MVC :: Get Dropdownlist Onchange To Work?
Jan 1, 2010
New to MVC and jquery. I have a dropdownlist on my page and want to populate another field on the page, depending on what is selected from the dropdownlist. The data to be displayed in the other field needs to be retrieved from the database using the value of the selected item. I have found similar posts and have implemented the following, which doesnt seem to work.
jquery:
<script language="javascript" type="text/javascript" src="../../Content/Scripts/jquery-1.3.2.min.js" >
$(document).ready(function() {
$("#CourseID").onchange(function() {
var dropdownval = $("#CourseID").val();
[Code].....
I realize the action isnt correct, but at this point I can even into the action. I cant determine if the onchange is not firing or if there is some other problem.
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Similar Messages:
Jul 2, 2010
I have 3 security question drop down menus. I have javascript on the ASPX page that removes questions/repopulates them when you select a questions (so you cannot reselect the questions in the other 2 boxes). This works wonderfully when a user is editing their profile with already selected questions. However, when a user first selects the questions where all three boxes are listing "select a question" at selectedIndex 0, the onChange doesn't fire. The function won't even go. I think this has a big something to do with the on change from selected index of 0. I have debugged this thing and it doesn't even enter the function. I even set the onchange action to flash an alert. It just seems something is going wrong when i try to action onchange from selected index of 0.
View 2 Replies
Jan 14, 2010
I'm having trouble generating onchange event code for a simple order form housed in a datagrid.This takes product items from sql database,whereas user can enter quantity (originally set to 25) of cards they want to order (the textbox id is txtQty). if they order 50 (so if they order 25 to 49,the price would stay the same for the lot),the subtotal for that given product will change another 15 dollars greater.,so the formula for the price wouldnt be product * price, but "if qty = qty + 25 then subtotal = price + 15".Then the button click event would add the subtotals to a grand total.
I cannot coordinate teh adequate javascript that would fit with this type of scenario,given that this is all predicated on each product coming from the database; i'm wondering if there is another good source i can be directed to that would show helper functions in the code behind or header subs to calculate the onchange (or textOnchange) event of the textbox.
<form name="mydgrid" runat="server">
<asp:DataGrid id="dgProducts" runat="server"
AutoGenerateColumns="False" CellPadding="4"
[code]...
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Mar 10, 2010
i have dropdownlist with autopostback=true,
written onchange event for confirm popup and SelectedIndexChanged event also exists.
req is if confirm returns true then only postback should happen else not
instead its not atall doing postback whether it returns true or false.
i managed to get it work by forcing postback by using __doPostback()
View 13 Replies
Mar 7, 2011
i have a dropdownlist whose autopostback = true , but for some selected text i do want tht the autopostback really shouldnt fire .. using jquery...
however i hav really tried out using removeAttr() to remove attribute and then evt.preventDefault() which ofcourse should prevent the postback...
also tried to set the evt.returnValue = false so that the value returned by the dropdownlist change event is false ...
d code snippet i tried out is like :
[Code]....
none of the above resulted in stopping the postback..
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Oct 8, 2010
I m trying to stop the postback causing by ddl. I have tried the following code but still pb doesnt stop:
<script type="text/javascript" language="javascript">
var ddlSubCategory = document.getElementById("ctl00_m_g_73a5a887_bd36_4a37_966a_ed640c804a84_ctl00_ctl04_ctl09_ctl00_ctl00_ctl04_ctl00_ctl00_SubCategory"); //Get this form html source
ddlSubCategory.removeAttribute("onchange"); //Here "onchange" attribute causes post back
</script>
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Aug 12, 2010
I'm trying to display a confirm message box before firing selectedIndexChanged when user change selection in the dropDownList. I was wondering if anyone would an example of how to do this.
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May 14, 2010
I am currently writing an MVC app and currently only have one master page. I would like to add a dropdownlist to my main page and on selection of this to be able to switch the master page used. Has anyone acheived this before. I am unsure of how to force the onchange in the dropdown to fire some code behind in my controller.
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Feb 11, 2011
I have a country dropdown and a city dropdown.I am filling the country dropdown at the time of page load and showing the city dropdown blank. On the "onChange()" event of the country drop down I am filling the city dropdown according to the country id.
My problem is that after the postback of the page on the "onChange()" event , I am not getting the selected country name(i am getting the "--select country--"). How can i solve this problem.I am waiting for your response.
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Jun 9, 2010
I searched all day a solution to my problem.I worked with MVC 2 with visual studio 2010.I want to bind dropdownlists according to the value selected in an other dropdownlidt (but the datas are not linked in the database).In fact, I have a function in a controller and I tried to call it thanks javascript. But during the debug, it never goes in this function.If I'm not clear, ask me some question.
[Code]....
[Code]....
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May 25, 2010
I have a callback handler done in VB which works fine with this code:
<!-- Div Outside Form -->
<div class="container">
<form id="querydata" runat="server">
<asp:DropDownList runat="server" ID="myddl" AutoPostBack="true" OnSelectedIndexChanged="myddlhandler">
[Code]....
It the postback no longer works. Is how asp is supposed to work? Or is it some magic error that only works for me? And most importantly, if asp is not supposed to work this way, how should I be doing this?
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Nov 22, 2015
How i can use dropdownlistbox instead listbox for this code?
<div>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<link href="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.0.3/css/bootstrap.min.css"
rel="stylesheet" type="text/css" />
[Code]....
