I have a repeater inside which I have asp.net radio button control. I want to group these radio button so that at a time only radio is selected.
I know that this can be easily achieved by writing a JavaScript function but I want to make this work even if JavaScript of browser is disabled so I need to write something at server side. How can I do that?
Related
I have a radiobutton list and three placeholders in my page, out of which the radiobutton list,first and third placeholder are within updatepanel, second placeholder is not within updatepanel.
When radiobutton list selectionindex is changed, I want all three placeholders invisible. Placeholder2.visible=false code executes but still Placeholder2 is visible.
How to resolve this.
Thanks,
Viknesh.A
You should put all your placeholders in update panel on reload the page when the radio button hits (full post back) by setting AutoPostBack="true"
You should understand that by default changin radio button on a client only affects client html, so you need to pass that info to server.
Another option is to have client onclick for radiobutton and write your custom javascript function to hide your second placeholder, but don't forget to manage that situation on the server as well, when postback (either ajax or not) will occur.
Move Placeholder2 inside the UpdatePanel.
Or don't use an UpdatePanel at all.
Or use JavaScript to hide it, instead of server-side code.
I have a gridview inside a User Control which is being filled with data from a data source dynamically. One of the things I need to support is switching a non-data-bounded column from checkbox column to radiobutton column dybamically.
everything's cool when I create the columns for display, but when I try to add an event to the CheckChanged (or Click) of the columns, the events doesn't fire - Not at AsyncPostBack and not at full postback. Moreover, the AutoPostBack is set to true and the checkboxes and radiobuttons do fire the postback, but not their events.
I don't think it's relevant, but the loaded usercontrol is in a ModalPopUpExtender from AjaxToolkit and it is being showed at server side (using a dummy button, and a clickable button ith a server side event on click). Also, all the ModalPopUpExtender controls are inside of an UpdatePanel, and only the clickable button is not.
thanks in advance.
I'm not sure if it'll work using Ajax and ModalPopUpExtender but I think you need to handle it in the OnRowCommand event of grid.
So, the column of the checkboxes should have been added in a static sort of way (declare the column and the checkboxes/radiobuttons in html) - the page would register to the events, or needed to be registered in PreRender of the GridView, after acknowledging that they were added during an Ajax postback... the latter is the best way... but for those who have no time to debug, first way is better. see also:
http://www.codeproject.com/KB/custom-controls/asp-ajax-custom-controls.aspx
I am using a GridView with its first column as a template field with radio buttons.
I need to make the first radio button in the first row of the grid remain default selected during page load / postback.
How can this be done?
Read this:
http://www.asp.net/data-access/tutorials/adding-a-gridview-column-of-radio-buttons-vb
The heading titled "Using a Literal Control to Inject Radio Button Markup" may be of particular interest to you
i have created Array of Linkbutton
and when user click on link button it will create an array of Radio Buttons
but it requires Postback all time so page load takes more time...
what is solution of it??
Use asp.net Ajax update panel.
Put link buttons and panel/view (or what ever control you are using ) update panel.
I am not sure if I am following a 100% but if you don't want to do a post back then your going to need to write some javascript(or use a framework like jquery) to generate radio buttons when the user clicks the link button(plus you probably don't want to use a link button then as it will try to always cause a postback or you will need to stop the post back from happening).
I have a ListView on a page that displays a list of widgets. When a user clicks on one of the items in the list, I want to display a ModalPopup that contains controls allowing the user to operate on the item they selected.
I could easily accomplish this by placing a Panel and a ModalPopupExtender in the ListView's ItemTemplate, but this mean one set of hidden controls for each and every widget, which would massively bloat the page size. (There are going to be some rather heavyweight controls in there.) Instead I want to reuse a single ModalPopup for each of the widgets in the list.
I've done some searching but I haven't found anything that applies directly to my situation before. From what I've been able to figure out, however, I have to do something like this:
Place a Panel and a ModalPopupExtender on the page inside an UpdatePanel.
Build a custom WidgetManipulator user control that has a WidgetID property. Put this in the Panel, along with a couple OK/Cancel buttons.
In Javascript on the page, attach a click handler to each widget in the ListView that triggers a postback on the UpdatePanel.
On the UpdatePanel_Load event on the server, display the ModalPopup and then set the WidgetID propety on the WidgetManipulator to the ID of the clicked widget.
On the OKButton_Click event or CancelButton_Click event on the server, hide the ModalPopup. If OKButton was clicked, call WidgetManipulator.SaveChanges() first.
The part I haven't figured out is: How the heck do I know what widget was clicked on, and how do I pass that back to the server when I refresh the UpdatePanel? Is this even the right approach at all?
If you can use jQuery instead you could do something along the lines of these two posts:
Modal Delete Confirmation Version
Two Using jQuery SimpleModal Plugin
Demo
Inserting Content Using
jQuery SimpleModal Plugin Demo
When I need to pass data from client to server in ASP.NET AJAX, I generally use an asp:HiddenField with runat="server". Both can see it freely, but beware potential postback asynchronicity.
Sounds like you need to notify the server the widget was clicked - You may use a Timer to postback; or I'd go with option 5.