Web Forms :: Create Dynamic Radio Buttons In Webpage And Then Access Their Values In Postback?

Mar 24, 2011

I need to create dynamic radio buttons in my page, and then access their values in postback

I create the buttons using the following code:


In the post back I try to access the radio buttons using their created ID:


But it seems that the find method is never finding the Radio button control.

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Web Forms :: Clicking Radio Button In Web Control Causes All Other Web Control Radio Buttons To Fire Postback?

Feb 8, 2010

I have a web application that shows a page containing between 6 and 20 AJAX UpdatePanels, contained with Custom Web (.ascx) Controls.

You can see an example of such a page here:


The problem I'm getting is that when the user FIRST clicks any of the radio-buttons on any of the controls in the page, ALL the radio buttons that have an active selection ALSO fire an rb_CheckChanged event (see application log below). On subsequent radio-button
clicks, only that RB fires the event (as expected).

This behaviour is having a dramatic impact on performance. The page loads quickly, and a "normal" RB click provides an AJAX update correctly within 1 second. The problematic first RB click, however, takes up to SIX seconds to process, which is unacceptable from a user experience standpoint.

Developed in VS.NET 2008, ASP.NET 3.5. Also I converted the "Web Site" solution to a "Web Application" (pre-compiled) and got the same performance (still too slow). Release builds run only marginally faster than debug builds.

Why would a single RB selection change cause all RB's that have a "selection" set on them to also fire? (The "selection" is determined through database settings every time the control is populated, which is called from within the parent page control's Page_Load function. This selection is determined also at first page load, since all the controls get populated then, so why would the clicking of an RB cause them all to fire an event, and only once? That's what I don't get...)

Not sure if this is an AJAX issue, or general ASP.NET UI issue, so I'm posting in two forums on this one.

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Web Forms :: Show Dynamic Data And Radio Buttons From Db?

Mar 8, 2010

I am pulling some dynamic data from database SP (data will change). I need to show that data into row format with radio buttons and i need to retive same data from the page (as user selection on radio buttons values) to save data to DB. create such page with data.

Retrive data from DB like below (pic)

Page need to display like below (pic)

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Sep 13, 2010

I am having a bit of trouble trying to get teh postback data from a programmatic generated radio buttons in TableCell object. I have the following ASP user control:

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="wcntrlCallFlow.ascx.cs" Inherits="CallEvaluation.wcntrlCallFlow" %>
<style type="text/css">
width: 100%;
border-style: solid;
border-width: 1px;
border-color: Black;
width: 100%;
border-style: solid;
border-width: 1px;
border-color: Black;
width: 100%;
border-style: solid;
border-width: 1px;
border-color: Black;
<asp:Table ID="tblControl" runat="server"/>

I generate the TableRow and TableCell base off XML data file. When the submit occurs I can not access the data values from the radio buttons that are generated. I try to get the data in the following manner:

this.value = 5;

I notice that in the Request object the table row name is passed back like: "wcntrlCallData1$wcntrlCallFlow1$CallFlow".

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Oct 25, 2012

Working on VS2008 with using .vb

I have placed two radiobutton's on simple .aspx page. I didn't used any Update PanelĀ or any javascript on that page also set both radiobutton's AutoPostback="True", But it's not responding as I want.

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Jan 4, 2010

I have a table, that contains a number of rows, in each row there are three columns that are mutually exclusive. What I need is to be able to have radio buttons that are linked across the three columns.

Action 1
Comment 1
Action 2
Comment 2
Action 3
Comment 3

I'd like for where there is a 1 for it to display a checked radio button, and where there is a 0 for it to be unchecked. This can then be edited by clicking the radio in another column where necessary.

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Converting Client Side Html Radio Buttons To Web Controls With Dynamic Ids?

Jan 12, 2011

I have the following client side code in .aspx page within a datalist itemtemplate that takes questions from the database like this:


The output is like:

1) What is your age group?
- Option 1
- Option 2
- Option 3
- Option 4

The ID's of the radio buttons are dynamic ("Q" & QuestionID). If there is no answer to a question then the GetVisible function returns false and the containing panel is hidden.

I have been trying to get rid of the html and replace these with asp:radiobuttons but it is not possible to set id's from databinding.. only simply. I was trying something like:

<asp:RadioButton ID="Q<%#Eval("ID")%>" runat="server" Visible='<%#GetVisible(Eval("OptionA").Tostring())%>'
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Here is the function that provides data:


but I'm finding it impossible to work with the html controls, i.e get their .text value from codebehind, or adding events!

better way to replace the html with suitable asp.net web controls or from the codebehind and output it. Or point me in the right direction?

