Page contains four grid with same no of columns.so, i have created a usercontrol which i am dragging four times on my page so it has created. uc1:grid1,uc1:grid2,uc1:grid3,uc1:grid4.
This means after rendering it will fetch four grids from the server. So If i create a grid & using Jquery .clone() i.e $(grid).clone() If i create 3 clones I can reduce server overhead. Is there any problem using this method?
If after cloning you need other data manipulation like changing headers and CSS and stuff like that, then sticking to your server code is more reasonable. But if you have 4 identical grids, int both structure and data, and they all have the same styles, then choose clone() method.
Related
The question in a nutshell: Is there a way to add forms dynamically to a aspx-page? I know how to add controls to an existing form, but how to add a whole form?
Bckground:
I am "forced" to work in Visual Studio 2008 and I want to create a controller, which builds a page depending from the list of elements a model gives it (e.g.: the list may contain a paragraph, an image, another paragraph, a parapgraph again, a form and so on).
This works fine for the first examples as I am able to add them to the inner-html of a div-container.
Thinking about ways to generate a form like this (innerHTML += form), I feel I'd be throwing the few possible advantages ASP I can see (compared to PHP) out of the window in terms of input validation and so on. But I can't find a way to generate a "real, server-run" form. The same goes for gridviews, but I guess the solution may be similar.
A possible workaround would be to create an empty form
<form runat="server" id="dummyForm">...
and add controls to it dynamically. The obvious(?) downside to this would be, that I couldn't change its position (at least I wouldn't know how) in relation to the other content elements.
Another downside would be that I would be limited to one form per page and that may or may not be sufficient. If it wasn't I would starting to add several empty dummy-forms and would start indexing them and all of that doesn't look very cool to me.
Is there a more elegant way to a solution?
TIA
Simon
You can't add more than once server side Form tag in single aspx file
(in run time or design time)
maybe this article help you to generate dynamic forms :
https://msdn.microsoft.com/en-us/library/aa479330.aspx
I'm creating a new unordered list as follows:
Using htmlUL As New HtmlGenericControl("ul")
End Using
Before closing the 'Using' clause, the list has to be added in a parent control:
Using htmlUL As New HtmlGenericControl("ul")
'Some Code Here
parent1.Controls.Add(htmlUl)
End Using
Everything works fine until i add my control to more parents :
Using htmlUL As New HtmlGenericControl("ul")
'Some Code Here
parent1.Controls.Add(htmlUl)
parent2.Controls.Add(htmlUl) '<--- Only gets added in the last parent's collection
End Using
This behaviour is expected because every control is unique. But i need to add this list to more than one parents (it does not include any static ids in order to avoid conflicts)
ASP.NET does not support scenario like the very same control object used in several places. The reason here I believe is the problem with identification of the control later in the page life cycle - this control would have to render under different parents, and with different IDs, etc. Looks like a very complicated and dangerous use case.
However there are several workarounds written here and there to clone controls on the page. For example checkout these threads: Copy/Clone Control, A Custom Copy Control - Copies Any ASP.NET Control.
All that beign said, in your case the easiest thing is just to create new list for each parent control. You do not need to copy any specific properties or data whatsoever, so no need for cloning overhead done in the solutions above.
I'm maintaining an ASP.NET site where users can log on to register some set of data (for statistical purposes). One user registers data for a set of units, and for each of these units a set of forms are to be filled out (with a handful of fields in each form, but that doesn't matter here). One scenario is that a user has 12 units, and in each of these units there is 25 forms to be filled, meaning a total of 300 forms.
The ASP.NET page for registering these data is made the following way: each form is in a panel that can be collapsed using an AjaxControlToolkit CollapsiblePanelExtender, and all forms in a unit is inside another panel that also can be collapsed. The result is that you have a tree view-like structure with the units on the top, and under each unit you can expand a set of forms, and further each form can be expanded to fill data (the page is loaded with all panels collapsed by default).
The page is generated completely dynamically (as forms can be added in a database), and for generating the CollapsiblePanelExtenders I have the following code:
private CollapsiblePanelExtender GenerateCollapsiblePanelExtender(string id, Panel headerPanel, Panel contentPanel)
{
CollapsiblePanelExtender collapsiblePanel = new CollapsiblePanelExtender();
collapsiblePanel.ID = id + ID_COLLAPSIBLE_PANEL_POSTFIX;
collapsiblePanel.TargetControlID = contentPanel.ID;
collapsiblePanel.CollapseControlID = headerPanel.ID;
collapsiblePanel.ExpandControlID = headerPanel.ID;
collapsiblePanel.Collapsed = true;
collapsiblePanel.BehaviorID = collapsiblePanel.ID + ID_BEHAVIOUR_POSTFIX;
return collapsiblePanel;
}
With one user having 12 units each with 25 forms, this means a total of 312 CollapsiblePanelExtenders. As I said, they are all set to be collapsed by default, but here's the problem:
When the page loads, they all appear to be expanded, and then the browser "starts collapsing them". This however takes a very long time (in Firefox I even get a warning about an unresponsive script, IE and Chrome only takes forever but without the warning). When all the "collapsing" is complete it works smooth to open and close single panels, but users have complained about the extremely slow initial loading.
So my question is simple: is there a way to optimize this so that the loading goes smoother? Is it for instance possible to only load the header panels in each CollapsiblePanelExtender initially, and then load the content panel asynchronously in some way?
One final clarification:
I know I could simply change the design of the page to only include one unit and thus reducing size of the contents drastically, but I hope to avoid this (users prefer the way with everything in one page). It would also mean a rather large change to the logic of the page (yes, I know - it's a poor code base at that point)
After asking some more around other places, I finally managed to solve this issue. The solution was to skip the CollapsiblePanelExtenders altogether, and instead use jQuery to handle the collapsing/extending.
In my structure, all header panels use the css class HeaderPanel, and all content panels use the css class ContentPanel (all of these are hidden by default). I can then use the following script to handle all the collapse/expand logic:
<script language="javascript">
$(document).ready(function() {
$("div.HeaderPanel").toggle(
function() {
$(this).next("div.ContentPanel").show("slow");
},
function() {
$(this).next("div.ContentPanel").hide("slow");
});
});
</script>
The solution was really quite simple, and it works like a charm! The collapsing/extending is soo much smoother and nicer than what it looked like when I used the CollapsiblePanelExtenders, and the page loads really fast as well :)
How to create a web control which will contain exactly two containers in ASP.NET 3.5. Like always exactly two columns (divs). I know default way allows you to have ControlCollection by overriding CreateControlCollection() method, but whis allows you to have only one container (or variable number of containers). Is there a way to always have exactly two containers in web control?
I want to archive something like this:
<MyControl>
<LeftContainer> ... </LeftContainer>
<RightContainer> ... </RightContainer>
</MyControl>
There is no way to do it in ASP.NET 3.5
I have 2 components for example (editor.mxml using mx:windows), when I click an edit button, I want to get the current value from the other component's datafield? (datagrid.mxml using mx:window)
I do know how to access the main MXML's datagrid by parentDocument or Application.application method, but stumped block if I want to access other way as mentioned above. Keep the code as simple as possible.
You could either do dependency injection, that is, give component A a reference to component B so that they can communicate directly (example of tighter coupling,) or have both components communicate through a common mediator using events (example of more loose coupling.)
Both of those options would be implemented wherever it is that you're creating those components (A and B in this example) and adding them to the display list.
This might be more complicated than it deserves, and it smacks of Pattern-Fever, but you could use a mediator class that listens for the CLICK event from the button and knows enough about the other component to query its property. It could even transmit that data using a custom event, which the button listens for.
While this involves three classes instead of two, it often turns out to be easier to have two components that focus on looking good and one that worries about coordination.
Cheers
Try this:
FlexGlobals.topLevelApplication
This points Your root. From the root You can grab every element You want.
You can also add an id to the custom component like this,
<custom:Editor id="myCustomComponent">
</Editor:AddressForm>
and
access your datagrid's value like this,
var data:ArrayCollection = myCustomComponent.DatagridID.dataProvider;