Develop Reference

Receive RenderedNameAttribute from HtmlInputRadioButton

Actually I'm using an aspx custom radiobutton control like this
<input type="radio" id="declarableYes" value="Ja" name="declarable" class="form-radio" runat="server" required />
and i need to recieve the 'RenderedNameAttribute' which looks like this:
<input value="Ja" name="ctl00$ContentPlaceHolderMain$plcZones$lt$zoneMain$LegalData$declarable" type="radio" id="declarableYes" required="">
For exampel a asp.net 'System.Web.UI.HtmlControls.HtmlSelect' i can easely get the renderd Name attribute through the property controlXy.Name but for the RadioButton i can only access the "NonRendert" name which is in my case declarable.
I mentioned the Non-Public members where i can find the RenderedNameAttribute but i'm not abel to delegate to this property.
I need this value for javascript purposes.

I think you are looking for UniqueID property.
from MSDN:
This property differs from the ID property, in that the UniqueID
property includes the identifier for the server control's naming
container.
page.aspx
<form id="form1" runat="server">
<div>
<uc1:ucRadioButton runat="server" ID="ucRadioButton" />
</div>
</form>
ucRadioButtons.ascx
<%# Control Language="C#" AutoEventWireup="true" CodeFile="ucRadioButton.ascx.cs" Inherits="ucRadioButton" %>
<input type="radio" id="declarableYes" value="Ja" name="declarable" class="form-radio" runat="server" required />
Which will result in
hth

When you're dealing with ASP.NET all your server controls get's a very wierd name indeed, but there are solutions where you don't need to have this special id.
In JavaScript, you can request the ClientID, of the control which would do what you want.
For example, when you have the following control:
<asp:TextBox id="txtName" runat="server" />
And in javascript, you want to alert this control, you could do something like:
<script type="text/javascript">
alert('<%= txtName.ClientID %>');
</script>
This should alert the control itself.
When you want a textbox named "txtName" have the name "txtName" even in your source, you could declare it like the following:
<asp:TextBox id="txtName" runat="server" ClientIDMode="Static" />
For more information about the ClientIDMode, please check the MSDN documentation.

ANSWER:
I wasn't able to find a buid-in solution to get this property. So i made a workaround for this by creating an extension for the HtmlInputRadioButton which takes the UniqeID and replaces the ID - ending with the name of the radio button.
Code:
public static string GetRenderedName(this System.Web.UI.HtmlControls.HtmlInputRadioButton radioButton)
{
return radioButton.UniqueID.Replace(radioButton.ID, radioButton.Name);
}

Can i pass value received by the java-script in .aspx page to its corresponding .cs file in asp.net?

I have a abc.aspx file that is receiving some value using java-script.
i.e.
<asp:Content ID="Content1" ContentPlaceHolderID="ccont" Runat="Server">
<div id="ccont">
<script type="text/javascript">
function show(id) {
alert('id');
}
</script>
<div class="ccont">
</div>
As seen in the code above i can get certain int value say 1,2,3 and so on.But the value is inside the script tag.so my question is:
How do i get that value inside the body of the abc.aspx file say inside the div tag? ie anywhere outside the script.
How do i pass the value obtained in this abc.aspx file to its abc.axps.cs file

Try using ASP.Net's HiddenField control:
<asp:HiddenField ClientIDMode="static" ID="hiddenId" runat="server"/>
This will render an invisible input on your page will which hold your value.
Using jQuery, you can assign a value to it like this:
$(function(){
var value = $('.ccont').text(); //Get your value somehow
$('#hiddenId').val(value);
});
Once your page is submitted to the server, you will see that the hiddenId control will be populated in the page's OnLoad handler.

