.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

How to display breakpoint and debug visual cues with custom activity designer based on WorkflowViewE

Posted By:      Posted Date: August 29, 2010    Points: 0   Category :Windows Application
Hi,   I am developing custom activity designers based on "WorkflowViewElement" instead of "ActivityDesigner" in my xaml. It allows me to have greater control of the look and feel of the designer. However I noticed that with this approach, the breakpoint visual cue (Dark red solid circle that appears on the left side of the designer when you set breakpoint on the designer) is not visible. It works fine when you write your designed based on "ActivityDesigner". The same behavior happens to the debug visual cue when you debugging the WF. It appears as bright yellow rectangle surrounding the activity designer if you are based on "ActivityDesigner", but it is not available when your designer is based on"WorkflowViewElement". Any help is highly appreciated. Li

View Complete Post

More Related Resource Links

Visual Studio Designer does not display custom control with embedded image



I am developing a custom control which includes an embeded image to display in the design mode of the control. The Visual Studio designer does not display the image of the custom control. Here is the html generated by the overloaded GetDesignTimeHtml() function:


<div style='height:30px;width:215px;border:5;'><input type="text" value="[DropDownListMultiColumn1]" style="height:25px;width:175px;margin:0;padding:0;border-spacing:0;" /><img  src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA0AAAASCAIAAAAPCcNlAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAEpJREFUKFNjPHDgAAMh4ODgwABU9x8vaGhoAJkDUQckcYEhqA4tfCA+w+4PuFK493H6FxJYhNWhBeQQDD+sSQHhDyALPyCUPpHkAUdqnQngjlwtAAAAAElFTkSuQmCC" style="height:20px;width:15px;margin:0;padding:0;border-spacing:0;" /></div>


This markup displays as expected within an html form. However, in Visual Studio, it shows a red x where the image should be displayed.

Smart Tags: Simplify UI Development with Custom Designer Actions in Visual Studio


Windows Forms 2.0 components expose smart tags by utilizing Designer Actions. By taking advantage of this feature, you can add smart tags to your own custom components to make setting their properties and other actions much easier and developer-friendly.

Michael Weinhardt

MSDN Magazine July 2005

Custom designer for a Flowchart activity?

Can anyone point me in the right direction for developing a custom designer for a Flowchart activity?  In actual fact, the Flowchart control we are using is a custom activity - it's not the regular .NET Flowchart activity, but our own creation with a collection for FlowNodes/etc.  We'd like to put a UI around it now as well ... mimicking the .NET Fllowchart designer.  Is that really possible, or extremely difficult?  It seems there's no real API or anything available for constructing the node connectors, arrows, etc.

How to implement Design-Time drag & drop from Custom Visual Studio Tool Window to WPF Designer

Hi, Could someone tell me if it is possible to intercept a design time drop event coming from a custom Visual Studio tool window onto the cider design surface? I am hoping to use the same API's as those used by the Visual Studio 2010 'Data Sources' tool window, which provides drag & drop data-binding between classes and WPF/Silverlight controls. My requirement is to pass a DataObject (used with the WPF DragDrop API) from my custom Visual Studio WPF tool window treeview to my custom WPF control at design time, read the data and do some binding/XAML manipulation of my own. The drag aspect is simple enough but I can't work out how to accept a drop event from anything other than the toolbox. At the moment, when I drag my treenode over the design surface it shows the 'cannot drop here' cursor. If someone could give me some insight into how the 'Data Sources' tool window allows dragging of treenodes to controls I would really appreciate it. It is obviously possible but which API's are used and are they public? Thanks in advance, Paul  

Rehosted Designer does not display custom Activities with custom ActivityDesigner


In a custom Rehosted Designer, when attempt to load a custom activity that has the Designer Attribute, referecing a custom ActivityDesigner, the rehosted designer display only the message "Could not generate view for MyCustomActivity" with red backtext.

When the mouse pointer is passed over the text, the following message is displayed:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation, --> System.Exception: The component 'Procwork.Software.Mersey.CORE.Common.ProcessManager.Designers.BusinessSourceActivityDesigner' does not have a resource identified by the URI '/Procwork.Software.Mersey.CORE.Common.ProcessManager;component/designers/businesssourceactivitydesigner.xaml'.
       at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
       at Procwork.Software.Mersey.CORE.Common.ProcessManager.Designers.BusinessSourceActivityDesigner.InitializeComponent() in c:\Procwork\PW.Mersey\Modules\CORE\Common\ProcessManager\Designers\BusinessSourceActivityDesigner.xaml:line 1
       at Procwork.Software.Mersey.CORE.Common.ProcessManager.Designers.BusinessSourceActivityDesigner..ctor() in C:\Procwork\PW

Failed to display the IActivityTemplateFactory designer as a root activity on the rehosted applicati


Hi guys,

I have created a custom composite activity that derived from the Activity and IActivityTemplateFactory. When I try to deploy this composite activity as a root activity on the rehosted application. It failed to display its designer probably. If I put a sequence as a root activity, and the composite activity as a child activity inside the sequence activity,  I got my composite activity designer display nicely on my rehosted designer. Is it a limitation for us to put a IActivityTemplateFactory designer as root activity in the rehosted app. Please advice.


public class CustomCompositeActivity : Activity, IActivityTemplateFactory
  public Activity Create(System.Windows.DependencyObject target)

    return new Sequence
       Activities = 
          new WriteLine
            Text = "Hello"
          new WriteLine
            Text = "WF 4.0"

the joy of writing a custom workflow activity for SharePoint Designer...