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Jun 29, 2010
I have a dynamic dropdown that is populated from sql. The user is supposed to select an option from the dropdown, then click a search button on the form to return some results based on that selection. It works fine if the dropdown gets populated with more than one record. However, if only one record is returned, that one record can't be selected. Whether you select it or just leave it alone since it's the only one, when you click the form button (search button), no results are returned b/c the dropdown selection must not be actually selected.
I've included the relevant code below. First the DDL, then the datasource, and finally the C# code in the if (!Page.IsPostBack)
[Code]....
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Aug 27, 2010
I am using code I have always used in other version of VS for binding to a list box.
After binding a dataset to a ListBox in VS 2010, render the page, and cilck any item in the list, the on change event always goes back to the first item in the list!
The following code to run the list box runs once...
if (!Page.IsPostBack)
DataSet ds = UWA.AWHWebServices.GetAllBranches();
LBCSC.DataSource = ds;
LBCSC.DataTextField = "BUSN_ROLE_NM";
LBCSC.DataValueField = "BUSN_ROLE_TYP_CD";
LBCSC.DataBind();
Now instead if I load the list box using Items.add, render the page, and then click on any item in the list I get the correct item selected.
for (int i=0;i<ds.Tables[0].Rows.Count; i++){ LBCSC.Items.Add(ds.Tables[0].Rows[i] "BUSN_ROLE_NM"].ToString());}
Is this a VS 2010 Bug?
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Apr 15, 2010
I am using Web expression's aspx form + Microsoft Access database + C# to create a page. I am trying to fire client side script (Javascript) and server side script (Autopostback for databinding) simultaniously without using "Codeback"/"CS".
I am not able to acheive the result. I have read all the 139 pages in trying to find the solution posted in asp.net. I am able to fire client side script (Javascript) but Autopost back is not working and Onselectindexchanged is giving runtime error when I go to publish.
Here is the code.
<form id="form1" runat="server">
<strong><br />
Select City : </strong>[code]...
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Mar 16, 2010
I am trying to get some in how to check if an onblur just happen. What I am doing is calling a javascript function onchange for a textbox. how can I check if onblur just happen too. in theroy here is what I want do to. this code is inside of the javascript funciton called by the onchange from the textbox.
if(onblur happen)
{
do something
}
else
{
do nothing to text box
}
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Jul 13, 2010
How do i load the dropdown list with a selected value there is a also an onchange event?
List<SelectListItem> environments = new List<SelectListItem>();
environments.Add(new SelectListItem { Text = "Development", Value = "DEV"});
environments.Add(new SelectListItem { Text = "Staging", Value = "STA" });
environments.Add(new SelectListItem { Text = "SNL", Value = "SNL"});
environments.Add(new SelectListItem { Text = "Production", Value = "PROD" });.......
View 1 Replies
Oct 5, 2010
I have tried to search web regarding my query but couldn't find what I actually require, I was about 70% near but couldn't achieve what i'm looking for.
To put it simple, below is my query:
I have an ASP page which has a select box (input box) in which I'm adding request numbers through SQL database.
Below are some empty text fields, check boxes.
Whenever any user selects any of the request numbers from the select box, I want to query the database and update the below text boxes and check boxes according to the request number.
I don't want user to press any button or refresh or another frame.
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Apr 11, 2012
I tried to call a java script in onchange event of the check box.
It works in IE8 but not in IE7.
Is there a way to make it possible in IE7.
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Mar 22, 2011
I've got a server control that renders out a series of dropdownlist and a checkbox that all have autopostback set to true. When the control renders the onchange event binding is not written out!
Controls are defined as protected, named and added to the controls collection in OnInit, and rendered via RenderControl(writer). Page.requiresPostback is also set.
ANy ideas why this might be? I'm scratching my head.
/* chopped version of the code in question */
[Code]....
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Oct 9, 2012
I have kept four column in gridview with dynamically added row...
E.g.
work type rate noofworker amt
Groundwork 10 100 1000
Earthwork 20 100 2000
Total 3000
OnChange event to fire the calculation...
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May 25, 2010
How can I get a gridview (that is inside an update panel) to update/filter whenever something it typed into a related textbox outside that panel..( possibly in another update panel)?
As in Google. When you start typing, it starts autocompleting for you by looking up words in the background using the text you've typed.
I want, in effect, for a user to start typing in a textbox (say "Order #" textbox) and each time a character is typed, to trigger an update to a gridview that has a 'search param' in it's SQL Datasource SP that plugs the textbox's text into the where clause of the select inside the SP...
make sense? I have the SP and all other related code, I would just need to know how to create a JS function (preferably via server-side using something like:
txtOrderID.Attributes.Add("ontextchanged",....
Rather than hardcoding client-side JS....
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Dec 10, 2010
I have TextBox which
id="test" AutoPostBack="true" OnTextChanged="server event"...
On Client Side I write logic if fail prevent Server Event fire.
I try
[code]....
I can see the alert fire, but can not prevent the server side event fire.
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May 28, 2010
I have a sample I got from the web (link is in the code). It colors the background on a control's contents if they've changed (visible change indication for the user). However, when I change a textbox to Multiline it fails. How can I fix this?
Sample:
Web Page:
[Code]....
[Code]....
[Code]....
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Dec 30, 2010
In my web form, I have dropdown list with autopost back true in ajax update panel. I have javascript alert in Onchange event. But it fire twice and alert msg show it twice
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