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
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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.
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.
I'm using VS2008 to develop my ASP.NET web site, I know how to use AJAX and update panels to perform partial page refresh, but is there any way that I can do the reverse action? i.e. can I use update panels to prevent some controls from reloads? I have a control which I don't want to be reloaded in page reloads, it is located in my master page as it should be active in all pages, what are my options now?
thanks
Try using UpdateMode property of update panel to Conditional..
When UpdateMode set to Conditional, the UpdatePanel will be updated only on postback originated by controls inside the panel or from the triggers specified.
for more info:
http://codeclimber.net.nz/archive/2007/05/24/updatemode-default-value-for-the-updatepanel-is-always.aspx
http://ajax.net-tutorials.com/controls/updatepanel-control/
Regards.
I dynamically load a User Control, with an Update Panel inside a Place Holder.
When I click a button from the User Control, should refresh the Update Panel contents, but it refresh the entire page instead, and the User Control is disappearing from the page, because the page's Page_Load does not load anything if it's a PostBack.
How I can fix it?
Whenever a partial or full postback happen , Automatically all update() method of all updatepanels fire . For preventing such this behavior you need to set UpdateMode="Conditional" property . In this situation you need to specify asynchronous trigger Or ChildrenAsTriggers=true .
for preventing a dynamically loaded-usercontrol to be disappear ,It's good to save it in ViewState , Here is a tutorial and sample application
I think you'll need to reinject the control in page_load or pre_render. Dynamically created controls don't live through postback.
Make sure you are creating the control EVERY page request, regardless of GET/POST. Also, make sure you are giving it the same ID.
I like to override the CreateChildControls method.
You need to add the control page to the page in the page_init method. It has to be added on each post back. The control will retain all the values even after adding it back.
There is a full working example at this link.