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Add property to user control design time properties VB windows forms

Posted By:      Posted Date: September 16, 2010    Points: 0   Category :Windows Application
hi  everyBody,   I've  created a user control that exports a given radGridView to many file formats like Excel, PDF, Csv,... this user control takes the Gridview object as aprobeity Public Class ucExport Private _grdName As RadGridView Private exporter As RadGridViewExcelExporter Private exportVisualSettings As Boolean Dim fileName As String Dim openExportFile As Boolean Public Property grdObj As RadGridView Set(ByVal value As RadGridView) _grdName = value End Set Get Return _grdName End Get End Property End class  how could I add this property to design mode, that's when I click F4, how can I add this to prosperities, rather than code mode  

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Visual Studio .NET: Building Windows Forms Controls and Components with Rich Design-Time Features, P


This is the second of two articles discussing the extremely rich design-time features of the .NET Framework. Part 1 discussed the basics, showing you where to start and how to extend your control implementation through attributes and interfaces, as well as their effects on the property browser, code serialization, and other controls. Part 2 continues the journey by concentrating on design-time functionality that you can implement beyond your components and controls, including TypeConverters, UITypeEditors, and Designers. It would be impossible to cover everything you can do in two short articles, which is a testament to just how all-encompassing and flexible the design-time capability of the .NET Framework is.

Michael Weinhardt and Chris Sells

MSDN Magazine May 2003

Visual Studio .NET: Building Windows Forms Controls and Components with Rich Design-Time Features


Visual Studio .NET provides support for designing rich features into your controls and components, allowing you to set properties, set form placement, inherit from base classes, and much more. So how does Visual Studio .NET do all this? What does the Windows Forms designer do? What's the difference between a control and a component? How does Visual Studio integrate your controls so that they can access features of the .NET Framework?In this article, the authors answer these common questions by building a clock control and taking the reader along for the ride. In building the control, hosts and containers are illustrated, the property browser is explained, debugging is discussed, and a general overview of the design-time infrastructure is presented.

Michael Weinhardt and Chris Sells

MSDN Magazine April 2003

Accessing Property Value of a Custom Control by another Custom Control in Design-time



I created an Extender which has a custom property that drills down a list XML elements from an xml file, where users can select xml elements during design-time. This works perfectly fine. However, my code only has a hardcoded xml filename (source of the xml elements list) and I need to change this by maxing the xml file user-specified.

What I did is that I created another control (panel) which has a custom property that when clicked (through the ellipsis), it will allow a developer to select the xml file which is supposed to be the source xml file that the Extenders shall use. The filedialog from custom panel's property works perfectly fine.

However, my problem now is that when I drag-drop my Extender, I cannot find a way to get the property value of the custom Panel Control which contains the xml filename. I tried creating a static variable which I thought the custom controls can share but VS2010 is breaking.

Please take note that my problem is on Design-time, asp.net.

Appreciate any help. Thanks a lot.

Dhon Nuevo.

How to programmatically add controls to Windows forms at run time by using Visual C#

Create a Windows Forms Application
Start Visual Studio .NET or Visual Studio 2005 or a later version, and create a new Visual C# Windows Application project named WinControls. Form1 is added to the project by default.
Double-click Form1 to create and view the Form1_Load event procedure.
Add private instance variables to the Form1 class to work with common Windows controls. The Form1 class starts as follows:

Custom Control Design-Time SiteMap Provider Error


Greetings - I was referred here by MSDN forums hope this is the right place -  

I have a custom control (:WebControl) that renders web.sitemap in a specific way. While it runs error free and produces the expected result, at Design-Time it complains

Error Creating Control - MyControl  The provider 'AspNetXmlSiteMapProvider' specified for the defaultProvider does not exist in the providers collection.

I have discovered that the error is cause by this line of code:

string div = string.Format("<div class='{0}' id='{1}'>{2}</div>", this.CssClass, this.ID.ToString(), EnumerateNodesRecursive(SiteMap.RootNode, level));

or more specifically, by the reference to SiteMap.RootNode - I am not clear what is missing thoough because I have configured the SiteMapProvider in web.config as this:

        <add name="AspNetXmlSiteMapProvider" 
             type="System.Web.XmlSiteMapProvider, System.Web, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" 

Category attribute of user control property does not work correctly in categories tab.



I have a User Control (ascx) and a property which a want to display in my categories tab in Visual Studio in the category named "Styles".

[Category("Styles"), DefaultValue(""), Description("The value for formating something.")]
public String MyFormatProperty
set { /* the code for set */; }
get { /* the code for get */; }

And here is the problem: Actually I do not need a get, because I only have to set the property (write only property). But when I omit the get, the property is displayed in the "Misc" category in the categories tab in Visual Studio. Only when I code the get as well, then the property is displayed correctly in the "Styles" category in the categories tab in Visual Studio.

Does anybody know why? How can I display the category correctly only with set?

Thanks, S.

Least Privilege: Teach Your Apps To Play Nicely With Windows Vista User Account Control


User Account Control in Windows Vista keeps the OS safe from intentional and accidental configuration changes.

Chris Corio

MSDN Magazine January 2007

Smart Clients: Build A Windows Forms Control To Consume And Render WSRP Portlets


Smart client apps use local resources, provide a rich client experience, and support intelligent install mechanisms. Web services offer powerful interoperability and integration features. Find out how to combine them to develop integrated apps that incorporate data from disconnected sources.

Carl Nolan

MSDN Magazine February 2006

Cutting Edge: A New Grid Control in Windows Forms


Grid controls are essential in many of today's apps. Until now, though, most developers using Visual Basic® have had to buy third-party components to get an effective, easy to use grid component. The Windows® Forms DataGrid turned out to lack too many features for the average developer.

