What I want to do is this:
I prevent FormView from binding data when page loads,but when button clicked I'll fire event to bind FormView using ajax.
Is this possible in .NET 4.5 ?
Binding takes place at the server. A FormView is a Server control. So, no.
You could use an UpdatePanel to avoid a full page refresh, but many developers look on the UpdatePanel with disdain.
You could use one of the many jQuery libraries (jsRender is one) to populate an html table using jquery.
Related
I have a ASP.Net(C#) page. When a user selects a value in dropdownlist, some new controls will be visible to him.
I am able to that now, but the page has to reload every time and state has to be maintained between postbacks.
Is there any way to do the same without reloading of the page in a easiest way possible without using ajax control toolkit?
Additional info: the data for the dropdownlist is coming from the database, and some places it has to be all server side so i can't use javascript .
You can try this idea: http://msdn.microsoft.com/en-us/library/ms178208(v=vs.100).aspx. I have not try it before but it seems logical.
you should go through updatepanel. Put all the controls inside a updatepanel which you want to show on selectedindexchanged event of the dropdownlist and write code behind on selectedindexchanged event of the dropdownlist accordingly. Hope this will help you...
Basically I have created a user control containing a Telerik RadGrid, inside the control I have another two controls that have Telerik RadGrid inside them. I am trying to bind the modified data back into the User Control inside the parent user control. I have checked that the data is correct after they have been edited but when the form is binded again the inner controls have the same data as the form is first loaded. I am using RadWindow. Coworkers have suggested that it works with asp.net form controls however it seems that there is an issue with Telerik controls. Is there a easy way to force a rebind of the control?
There is a Rebind() method you can call to enforce this. This method causes the refresh and reloads the data and calls NeedDataSource.
If I drag and drop a GridView and an ObjectDataSource onto a page, hook them up, pull in some data and let the controls handle everything automatically where is the code that tells the controls how to behave?
The server controls that you add to an aspx files are represetations of classes in the .NET framework that contain all the logic which is relevant to the controls behavior.
We want to show Some fields of table in Detail view layout and want to update every fields individually. can we do this in asp.net
Use UpdatePanel and ScriptManager.
See here for details:Introduction to the UpdatePanel Control
Make use of AJAX that will do the task for you ...
You can make use of AJAX-Toolkit control UpdatePanel to do the partial update of your page. Also check : Implement ASP.NET AJAX with the UpdatePanel control
I'm working on developing a custom control to select items from a predefined list. This is accomplished via 2 ASP.NET ListBox controls, with a few buttons to trigger the movement of ListItems from one ListBox to the other (lets call these ListBoxes lstSelected and lstDeselected).
This is easy enough to do in ASP.NET or JavaScript independently: I have both working. However, if modifications are made via JavaScript, ASP.NET retains no knowledge of this. Is there any way to register the creation of of options in a select tag without AJAX?
You could also do this with traditional postbacks, it doesn't have to be ajax. The postbacks would be triggered by clicking your buttons which change which items are in which listboxes.
You could have a couple of hidden fields, say hdnHasSelectedChanged and hdnHasDeselectedChanged, and set those fields in your javascript code. Then, when a postback really happens, your code-behind can read those hidden fields to detect if changes occurred.