ASP (.NET 4) ViewState enabled Literal control not retaining changes to HTML contents on PostBack

I am populating a ListView with HTML from a database using a Literal with Text='<%#Eval("HTMLData")'%>. When I trigger a PostBack, changes to the loaded HTML are not being reflected in litRowData.Text.
ViewState is enabled for the page, the ListView, and the Literal in the ItemTemplate, and I am making sure to only populate the ListView with initial values from the database when if(!IsPostBack) is true in Page_Load.
<asp:ListView ID="lvForm" runat="server"
DataKeyNames="RowID" ItemPlaceholderID="phRow"
EnableViewState="true">
<LayoutTemplate>
<asp:PlaceHolder ID="phRow" runat="server" />
</LayoutTemplate>
<ItemTemplate>
<asp:Literal ID="litRowData" runat="server" Text='<%#Eval("HTMLData")%>'
EnableViewState="true"></asp:Literal>
</ItemTemplate>
</asp:ListView>
I need to be able to capture changes to the contents of the loaded HTML controls. Since this HTML comes from a database table, I can't just use ASP controls inside the ItemTemplate. Can anyone see something I'm missing, or suggest an alternative way to do this?
Edit:
To clarify a little more, I'm trying to load form input elements dynamically from a database, render them as HTML controls on the page, allow the user to modify their contents by entering text or selecting options, then capture the modified HTML and save it back to the database when the user clicks a save button.

The way postback works in .NET is actually a wrapper around the more basic idea of HTML forms. A basic example of HTML forms is:
<html>
<body>
<form action="" method="POST">
<input type="text" value="type here" />
<input type="submit" value="go" />
</form>
</body>
</html>
Roughly, what the .NET abstraction adds is:
<html>
<body>
<form action="" method="POST">
<input type="hidden" name="__VIEWSTATE" value="string-encoded-value" />
<input type="text" name="bob" value="type here" />
<input type="submit" value="go" />
</form>
</body>
</html>
Whereby on postback to your page, all input elements with names are mapped back into properties of your Page object, and the __VIEWSTATE hidden field is deserialized into all properties of objects that do not correspond to values of html input tags. For example, if Page.bob had a DateTime property associated with it, it would be stored in __VIEWSTATE possibly.
ASP.NET Literal tags in Page markup will get printed into the browser exactly as is, meaning that if you have <span>bob</span> as its value, that is how it will appear within the <form> tag. However, in plain HTML world, <form> tags when posted will only contain the values of certain form elements (aka not every div, span, p etc. gets posted back, only input, select, textarea and some others). So if your literal doesn't contain an input then it won't even get posted back meaning __VIEWSTATE will be used to restore the Value property of the Literal back to its initial state.
To fix this, you probably don't want to stick html into a Literal because even if you do it's not clear that it will get associated with the right property of your page. Instead, try a TextBox element or something else that gets written as an input element directly by the ASP.NET webforms code. Alternatively, try using javascript to allow modifications of flat text in divs if you don't need to persist the data.

This answer builds on the prior one now that you have a .NET TextBox control that is correctly posting back the value of edits. Right below it, you can add to code behind:
protected void Page_Load(object sender, EventArgs e)
{
litRowData.Attributes.Add("onKeyUp", "WriteText(this.value)");
}
Html:
<ItemTemplate>
<asp:TextBox ID="litRowData" runat="server" />
</ItemTemplate>
<div id="yourPreview"></div>
<script type="text/javascript">
function WriteText(val){
document.getElementById("yourPreview").innerHTML=val
}
</script>

Div onload function and embedding server code c#

I am trying to call c# properties in .aspx page, where myfunc is jquery function.
this function take parameters which i am passing through c# public properties. and I want to call this function as soon as div is rendered.previously i have done this on prerender event in ascx control. wha is exact ssyntax for below code and calling jquery function from here is valid?
<div class ="v" onload ="Javascript:myfunc('<%= this.articleID %> '
,'" +<%=this.UserID %>+"','" +<%=this.EncryptedUserID %>" +','" +<%#
this.ItemIndex %>)">
thanks
Edited
Ok If i do like this way
<div class ="v" >
<script language ="javascript" >
JGetTotalVotes(<%= this.articleid %> ,<%
this.ThisEncryptedUserID %>,<% this.ItemIndex %>,'aaa');
</script>
I do not want server side hidden fields solutions and if i use hiden field ( non server html tag) then i still need to call <%%> to fetch value from server side to hiddent field