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Apr 2, 2011

is it possible to dynamically create radio button options that are dependent on a value within a database? For example 'b' is stored in a field so then 'a' will also be a radio button option, 'd' is stored in a database field so then the other radio button options will be 'a', 'b', 'c'....the radio button list will change depending on the value stored in the database field.

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Create Different Search Methods Using Radio Buttons

Apr 12, 2013

I am trying to create different search methods using radio buttons. This is a web app. using asp.net and vb.net

1)Radio Button 1 - search by Account Number - txtAccountNumber
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3) Radio Button 3 - search by Customer ZipCode - txtZipcode

One search button - btnSearch

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If option 2 is selected, the search has to align to txtLastName, and other txtboxes are visibly disabled
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Protected Sub rbSearchZipcode_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs) Handles rbSearchZipcode.CheckedChanged

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im creating dynamic buttons on page load and on the click event of button1 handlere iam creating more buttons this is going fine but on click event of button 2 work is not done so how to maintain a chain of creation of button on click events

protected void Button2_Click(object sender, EventArgs e)//

ClientScript.RegisterClientScriptBlock(this.GetType(), ((Button)sender).ID, "<script>alert('Button_Click');</script>");
Response.Write(DateTime.Now.ToString() + ": " + ((Button)sender).ID + " was clicked");

protected void Button_Click(object sender, EventArgs e)//this button click will call all the items related to department


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<table id="Table1" border="0">
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<asp:Table ID="Table1" runat="server">

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Mar 4, 2010

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In a single time one radio button only can be checked the rest two would be unchecked

Here i have pasted the aspx file design source


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protected void Button_Click(object sender, EventArgs e)
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For Example :

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I need a control which can hold an image and two radio buttons, like the one we have when we upload a pictures on fb / orkut. 1. Image 2. Delete radio button. 3. Cover radio button. [Set this image as cover of album]

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1> All images come on new line i want them next to each other.

2> How to detect which radio button is clicked as i have more than one images, and all have radio buttons.

3> How to capture click of radio button from aspx page?

4> If there is some other way to achieve this let me know.

Searched on google but could not find a solution for this.

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May 10, 2010

I have a writing a web page that will use several different types of control. The control types will depend on the data being read from a SQL database. The following is my code that decides what control to add to the page:

Select myReader.GetString(1)
Case "DatePicker"
Dim bdpAnswer As BasicFrame.WebControls.BasicDatePicker = New BasicFrame.WebControls.BasicDatePicker()
bdpAnswer.DateFormat = "dd/MM/yyyy"
Case "DropDownList"
Dim ddlAnswer As DropDownList = New DropDownList()
Case "RadioButton"
Dim rbAnswer As RadioButton = New RadioButton()
Case "TextBox"
Dim tbAnswer As TextBox = New TextBox()
End Select

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Jan 8, 2011

I have two radiobutton list .I want show an image on selecting two radiobutton in asp.net c#..I write the code in page load but its so me an error Object reference not set to an instance of an object. tell me code for it and in which event i have to write that code.

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I've got 3 groups of controls each of which I want enabled/disabled depending on which radio button the user has clicked.

The code *works*, but daaaaaayuum the postback time from a radiobutton click is long.

I suspect my approach is the noobish way, and that there's a slicker way to achieve this control-groups-enabled effect.

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Jan 20, 2011

I am working with a user control which is inside an UpdatePanel. The user control uses swfobject to add a flash object to a div in the user control. Part of the functionality of the user control is it allows the user to change 'channel'. The channel is set and handled in the code behind hence the call in the JavaScript below to <%=channel%>.

The problem I have is that when the new channel is saved, the JavaScript code below is still pointing to the old channel. The only way I can fix this is to refresh the page via the code behind, but I'm thinking there must be a better way to do this..


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Dec 5, 2010

i crate 5 textbox dinamically in the form with this code :


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Jan 17, 2011

I have radiobuttons within a datalist. The page where they appear is within a master page. The method I had in mind of achieving the validation is with a custom validator and the following sub:


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I also have tried another method as follows:


With this sub:


I then get the error Microsoft JScript runtime error: Object expected

Here is the datalist. I need to make sure the user selects an answer for each question:


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Mar 8, 2011

I have a user control I'm building that has a table layout with two sets of radio buttons, like:

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If I instead used a set of radiobuttons with a groupname for each, how do I get/set the selected button (for each set) from outside the UC?

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