ASP.NET AJAX UI

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

chetan.sarode — Thu, 25 Jun 2009 02:57:13 GMT

From you code it looks like you are older version of AJAX (atals:UpdatePanel). Please make sure thet you are using latest version of AJAX. You cn download it from here

http://www.asp.net/downloads/

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

blairg23 — Wed, 24 Jun 2009 18:55:44 GMT

http://www.menacestudio.com/blog/post/AJAX-and-radio-buttons-non-postback-issue-fixed!.aspx

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

nalinbc — Sat, 02 May 2009 13:18:47 GMT

I initially had the same problem, but was able to solve it using the following:

1. Set the AutoPostBack property to 'True' in the radiobuttonlist control.

<asp:RadioButtonList ID="RadioButtonListLevel" runat="server"

onselectedindexchanged="RadioButtonListLevel_SelectedIndexChanged"

AutoPostBack="True">

2. In the triggers collection, added the radiobuttonlist control and selectedindexchanged as the event

<asp:AsyncPostBackTrigger ControlID="RadioButtonListLevel"

EventName="SelectedIndexChanged" />

</Triggers>

Regards,

- Nalin J

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

Garbin — Sat, 06 Oct 2007 11:06:33 GMT

Hi Anna,

did you try the MutuallyExclusiveCheckBox control included in the Ajax Control Toolkit?

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

Maya Danka — Fri, 05 Oct 2007 20:02:47 GMT

I would be interested to learn.. I would like to have mutually exclusive boxes so If one is selected the other is deselected. I am having a a problem with the radio button to show False or true in the boxes while in edit (detailsvis). I was trying some code to covert to boelan, etc. but it does not realy work. Thanks.

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

dojaju — Tue, 02 Oct 2007 20:39:53 GMT

Hi,

I've still not found a way to have it work with a radiocontrol, but I've made it works with several checkboxes.

Then it's only some code to add the same behavior as radiocontrol to the checkboxes.

If somebody is interested in my solution, let's me know.

Kind regards,

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

dojaju — Fri, 28 Sep 2007 20:34:08 GMT

Somebody has already try with the new release??

Let us know the issue.

Thx

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

wander.mahet — Fri, 28 Sep 2007 17:28:25 GMT

Maybe this is also a bug in RadioButtonList

I'm using Visual Studio 2005, Ajax (UpdatePanel), a RadioButtonList which updates a DropDownList items.

Html code:

<form id="form1" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>

<asp:RadioButtonList ID="rblType" runat="server" AutoPostBack="True" OnSelectedIndexChanged="rblType_SelectedIndexChanged" OnPreRender="rblType_PreRender" RepeatDirection="Horizontal" RepeatLayout="Flow">
<asp:ListItem Value="1" Selected="True">National</asp:ListItem>
<asp:ListItem Value="2">International</asp:ListItem>
</asp:RadioButtonList>

<asp:UpdatePanel ID="udpChannel" runat="server" ChildrenAsTriggers="False" RenderMode="Inline" UpdateMode="Conditional">
<ContentTemplate>
  <asp:DropDownList ID="ddlChannel" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddlChannel_SelectedIndexChanged"></asp:DropDownList>
</ContentTemplate>
<Triggers>
  <asp:AsyncPostBackTrigger ControlID="rblType" EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>

</form>

the RadioButtonList is rendered as:

<span id="rblType">
<input id="rblType_0" type="radio" name="rblType" value="1" checked="checked" />
<label for="rblType_0">National</label>
<input id="rblType_1" type="radio" name="rblType" value="2" onclick="javascript:setTimeout('__doPostBack(\'rblType$1\',\'\')', 0)" />
<label for="rblType_1">International</label>
</span>

You all can notice that the first radiobutton item has no onclick event. So, you're not able to verify if the first radio button item was clicked.

The only way to have a onclick event in the RadioButtonList first item was creating a workaround in behind code:

protected void rblType_PreRender(object sender, EventArgs e)
{
    rblType.Items[0].Attributes.Add("onclick", "setTimeout('__doPostBack(\\'rblType$0\\',\\'\\')', 0)");
}

I don't know if my approach is correct. Did anyone have the same problem?

