ASP.NET

radiobuttonlist postback error

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Join Date: Jul 2009

Posts: 7

Reputation: phantom1000000 is an unknown quantity at this point

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phantom1000000 phantom1000000 is offline

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Newbie Poster

radiobuttonlist postback error

Oct 30th, 2009

Hi all,
I've got a spot of bother with my radiobuttonlist. It has 3 items in it and I want them to control the visibility of certain divs/tables.

But even simple text changes are becoming a headache and the postback is not firing the event I clicked on but the PREVIOUS event (ie, I click on value 1 and text shows nothing, I click on value 2 and text shows value 1, I click on value 3 and text shows value 2)...always 1 step behind.

Here's my code:

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 ASP.NET Syntax (Toggle Plain Text) 
function SetMessageInTextbox() {
var rdolist_0 = document.getElementById("rdolist_0");
var rdolist_1 = document.getElementById("rdolist_1");
var rdolist_2 = document.getElementById("rdolist_2");
if (rdolist_0.checked)
document.getElementById("TextBox1").value="One";
if (rdolist_1.checked)
document.getElementById("TextBox1").value="Two";	
if (rdolist_2.checked)	
document.getElementById("TextBox1").value="Three";
}
function SetMessageInTextbox() {
var rdolist_0 = document.getElementById("rdolist_0");
var rdolist_1 = document.getElementById("rdolist_1");
var rdolist_2 = document.getElementById("rdolist_2");
if (rdolist_0.checked)
document.getElementById("TextBox1").value="One";
if (rdolist_1.checked)
document.getElementById("TextBox1").value="Two";	
if (rdolist_2.checked)	
document.getElementById("TextBox1").value="Three";
}

I've tried combinations of adding attributes in the vb.net pageload function, the vb.net code behind rdoList.selectindexchange using
rdolist.Attributes.Add("onload", "javascript

etMessageInTextbox()")
and also the onClick event of the HTML page.

If you can assist, please do.

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Join Date: Apr 2009

Posts: 225

Reputation: mail2saion is an unknown quantity at this point

Solved Threads: 34

mail2saion mail2saion is offline

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Posting Whiz in Training

Nov 1st, 2009

HI,
You can use the below javascript method to read asp radio button list selectindex, selected value.

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<script type="text/javascript">
 
function GetRadioButtonSelectedValue()
{
var AspRadio = document.getElementsByName('Aspradiobuttonlist');
 
for (var i = 0; i < AspRadio.length; i++)
{
 
if (AspRadio[i].checked)
{
var lblAspradiobuttonValue = document.getElementById('<%= lblAspradiobuttonValue.ClientID %>');
 
lblAspradiobuttonValue.innerHTML='<b>Selected Value:</b> '+AspRadio[i].value+'<br/>';
lblAspradiobuttonValue.innerHTML+='<b>Selected Text:</b> '+AspRadio[i].parentNode.getElementsByTagName('label')[0].innerHTML;
}//end if
 
}// end for
 
}//end function
</script>
<script type="text/javascript">

function GetRadioButtonSelectedValue()
{
var AspRadio = document.getElementsByName('Aspradiobuttonlist');

for (var i = 0; i < AspRadio.length; i++)
{

if (AspRadio[i].checked)
{
var lblAspradiobuttonValue = document.getElementById('<%= lblAspradiobuttonValue.ClientID %>');

lblAspradiobuttonValue.innerHTML='<b>Selected Value:</b> '+AspRadio[i].value+'<br/>';
lblAspradiobuttonValue.innerHTML+='<b>Selected Text:</b> '+AspRadio[i].parentNode.getElementsByTagName('label')[0].innerHTML;
}//end if

}// end for

}//end function
</script>

WHERE Aspradiobuttonlist is the id of radiobuttonlist server control.

Hope it will help you.

Last edited by mail2saion; Nov 1st, 2009 at 5:35 am.

MARK AS SOLVED if its help you.

REGARDS
MCTS - Shawpnendu bikash maloroy
http://shawpnendu.blogspot.com

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Join Date: Jul 2009

Posts: 7

Reputation: phantom1000000 is an unknown quantity at this point

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phantom1000000 phantom1000000 is offline

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Newbie Poster

Nov 3rd, 2009

Hi,

Thanks for the reply. Unfortunately, you're code doesn't have the desired result. What does seem to happen is that if I make a selection, no answer will appear, but if I next press the area around a radiobutton, but still on the radiobuttonlist control, it will respond with the correct response.

So in other words, the change of index doesn't fire the function, but clicking the list (not a direct radiobutton) does.

This is counter-intuitive if you ask me and I can't expect the users of the page to do this.

Any clues?

Thanks again.

•

Join Date: Jul 2009

Posts: 7

Reputation: phantom1000000 is an unknown quantity at this point

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phantom1000000 phantom1000000 is offline

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Newbie Poster

Nov 3rd, 2009

Okay, just figured it out. Now I think about it, it makes a bit of sense. I forgot javascript gets loaded with the page and therefore it does not need to post back to the server. I had autopostback set to true and by setting this to false, the desired effect came into play.

Thank you for your help.