How save activity? not to serialize

Question

I have the sample of sequence and what to add new activities dynamically

 

public class PageActivity: SequentialWorkflowActivity

{

public PageActivity()

{

CodeActivity code = new CodeActivity("ca1");

code.ExecuteCode += delegate { Console.WriteLine("bla"); };

Activities.Add(code);

}

}

 

now I'm trying to add new activities to my sequence and save it to the memory stream

 

private static void Main(string[] args)

{

CodeActivity code = new CodeActivity("ca2");

code.ExecuteCode += delegate { Console.WriteLine("bla-bla"); };

 

PageActivity pa = new PageActivity();

pa.Activities.Add(code);

Stream stream = new MemoryStream();;

pa.Save(stream);

...

}

 

and then start Workflow as

instance = workflowRuntime.CreateWorkflow(XmlReader.Create(stream));

 

the problem is that in the pa.Save(stream); I got exception

"This is an invalid design time operation. You can only perform the operation at runtime."

 

How to fix it?

Is there another way to add activities and other WF entities dynamically?

Answer 1

hi,

 

   Are you trying to do this at design time or runtime?  If at runtime,then use dynamic update, see blog post on it here

http://blogs.msdn.com/markhsch/archive/2005/09/23/473373.aspx.

 

If you are doing at design time, you need to have a custom activity designer which will handle it.

 

Thanks,

Sung Hon