Web Forms :: Programmatically Load And Unload Into A User Control?

Mar 4, 2011

Is this possible and how?

I would like a single button that will fire a loading of a user control into a panel to simulate a wizard-type functionality.

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Web Forms :: The Control Collection Cannot Be Modified During DataBind, Init, Load, PreRender Or Unload Phases?

Apr 13, 2010

Public Class PMRADGrid
Inherits System.Web.UI.GridView
Private Sub PMRADGrid_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load


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Web Forms :: Load User Control In Page From Another User Control?

Jan 11, 2010

i have:

- Default.aspx;
- user1.ascx: 1st user control containing repeater;
- user2.ascx: 2nd user control containing a detail view of row.

In page.aspx i dinamically load the repeater inside a user1.ascx.

after i want to dinamically load the 2nd user control also in default.aspx by a button inside a user1.ascx.

How i can do this? I can't load user2.ascx inside user1.ascx but only in aspx page.

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Web Forms :: Trying To Programmatically Add A User Control To An Aspx Page

Nov 30, 2010

I'm trying to programmatically add a user control to an aspx page.

the problem is that any postback that happens on the page(even if i added the user control to an updatepanel) clears the user control from the page.

this happens also if the postback is generated from the user control itself.

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Web Forms :: Load User Control From Another User Control?

Apr 4, 2010

I have a Master Page and in it I have two user controls,User control 'A' and User control 'B'.

so A and B are in the Same MAster page,I have a Button on Aand when ever i click a button I want to Load Usercontrol B(Call its Page_Load) Method...How will i do that?

this is the code but i get an error at line 'C' --- Null Reference Exception was unhandled


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Web Forms :: Load Another User Control Using Vb

Apr 26, 2010

let say i have Two user control U1 and U2. I have a treeview control T1 U1 include a one datalist. U2 include a one datalist. I Place a U1 in a aspx file call home.aspx where i use a placeholder for dynamicly load user control. t1 is a treeview for menu so when i click on a parent item i load u1 in placeholder and when i click a child node in t1 then i can load u2 in place holder. Here u1 content parent data like product category. U2 content child data like product sub category. click t1 parent node load u1 and child node load u2 ok.but if a user click on u1 dataitem it also need to laod u2 and unload u1.

can it be possible? or if anyone can guid me how to use single page with multiple user control response each other event.

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Programmatically Adding A User Control In C#?

Jan 12, 2010

I have a user control that needs to load a child control when a button is clicked. The trouble is that it has to request the control from another class.

So in the button click event, I call the function to get me my control, and add it to the page, like this:

UserControl ctrl = ExampleDataProvider.GetControl(some params...);
The GetControl method looks like:
public static UserControl GetControl(some params...)
ExampleDetailPane ctrl = new ExampleDetailPane();
ctrl.Value = "12";
ctrl.Comment = string.Empty;
return ctrl;

This isn't working due to the page's lifecycle - the Page_Load of the child control gets fired and its controls are null.

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Web Forms :: To Load User Control Into Panel?

Jun 3, 2010

I created a user control called userCon.asxc.may i know how do i do when i click on button1,then the userCon.asxc will load into panel1?
I checked on internet, but found only those loading the user control to page when execute.What i want is to load user control into panel1 when button1 is click.thanks for reading.

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Web Forms :: User Control - Run Before Page Load Event?

Mar 3, 2010

I have a user control that will basically be a header in most of my pages, but not all. I want some code in the user control to be run before the page load event of the page that holds the user control, but the page load event fires before the events in my user control. Is there a way around this?

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Web Forms :: How To Load User Control Dynamically On Webpage

Mar 29, 2010

how to load user control dynamically on asp.net page? I am loading user control in my page_Init() event under if(!IsPostBack) but when user post the with any button click then my user control is disapper?

If i am loading control without if(!IsPostBAck) then its fine, but each time a page is posted loading of control is not good because it will slow my web site?

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Web Forms :: Load User Control On Button Click?