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

hiddenkirby — Fri, 24 Aug 2007 17:46:58 GMT

In my page .. as a workaround ...i put the radiobuttonlist that i was using as the target... inside its own updatepanel and set it to autopostback = True.

Then by default all other update panels will update when another does if the UpdateMode = "Always". The whole page did not have to postback because it was contained in the update panel.

It may not be the solution for everyone, but it worked for me... and i didnt have to hack in my own javascript.

-Kirb

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

veloearl — Tue, 05 Dec 2006 16:58:07 GMT

I can now use a RadioButtonList.SelectedIndexChanged as an asnynchronous trigger for my update panel, but I am having a strange problem. If one of the items in the list is disabled, clicking on any of the items that come after it doesn't cause the async postback (or any postback at all). If all of the items are enabled, clicking on any of the items causes the postback as expected. RadioButtonList ListItems don't have a Visible property, so I have to use the Enabled property.

Any ideas?

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

kilik — Tue, 21 Nov 2006 15:54:38 GMT

False alarm...I'm actually seeing a different issue for which I will start a new thread.

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

kilik — Tue, 21 Nov 2006 15:18:00 GMT

I'm still seeing this in the latest release...is anyone else having an issue with this?

Thanks!

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

DamonC — Tue, 15 Aug 2006 22:52:38 GMT

I've made a small update to this which allows it to work in FireFox as well - this is the update (just one line has changed).

foreach (ListItem item in CheckBoxListDisplayOptions.Items)

item.Attributes[

"onclick"] = String.Format("javascript:setTimeout('__doPostBack(\\'{0}\\',\\'\\')', 0);", LinkButtonCheckBoxListHack.UniqueID);

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

DamonC — Tue, 15 Aug 2006 04:57:38 GMT

I had exactly the same problem - I've come up with a workaround which seems to work for me so I thought I'd share in case anybody else would like to implement it (I'm only targetting Internet Explorer as this is for an in house application - so I'm not sure if it will work on other browsers).

The approach I took was to add a LinkButton and added style='display:none;' - I set it's OnClick event to the function that I wanted the CheckBoxList to originally fire - so the LinkButton looks like this:

asp:LinkButton ID="LinkButtonCheckBoxListHack" runat="server" OnClick="RedrawGraph">HiddenCheckBoxListHack</asp:LinkButton>

This is outside of the UpdatePanel (as is the CheckBoxList).

I then added this to the Triggers collection for the UpdatePanel:

<atlas:ControlEventTrigger ControlID="LinkButtonCheckBoxListHack" EventName="Click" />

</Triggers>

I disabled AutoPostBack on the CheckBoxList (CheckBoxListDisplayOptions) and then in the code behind file I had to do the following:

LinkButtonCheckBoxListHack.Style[

"display"] = "none";

foreach (ListItem item in CheckBoxListDisplayOptions.Items)

item.Attributes[

"onclick"] = String.Format("{0}.click();", LinkButtonCheckBoxListHack.ClientID);

This seems to work well for a static CheckBoxList - if you are databinding then you need to handle the CheckBoxList's OnDataBound event and put the code in there:

protected void CheckBoxListGroups_DataBound(object sender, EventArgs e)

{

foreach (ListItem item in CheckBoxListGroups.Items)

item.Attributes[

"onclick"] = String.Format("{0}.click();", LinkButtonCheckBoxListHack.ClientID);

}

Hope this is of some use until this issue is resolved in future releases. It's not ideal to have to work around such issues but it seems to work well with no adverse side effects that I have noticed!

Re: RadioButtonList.SelectedIndexChanged as UpdatePanel Trigger

Garbin — Tue, 08 Aug 2006 23:00:15 GMT

Hi,

there's an issue with list controls like RadioButtonList or CheckBoxList used as trigger for an UpdatePanel. The full postback happens because the trigger registers the list container as an asynchronous control but the postback is fired by a child control with a different id. I've added this issue to the unofficial bug/issue list.