User Control - Control Library - Elements Not Instantiated?
Apr 28, 2010
I have created an asp.net application which contains a user control. Within the application this control works fine. I have then moved the control into a separate "control library" project. When I try to load the control from the control library I find that the asp elements defined in the ascx for the control are not instantiated - i.e. I get a null reference exception in the Page_Load event handler. The only changes that I have made to the original application are to reference my control library and to change the <%@ Register statement in the loading page to reference the control library dll:
[Code]....
Do I need to do something else to get the user control to initialize itself correctly?
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Oct 15, 2010
This JQuery datatable is present in one of my webuser control named "LeftVerticalLayOut.ascx". I am dynamically instantiating Webusercontrol on click of a link button. This link button is bound with the trigger event of Update Panel control.
So clarifying once again : I have one UpdatePanel which I am triggering with Link button("lnkLoadControl") . On click on "lnkLoadControl" I am able to load Usercontrol("LeftVerticalLayOut.ascx") onto the updatepanel. Now the jquery datatable I am creating in load event of Usercontrol is getting generated.
After the datatable(having id as "example") is created, I am calling the below code in my
function loadHandler()
{
Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
}
[code]...
Now as I am creating the UserControl on the fly, the Jquery in not getting applied.
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Mar 30, 2010
i created a user control that has a template container.
[code]....
This is control is placed in a repeater which lists some customers. The customer is than bound to the user control. When the name template is instantiated in the container, the customer object is not yet available, but I need to access its name because it needs to get parsed before.
[code]....
Question: How can I access properties set for the user control BEFORE the template container is instantiated?
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Feb 24, 2010
I just browsed and tried to find a good example changing a web user control(ascx) to a web control library. I used some javascript, Css and images for the control and i need this fiels to be build to my web control library. The answer I get it is not sufficient.
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Dec 8, 2010
I just recently started messing around with .NET (converted over from PHP) and I'm really enjoying it. I've created a test site for some friends at work and it works great. But I've been slowly converting the pieces of the site into user controls. I've moved some DataGrid elements to user controls for their specific purposes, and now I'm working on the main page (I'll attempt to copy the code below).
So pretty much this control displays:
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[Code]....
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Jun 30, 2010
I've got a custom ASP.Net web user control I've built; done this enough times before but this one is misbehaving and I can't spot why.
Where the calling page includes the user control directly in its markup, all is well and the control behaves as expected.
However if the page adds this particular control dynamically (to a placeholder in the master page, which is what's calling this whole thing) the elements within it stay firmly NULL - nothing from the user control gets written to the client at all, including static content within the user control.
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Aug 17, 2010
I have a web user control menu of page. Now I want HOME (which is an hyperlink text) in menu to be Bold at the time default.aspx Loaded (Load event)! How can I do that If any one can provide code! I am using VB .Net at back.
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Feb 1, 2010
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Edit:I tried to do this:
Type type = Type.GetType("Control_Library.Report_NumberDDL");
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Sep 17, 2010
I have created a class library in which i m having Web Forms.now when i use this dll in ASP.NET websiteand call methods
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List<CustumFields> objlist= new List<CustumFields>();
obj.CheckModule("admin", "password", "Testing102", objlist);
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this.components = new System.ComponentModel.Container();
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this error occurs at .this.webBrowser1 = new System.Windows.Forms.WebBrowser();
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Jun 4, 2010
I don't think I understand fully how ASP.NET does inheritance of controls.I have a user control, ucBase, which has an asp.net label in the ascx file. Code behind references the label and it works fine during run time if the control is not a parent for another user parent.
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Jul 22, 2010
I have created user web control library project and these controls i'm using in my web application. These User controls just works fine in my local machine but when i moved this project(including Library) to our Local server , it is throwing security exception
Error 1 Cannot register assembly "LocalServerLibraryDemoLibraryDemoLibraryinDebugLibrary.dll". Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. Library
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Sep 10, 2010
I've got a web site that has a master page and that master page (mpMaster that has a user control ucControl1) which has a sub user control (ucControl2), this user control has a property which accepts a value. Now, I have a page that uses the master page
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Feb 17, 2011
I am trying to assign user control from another user control ..first time its binding control successfully but when we refresh the data its giving error
saying "Object reference is not set an instance".
how to refresh data from another user control ...
My senerio below :
1 Aspx page
2. User control
calling usercontrol databinding method from aspx page but once it get refreshed ,not allowed to bind it again..
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Feb 18, 2011
I'm attempting to create a simple menu user control just as outlined here.
The attached code results in an "Object reference not set to an instance of an object" error, but I can't figure out why.
<%@ Master Language="VB" CodeFile="MySite.master.vb" Inherits="MySite" %>
<%@ Register src="Controls/Menu.ascx" tagname="Menu" tagprefix="my" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">......
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Jun 11, 2010
I have to access the parent form's controls inside an event handler method on my user control's code behind.
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Mar 10, 2011
I have a web user control that represents a simple message box. It is used to display simple messages like "Item has been deleted", or "The item was saved successfully".
On the other hand, I have another web user control that represents the item in the form of an editable form (I made this a user control because this is used in two different pages). I want to embed an instance of the message box user control inside the editable form. I am writing this right after the @Control directive:
[Code]....
Instead of using @Register directives, I register the user controls in web.config and so far this has worked just fine.
With the above markup, the project compiles, but whenever I try to navigate to a page that contains this construct, I get an HttpParseException exception. Furthermore, Visual Studio states that the tack w7rc9:MessageBox doesn't represent a known control.
What am I doing wrong?
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Jan 26, 2010
How can I control on HTML elements by using C# code in asp.net pages.
For example:
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Sep 16, 2010
how user controls can communicate with each other within an asp.net application. I am facing many obstacles at the moment regarding this problem. For example, is it possible to set the visible property of a panel on one user control based on what happens in another?
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Jul 16, 2010
I want to convert windows user control into web user control..I have the usrDataView.cs..I need to convert this file into usrdataview.ascx.can anyonr help me?...how I can convert the file...Is any method is available..
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Jun 3, 2010
have two user controls on one aspx page. UC1 has a grid which contains a link button column which user clicks. Based on the value of clicked cell, I need to show some data into UC2.How do I pass data from UC1 to UC2? How do I invoke a function of UC2 from UC1?
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Apr 16, 2010
All I would like to be able to do is include one user control within another! Is this possible? I have spent the last hour searching the internet and it seems that I can't find a single thing.
In classic ASP it would be something like:
<!--#include file="EditProject.ascx"-->
I tried this but no luck!
Parser Error Message:
There can be only one 'control' directive.
Source Error:
[Code]....
Line 1: <%@ Control Language="VB" AutoEventWireup="false" CodeFile="EditProject.ascx.vb"Line 2: Inherits="Controls_WebUserControl" %>Line 3: <form runat="server">
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Mar 5, 2011
It's simple to create both user control from the two world : ASP.NET+Razor or MVC 3.0.But i do not known how to consume the user control FROM the razor"_layout.chtml" page.I want to put such thing within the layout page: <uc:MyTag Prop1="" Prop2="" />So i need to declare this directive at top of the layout file : <%@ Register TagPrefix="uc" TagName="MyTag" Src="Controls/Mytag.ascx" %>
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Feb 1, 2011
i have two user controls uc1 and uc2. uc1 as button and uc2 has label, so default.aspx contain both uc1 and uc2, How can i change value of label by clicking on button??? remember both are in the different user control.
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Dec 6, 2010
I just found out that there is sort of a neat control called the "Menu-control"..but the thing is that I actually whould need my menuitems to contain more then just a plain text link..
I whould need it to out put something like this as my HTML:
[Code]....
This since I whould need to style my menuitem abit different..is this possible..and how?
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Mar 25, 2010
To start with a concrete example, I'm just moving the logon link control from the default MVC2 app to a library called WebUtilities. In the web app, I've deleted: view/account/LogOnUserControl.ascx and instead implemented the following class in the WebUtilities project:
public
class
Ctrl_LogOnLink :[code]...
Then in the site.Master where it is referenced, I've replaced
<% Html.PartialRender("LogOnUserControl") %>
with
<%@ Import Namespace="WebUtilities" %>[code]...
This sort of works, except the content of the control is not rendered (if debugging, RenderView is not called). If in the control constructor, I use "Controls.Add(new Literal...", that will load some control content, however the Control's base is not initialized,
so if I reference the Request.IsAuthenticated in the constructor, the control throws an exception. how to implement the control in a library? Also, if the control is based on the ViewUserControl<Model>, how do I set the Model?
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