Feb 3, 2010

I have two user control..In one user control i have a button..if i press the button i want to load another user control

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Caching User Control And Clearing That Cache Programmatically?

Jul 13, 2010

I'm trying to cache user controls and on some pages i want to cache single objects. There are multiple ways of implementing caching, and my head is breaking over it.

The way I see the caching options now:

You have the PartialCaching option which is set to cache the control for 30 minutes, and after that it clears itself... You have the varyByParam to identity the page by its querystring paramaters... or other vary options

But i just cant find an appropriate way to add caching to a control, and be able to clear the caching programmatically when i update one of the objects used in the control from the backend.

You can do HttpContext.Current.Cache.Insert(), which accepts a key on which you can destroy the caching item later by using remove... This can save objects in cache but can you use options like varyByParam?

My questions are burnt down to two:

Is there a way to clear the caching on specific user controls from the code? If yes, can this be done according to the varyby options? How would the object caching respond to logged in users or anonymous users using Insert()?

EDIT: I'm caching multiple things.... And I'm really flabbergasted in which choice to make referring to caching. Can the Cache.Insert be varied by Parameters?

The main problem is peopling editing things from the backend, which needs to trigger an event that reinstantiates or clears all caching items referring that object.

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Web Forms :: Access Page Load Event From User Control

Mar 2, 2010

I have a page called "EDIT.ASPX" on that page it has come TextBoxes, Label and 3 User Controls. When the Edit.aspx page is loaded all the correction form Controls are loaded properly, even the User Controls loads with no problem. The problem that I am expericing is that on the User Control I have a CHECKBOX with AutoPostBack="true". Each time the user click the CheckBox the User Control disappear. NOTE: How do I fix this problem and eliminate my page control from vanshing. The user control needs to keep the same state as the Edit.aspx page when the checkbox is clicked. I need to be able to click the checkbox without loosing any data on the page rather it's the Edit Page or the User Control.

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Web Forms :: Load User Control Dynamically On Menu Bar Click

Jan 4, 2011

I am using 5 ,6 user control. I wanted to load diffrent user control on Click of menu bar. Means when I click on first link of Menubar 1 user control should load and 2 loaded when i Click on 2 link of menu bar. How to do that?

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Web Forms :: Dropdown Selected Value Of User Control On Page Load?

Jul 15, 2010

I have a function on page load which will work based on dropdown selected value. and I am using this dropdown in a user control. So getting problem because the dropdown value is not loaded yet before Page Load. How Can I do that using those control still.

Here is my code below.

public partial class GradeEntry : System.Web.UI.Page
StudentManager studentManager = null;
CourseManager courseManagerObj = null;
GradeManager gradeManager = null;


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Web Forms :: LoadControl To Load User Control Is Not Working On Another Computer?

Nov 1, 2010

I created a user control, then use LoadControl to call the user control in a web form. Everything is working fine on my computer. When my work is copied to another developer's computer, the content of the user control does not show. All other pages are working fine.

The only difference I could think of between my computer and another computer is the other computer use ajax-created master page. But this web form that calls the user control does not use any master page.

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Web Forms :: Improve The Performance Of Dynamically Load User Control?

Feb 16, 2011

how to improve the performance of dynamically load user control

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C# - Child Controls Are Null When Loading User Control Programmatically?

Feb 11, 2010

I'm loading a user control programatically like this:


The problem I have is that all the controls in my user controls are null, is there something else I have to do to load the child controls?

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Web Forms :: User Control Accessing The Parent Page Load Event?

Mar 4, 2010

I have an EDIT.ASPX page and on that page I have some labels and textboxes and a user control. I listed all the related codes you can have a clear picture - not all of the codes are given me a problem. ONLY ONE.

HELP ---> On the Uer control (SiteTemplate2.ascx) I have a DataList that is being populated by the database and that works fine. I have a
CHECKBOX on the user control page each time the user check the CHECKBOX the user control content totally disappears from the EDIT.ASPX page. There is no error message -- I believe this is a post back error but I don't know how to fix it.

Goal: Each time the checkbox called (CHKBSideBar) is clicked on the user control page all of the page content should stay in place that include

EDIT.ASPX Page and the refeneced USER CONTROL. I should be implement a CheckedChanged Function without either of the pages lossing DATA. I need to be able to access post back event from the user control of the Edit.aspx page. When the user click a box on the user control page how do I keep the same Page_Load event on the edit page. I need to reference the Edit page from the user control.

Note: The edit page loads the user control (SiteTemplate2.ascx)SEE CODES BELOW

I know this is a lot and thank you in advanced for your help. I tried to include all the pages that are key players. I must user the user control bacuase the user can select different template so eliminating the user control is not an option.


The user control is being referenced from the web.config file ** Works find! **


EDIT.ASPX Page **-- WORKS FINE!** [Code]....

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Web Forms :: Css, Master Page And Web User Control - Background Image Does Not Load?

Apr 26, 2010

I have a stylesheet attached to a master page and a web user control attached within that master page.

here is the css code


background-image: url (image.jpg);

in the master page, i create a div inside the made called "searchBox". Then, I have a web user control inside that div. However, my background image does NOT load. How can I resolve this?

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Web Forms :: Load JavaScript File Dynamically When User Control Is Loaded

Jun 17, 2013

I have a tab control on my page  and on click of tab  user control is loaded dynamically.I need to load the javascript file  of that user control dynamically. I don't want to add the reference of my js file on parent page.so in my .ascx page load event i added:

System.Web.UI.HtmlControls.HtmlGenericControl js = new System.Web.UI.HtmlControls.HtmlGenericControl("script");
js.Attributes["type"] = "text/javascript";
js.Attributes["src"] = "../../js/DatesJavaScript.js";
but it is not working.

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C# - Adding User Control To Page Programmatically While Preserving Controls Already Present

Mar 25, 2011

I am trying to add a user control into a div at runtime. I can add the control no probelem but it overwrites the previous control added.Basically, I am trying to add passengers to a travel system - the passenger details are in the user control and I don't know in advance how many there will be. I have an add new passenger button which should append the new user control into the div without overwriting the previous passenger. The code is c#/.net 4. I have tried to save the control data into viewstate and re add it with the new one but that also doesn't work. Here is a snippet of the code I'm using

foreach (Control uc in p_passengers.Controls) {
Passenger p = uc as Passenger;
if (p != null) {

however, p.SaveAs() (just writes the control values into ViewState) is never hit.

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Forms Data Controls :: Dynamically Load User Control Based On The Count?

Mar 17, 2010

Im working with asp.net web application,I need to get multiple gridviews dynamically based on the count (which i get from database) for that i took a web user control and i added a gridview there . iwant to load that usercontrol in aspx.cs based on the count..

but im able to bind only one grid view...

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C# - Load User Control Given Its Type?

Mar 5, 2011

Is there a way to instantiate and use a usercontrol (.ascx) if given you have its Type (ie. typeof(MyUserControl))?With regular asp.net controls like a textbox or a dropdownlist you can just make a new instance and add it to a controls collection. This doesnt appear to work for User controls. While you can make a new instance and add it to a collection, and have all of its events fire, it will not actually render to the page. Typically you would call Page.LoadControl() with the path to the .ascxThis presents a problem if all you have is its type. How can you get the path to the .ascx to give to the LoadControl method. Ideally I would also like to not have to have a reference to the Page object

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Load User Control Using AJAX?

Jun 18, 2010

I just want to call a user control using AJAX and get the rendered html of the control. However, when I try and fetch the control I get the following error message:

This type of page is not served.

Description: The type of page you have requested is not served because it has been explicitly forbidden. The extension '.ascx' may be incorrect. review the URL below and make sure that it is spelled correctly.

Requested URL: /Controls/ClientFormControl.ascx

Is it possible to make this type of page servable, or is there a specific way you need to call it? I know such things are easy in MVC frameworks...

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