I see you are missing single quote after the last parameter if that is not the problem.
You can use hidden fields and call the function in javascript
Add this to your page
<asp:HiddenField runat="server" ID="hdnArticleId" ClientIDMode="Static" />
<asp:HiddenField runat="server" ID="hdnUserId" ClientIDMode="Static"/>
<asp:HiddenField runat="server" ID="hdnEncryptedUserID" ClientIDMode="Static"/>
<asp:HiddenField runat="server" ID="hdnItemIndex" ClientIDMode="Static"/>
bind those hiddenfields in Page_Load event remember to add ClientIDMode="Static" to set the id as you set not a generated one by asp.net to have the ability to use them in javascript
Add To your javascritp
function YourFunction(){
var ArticleId = document.getElementById("hdnArticleId").value;
var UserId= document.getElementById("hdnUserId").value;
var EncryptedUserID= document.getElementById("hdnEncryptedUserID").value;
var ItemIndex= document.getElementById("hdnItemIndex").value;
// your code goes here
}
and don't forget to call your javascript function in page onload

Div elements don't pull in external content, so they don't have load events.
If you want to run some JS after a div element has been parsed:
<div></div>
<script> foo(); </script>

Unable to get value Textbox by id in javascript

I have text boxes and it has values let say. I am calling my javascript method on one of textbox 'onblur'. my function is:
function CalculateExpectedProductPrice() {
alert("hi i called");
var originalPrice = document.getElementById('hdnSelectedProductPrice').value;
var numberOfLicenses = document.getElementById('txtNumberOfLicense').value;
var enteredAmount = document.getElementById('txtAmount').value;
alert(originalPrice);
alert(numberOfLicenses);
alert(enteredAmount);
}
i am getting alert message as ""hi i called". but not further.
But some i am not getting values of these controls.
*Edited:* My HTML is :
<asp:HiddenField ID="hdnSelectedProductPrice" runat="server" />
<asp:TextBox ID="txtAmount" runat="server" Width="250px"></asp:TextBox>
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="txtNumberOfLicense" runat="server" Width="35px" ></asp:TextBox>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="txtNumberOfLicense" EventName="" />
</Triggers>
</asp:UpdatePanel>
Will there any impact master-content page . because script is in content page and html also on same content page.Also let me know you, I am using wizard control where as all these controls are resides on second step of wizard. will that make any impact ?
Edited:
I think wizard control making here matter. As i started my firebug and review the generated html it assign the Id dynamically to those controls which are inside the wizard. thats why javascript unable to find the expected control .
eg for txtAmount text box which is inside the wizard control getting name as :
ctl00_ContentPlaceHolder1_Wizard1_txtAmount
but certainly i would not prefer to use this generated Id. So is there any remedy to find control inside the wizard control and get - set values ?

get id of the control as shown below
var enteredAmount = document.getElementById('<%=txtAmount.ClientId%>').value;

It's impossible to say for certain with your not having quoted your HTML (!), but the usual reason for this is confusion between the id and name attributes. document.getElementById works with the id attribute, but people tend to think it works with the name on input fields, which it doesn't (except for on IE, where getElementById is broken).
(The other thing to remember is that id values must be unique on the entire page, but looking at the IDs you quoted, I suspect you're okay on that front.)
Update: It works if you use ids:
HTML:
<form>
<input type='hidden' id='hdnSelectedProductPrice' value='10'>
<input type='text' id='txtNumberOfLicense' value='2'>
<input type='text' id='txtAmount' value='3'>
<br><input type='button' id='theButton' value='Click Me'>
</form>
Live copy

As T.J. mentioned we really need to see your html code, without seeing it it could be that you are looking for an elements attributes.
So lookup the element as you are already with
var element = document.getElementById('product');
Once you have the element you can query its attributes
var price = element.getAttribute('price');

If its "ASP.net server control" then you will have to do it like this:
var originalPrice = document.getElementById('<%=hdnSelectedProductPrice.ClientID %>').value;

if you use Asp.Net 4.0 and your textbox is unique on the entirepage you can add ClientIDMode="Static" in attribute of your textbox
<asp:TextBox ID="txtAmount" runat="server" Width="250px" ClientIDMode="Static"></asp:TextBox>