0 C# multiline textbox javascript IE Firefox, asp .net., ASP Master Pages Web Application, ASP.NET, asp.net 2.0, asp.net 2, ASP.NET 2 MasterPages Links subfolder, asp.net 2.0, asp.net 2.0 "master pages", asp.net 2.0 "master pages" refresh issue, asp.net 2.0 aspcompat master pages, asp.net 2.0 master pages, ASP.net 2.0., ASP.NET C#, content place holder, ContentPlaceholder, contentplaceholder masterpage, java script, javascript, javascript asp.net, javascript customvalidator asp.net dropdownlist, maste page default button focus, maste page event handling postbackurl, maste page forms authentication stylesheet, maste page no javascript check, maste pages, master page, master page user control, master pages, MasterPages, mater page, masterpage contententPlaceholder, Masterpage dropdownlist state, MasterPage Images, Asp.NET2.0, asp .net2.0 javascript event handlers, asp 2.0, asp.net client side code, .browser, Master page - Hidden Menu, Master Page - Web Control, Master Page - Web Control, Master page & Css, master page content function call invoke, master page controlos ContentPlaceHolder, Master page Javascript, Master Page Javascript Context Menu, .NET 2.0 master page contentpage, ASP .net 2.0 C#, asp .NET 2.0 masterpage master page refresh runtime changes, ASP .net 2.0 VB, masterPage, masterPage contententPlaceholder menu web.sitemap sitemapdatasource, Master page - Reload, .NET 2.0, asp.net 2.0 "master pages" refresh issue postback, asp.NET 2.0 C#, ASP.NET 2.0 Client Callback, asp.net 2.0 master page asp:menu menu control css friendly menu adapters data bind static item template, ASP.NET 2.0 VB.NET, Maste pages with membership controls, Master Pages - Stylesheet - CSS - Theme, Master.page.IsPostback, asp .net formview page unload confirm save changes client side script to server control
WebGrid Data Grid update with starter kit examples for file upload and postback values

A new WebGrid Data Grid update is now available. Deliver any Web forms rapidly ( with AJAX technology ) with a nearly codeless development experience and with powerful GUI toolset at hand you will be able to easily build highly interactive, standards-compliant, and cross-browser compatible web applications...

Posted to Announcements (Forum) by WebGrid on 01-28-2008, 12:00 AM
Filed under: postback, asp.net, file, file upload
CustomValidator strange behavior

My CustomValidators are doing something they appearently should not be able to do. I remember them doing this exact thing when I started ASP.NET several years ago and I thought it was their standard behavior until suddenly they stopped for no apparent reason. The thing is, they run the validation on...

Posted to Web Forms (Forum) by Saturday3AM on 12-16-2007, 12:00 AM
Filed under: ASP.NET, bug, CustomValidator, validate, PostBack, behavior
Re: Post Backs

The above statement gives a hint that the database is updated on every page load. Thats why I suggested to make use of the IsPostBack function. Also, Asp.Net executes the page_load function on each postback to the server. Even If it is a button click!!!!. So If you dont check the IsPostBack, you will...

Posted to Getting Started (Forum) by born_2_code on 08-24-2007, 12:00 AM
Filed under: postback, asp.net

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