Dino Esposito

MSDN Magazine April 2005

Web-Aware Apps: Build Hyperlinks into Your Client App with the Windows Forms LinkLabel Control


LinkLabels are Windows Forms controls that enable a user to hyperlink to a URL that points to either the Web or the local directory system. While the SDK documentation discusses the control, it does not demonstrate how linking is accomplished, nor does it outline the power and flexibility the control provides. This article fills those gaps, showing how to link using the LinkLabel control. It also shows the flexibility of this control for the programmer using the .NET Framework. In addition, the author covers the large number of properties that allow you to customize your controls and accurately place them. Their built-in behaviors are also discussed, along with their use in both Visual Basic .NET and C#.

Dan Hurwitz

MSDN Magazine February 2003

Windows Forms: Developing Compelling User Controls that Target Forms in the .NET Framework


In the beginning, writing controls meant dealing with Windows messages. Then came Visual Basic controls, which introduced methods, properties, and events. Later, ActiveX controls, which ran atop COM, became popular. While each innovation in control writing brought more flexibility, nothing has matched the versatility of the new .NET Windows Forms controls and Web Forms controls. This article, the first of a two-part series, introduces the reader to Windows Forms, beginning with their inheritance from one of the .NET CLR base classes, which makes control creation much faster than before. Control programming is illustrated through the development of a login control. The equally flexible Web Forms controls will be covered in Part 2.

David S. Platt

MSDN Magazine April 2002

User Control and DataSourceID Property


I created a user control (.ascx) that contains a paging-user-control, a repeater and some other controls.
I want to use the property DataSourceID. How should I get the data from the datasource and when?
What is the recommended way?

I did it this way:
- Create a method to get the data by reflection, like:

private void PerformSelect()
	if (!String.IsNullOrEmpty(this.DataSourceID))
		Control control = Page.FindControl(this.DataSourceID);
		if (control == null)
			control = Parent.FindControl(this.DataSourceID);

		MethodInfo method = control.GetType().GetMethod("Select");
		IEnumerable data = (IEnumerable)method.Invoke(control, new object[0]);

		this.DataSource = data;
 - Call this method
In PageLoad when no postback
Changing the current page (paging-user-control)
Changing the current tab (tab-user-control)
Switching Visibility to true

I think that way is not the optimum, is there any better way?
Do you have any suggestions or links?

Thanks for your help, Andreas

User Control as Composite Control Property


I have a composite control (Called Dialog) which has a property "ContentControl"

At design time, I'd like this property to bind to a user control that is on the page.

When I add the items in the designer, the designer loads as expected.

However, when I try to run the web page, I get the following error:

Parser Error Message: Cannot create an object of type 'System.Web.UI.UserControl' from its string representation 'EditTerm1' for the 'ContentControl' property.

Please let me know if there is another way to bind a user control as a property of a composite control.


Designer Code:


	<cc1:Dialog ID="Dialog1" runat="server" Buttons="SaveCancel" 
Title="Edit Term" ContentControl="EditTerm1" />

Forms based users being prompted for windows authentication login for My Sites photos in user lists

Here's an issue I didn't see coming for our forms based authentication users. 

We have a web application extended to an external url to handle forms based authentication for users outside of our domain. Our setup looks like this...

Internal Users/Windows Authentication - moss.domain.com
External Users/Forms Based - mossext.domain.com
My Site for Internal Users - mysites.domain.com

When our forms based users are accessing user lists, or discussion pages that display user pictures, they are getting a windows authentication login for our internal users (mysites.domain.com) who have populated their my site with personal photo.

How do we fix this? 

User Control not accessing the value of the properties send to it from the aspx page.


I have a dynamic accordion on a page. Set its datasource to an object of paged data source.The user control is in the accordions content template. When i was writing code the properties were showing but after giving the values of databases as


<uc:UserControl1  runat="server" Property1='<%#DataBinder.Eval(Container.DataItem,"columname1")%>' Property2='<%#DataBinder.Eval(Container.DataItem,"columname2")%>'  ></uc:UserControl1>


but the values shows null, these properties are shown as textboxes text property by user control.

MoreOver when I checked the values of database Items.So i made a textbox instead of usercontrol here as

<asp:TextBox ID="txtTest" runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"Columname1")%>'></asp:TextBox>

It is showing the correct value. And if i pass the value directly it is also showing correctly like

<uc:UserControl1  runat="server" Property1="XYZ")%>' Property2="ABC")%>'  ></uc:UserControl1>

. where I am wrong

the problem is eval is not passing the value to usercont

Problem with User Control Properties


I've been trying to figure out a problem that I've had for the past week and believe that the issue is something with a user control that I created. In short, the properties for the user control are recognized by intelisense when I register the control and then add it in the markup for a page. However, the values that I set in the markup are ignored by the class as if the properties don't exist.



Parent Page

 <%@ Register Src="../../controls/contactdetail.ascx" TagName="ContactDetail" TagPrefix="tfc" %>

<tfc:ContactDetail runat="server" ID="UserControlContactDetail" Title="Contact-Detail" ContactId="1580" EnableViewState="true" />   



User Control Class

Imports System.Data
Imports System.Data.SqlClient

Partial Class control_ContactDetail
    Inherits System.Web.UI.UserControl
    Public Property ContactId() As Integer
            Return _ContactId
        End Get
        Set(ByVal value As Integer)
            _ContactId = value
        End Set
    End Property
    Private _ContactId As Integer
    Public Property Title() As String
            Return _Title
        End Get
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