So, I need an activity that will replace some old text into new text in a given string.
Not present OOTB in SharePoint Designer, so - oh boy! oh boy! - we can develop it ourselves using Visual Studio!

Ok great, I did some reading about it on SP2007 in the past, but never needed it, so never actually tried it.
Now I'm on SP2010, so I googled again to find guides on how to write my very first custom workflow activity to use in SharePoint Designer 2010.
Nothing to be found.... The few posts about 2010 were only stating that it works still the same as in SP2007, and to look for guides on 2007.

Ok, so I googled some guides on how to do this in SP2007. I found one from MSDN, perfect to start with you'd say: http://msdn.microsoft.com/en-us/library/cc627284.aspx 
But really, it doesn't work the same... When I create an Activity Library project in VS2010, I don't have a class, like in the guide. All I have is a xaml file, no cs at all, and I have absolutely no clue what I should add in order to get the same class as in the guide. Adding a regular class is not it, since in the guide they're using a partial class. So I'm blocked 5secs after I started reading the guide... just great.

I'm so fed up with the lack of information on development for SharePoint. I hit

How to drop Activities in Custom Activity Designer having custom style template?



I have designed a custom activity designer developed using Activity Designer XAML and using that in a rehosted Workflow environment on a WPF. I have changed the outer design of the Activity designer by setting the style template to my required style. If I do this, I am unable to add the activities to the custom activity having my custom activity designer.

Am I missing anything.? Please help me in this regard.

Thanks in advance,



Is there a plan to support a custom activity type as a root document in xaml on VS workflow designer



Referring to the post below. It seems that the current VS workflow designer only support "Activity" type as a root document. Is there a plan to support a custom activity type as a root document in xaml on next release of WF?




How to get a list of unkown number of Object from a custom Activity Designer



I'm  trying to get a list of Object of unknown size. I use a stackpanel in my designer to have as many ExpressionTextBox as needed. The number is only known at design time through an ExpressiontTextBox and a validate button. Once the button is clicked, I generate the ExpressionTextBoxes as follow :

    Private Sub btnValidate_Click(ByVal sender As System.Object,
                                  ByVal e As System.Windows.RoutedEventArgs)
      stack.Children.RemoveRange(0, stack.Children.Count)
      For i As Integer = 0 To (

Custom Workflow Activity Designer Serialization Issues


I have an activity which has collection properties as below


    public sealed class TaskActivity : NativeActivity
        public TaskActivity()
            TaskParameters = new ObservableCollection<PMTaskParameter>();
            TaskExceptions = new ObservableCollection<Guid>();

Argument validation in custom activity designer


I am having problems getting validation to work properly in the designer for my custom activity. The simplest sample to reproduce the behavior is as follows:

I have a custom WF4 activity with a dynamic collection of arguments stored in a dictionary:

public class DictionaryActivity : NativeActivity
  public Dictionary<string, InArgument> Arguments { get; set; }
  public InArgument<string> StringArg { get; set; }

  public DictionaryActivity()
    Arguments = new Dictionary<string, InArgument>();

  protected override void Execute(NativeActivityContext context)
  { }

In the designer I dinamically crea

Custom Activity designer in VS



My custom Activity has designer that relies on external service.

In re-hosted environment I register the service right after WorkflowDesigner is created :

 _workflowDesigner.Context.Services.Publish<IMyService> ( _service);

The question is how do I tell VS to publish my service? (service class name, constructor arguments...)


Visual Studio closes itself by opening aspx-Page designer after Windows Update


Hey Guys,

I've a problem with my Visual Studio.

On the 13th of August 2010 i installed a Windows update on my vista sp2 pc. For this date my Visual Studio 2008 sp 1 always has closed itself by opening an aspx-page in designer view. There is no error message just closing the window. I restored a backup of my windows from the time before updating it and it helped, i could open aspx pages in the design view till the update has been installed again automatically after rebooting the pc. I can't disable windows updates, cause it's my pc at work and safety is very important. I hope you could help me out of this disaster.



Toolbox: Database and OR/M Tools, Oren Eini and Custom Visual Studio Tabs


This month we look at tools for enhancing the LINQ to SQL and Entity Framework designers, Oren Eini's .NET development blog, Visual Studio tab customization, and more.

Scott Mitchell

MSDN Magazine December 2009

Parallel Debugging: Debugging Task-Based Parallel Applications in Visual Studio 2010


In Visual C++ 10 and the Microsoft .NET Framework 4, Microsoft is introducing new libraries and runtimes to significantly ease the process of expressing parallelism in your code base, together with new tool support for performance analysis and debugging of parallel applications. In this article, you will learn about debugging support in Visual Studio 2010, much of which is focused on task-based programming models.

Stephen Toub, Daniel Moth

MSDN Magazine September 2009

SQL Server: Display Your Data Your Way with Custom Renderers for Reporting Services


SQL Server 2005 Reporting Servicesis a great tool that offers a centralized approach to storing and rendering reports. It also lets users view and download reports without installing additional software. Plus, reports can be saved in any number of different formats using custom report renderers. In this article, the author will develop one such report renderer that outputs HTML reports, but the skills you'll learn can easily be used to create a renderer for Microsoft Word documents or any other format of your choosing.

James Yip

MSDN Magazine February 2005

ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend