Web Forms :: Get List Of Custom Properties Of User Control?

Sep 15, 2010

With following code, I can fetch all properties of user control. I need to get only those properties which were separately defined excluding the default ones.


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namespace ServerControl1


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I want to use a couple of instances of the same control on a page. The user control is intended to display a list of records in a repeater. The aim is that the second control will show a list excluding the IDs in the first control The control has a number of public properties, including IDsInThisList, and IDstoExclude. The query will exclude the IDs in the second property.

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I have a test page where I am setting the properties of the controls in code. As you might guess, it's not working! The first control displays the top 3 items, as desired, but the second display the records 1-7, rather than records 4-10 because it is not receiving the IDstoExclude from the first control When I response write the IDstoExclude from the first control in my testpage, the string is empty. (if I do it from within the control, it shows the IDs)

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Screen grab of test page + uc and test page code attached


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Namespace Domain
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Then in my views I do something like this

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I have a user control (i.e. ascx) that comprises of two related list boxes (i.e. once you change the selected item in one list the contents of the other list update). I'm adding this user control dynamically to a page on the click event of a button (i.e. using LoadControl).I wish to set the list box datasource properties, as well as the default selected item of the parent list from my parent page so I created public properties in my user control to accomodate this. I also created an event in my user control that notifes the parent page when the selected item changes in one of the list boxes so I can update the contents of the other list box.

I understand that I have to recreate the user control on every postback in order for it to function correctly but I'm not sure exactly how I should be doing it. I've shown below what I have currently - whilst it works the problem is that on postback I'm always creating the user control with all its default properties and then updating the properties that need to change(?). For example, when the choice in theparent list box changes the datasource of the list box is set twice (once in AddControl and then again in OnParentChanged)? As the contents of the list boxes originate in a database it means I'm making unnecessary calls to the database (unless I do some something like store each unique set of data in the ViewState).

I'd be very grateful if someone could review how I've done things and illustrate how perhaps I should be doing things. I'm not sure if the way I've done this is considered the 'correct' way. For example there may be a better way of doing things would avoid setting the properties twice? I'm a bit unsure of the way I've set the datasource properties of the list boxes and bound them. I wished to set the datasource from the parent page because I might have a second user control on my page that may also use the same datasource and I could reuse it (as opposed to each control making its own call to the database) so I'd like to keep this feature if possible.It would be great if posting code in reply that you use my example as a guide so I know what you're referring to.Here's the code for my user control:



Here's the code for my containing page:


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I have a webpart that loads in a user control programmatically. Although the webpart has personalization properties that I can use and pass to the user control, I haven't found a way for the user control to be able to update the outer webpart's properties -- the user control knows nothing of its parent webpart except what it is given. When I try to use the [Personalizable] attribute on a property inside the user control, it doesn't work; it doesn't save anything to the personalization database. In a nutshell, I need the user control to be able to personalize its properties (e.g. for a date picker within the user control where the date has to be remembered between sessions) or to somehow be able to update its parent webpart's properties.

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Web Forms :: Change The User Control's Properties From A Content Page?

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I have a master page with a user control on it. How do I change the user control's properties from a content page?In my ascx file I created this 2 property:


In content page PageLoad event I wrote


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Web Forms :: Changing User Control Properties In Aspx Pages?

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I have a simple user control(.ascx) with a asp label inside of it. Using the codebehind(C#) from a aspx page, how can I change the text of that label? I have tried using public classes in my user control and a few other things that I could think of off the top of my head. Can somebody give me a quick example of how this would be done?

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As a starting point for creating custom controls, I would like to make a control that simply displays a number. If we imagine the .ascx file contains nothing except for a literal control, and the code behind sets that value to 1.

I then want to be able to do myControl.increment();
This will run some javascript that increases the value of the literal control.

I could inject a javascript into the page, such as pseudocode:

scriptything.register("function increment(x) { $('#myLiteral').increment(); });

or something, but that wouldn't be myControl.increment, that would just be increment(). More than one control on the page would screw it up.

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May 21, 2010

I've been working on this project for a few days now, and have been unable to resolve the issue of getting intellisense support for my custom-defined inner properties for a user control (ascx, mind you). I have seen the solution to this (using server controls, .cs mind you) many times. Spelled out in this article very well. Everything works for me while using ascx controls except intellisense. Here's the outline of my code:

public partial class styledcontrols_buttons_BreadCrumb : System.Web.UI.UserControl
public List<BreadCrumbItem> BreadCrumbItems
get { return _breadCrumbItems; }
set { _breadCrumbItems = value; }
protected override void AddParsedSubObject(object obj)
if (obj is BreadCrumbItem)
BreadCrumbItems.Add(obj as BreadCrumbItem);
public class BreadCrumbItem : ControlBuilder
public string Text { get; set; }
public string NavigateURL { get; set; }
public override Type GetChildControlType(string tagName, System.Collections.IDictionary attribs)
if (String.Compare(tagName, "BreadCrumbItem", true) == 0)
return typeof(BreadCrumbItem);
return null;

Here's my mark up (which works fine, just no intellisense on the child object declarations):

<%@ Register src="../styledcontrols/buttons/BreadCrumb.ascx" tagname="BreadCrumb" tagprefix="uc1" %>
<uc1:BreadCrumb ID="BreadCrumb1" runat="server" BreadCrumbTitleText="Current Page">
<BreadCrumbItem Text="Home Page" NavigateURL="~/test/breadcrumbtest.aspx?iwentsomewhere=1" />
<BreadCrumbItem Text="Secondary Page" NavigateURL="~/test/breadcrumbtest.aspx?iwentsomewhere=1" />

I think the issue lies with how the intellisense engine traverses supporting classes. All the working examples I see of this are not ascx, but Web Server Controls (cs, in a compiled assembly).

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Custom Server Controls :: List Property Of A Custom Control Is Not Persisted?

Mar 15, 2010

I have a custom control, inherited from Button. This is the class definition for the control and 2 properties:


I show you 2 properties, only to illustrate the problem.

as you see Aplicacion property is of a custom type Sistema, and Roles property is of type List<UserRol>.

The Aplicacion property is rendered well, this way:


The problem I have is with List<UserRol>. I couldn't get it to be rendered. I expeect to be rendered this way:


Finally, this is the TypeConverter and Editor definitions for the list:


The UserRol class is a typical class, without any special attributes.

I have discovered that when I use the custom editor for Roles property, the collection is not persisted. When I use the default editor for the collection, the collection is persisted.

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