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POWorkflowInspectionServices throw me an XamlObjectWriterException in Workflow Foundation
 

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    <p>For a simple prototype, I've to display a workflow file, and show on which step we are actually.</p> <p>I found a sample here: <a href="http://msdn.microsoft.com/en-us/library/ee624139.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ee624139.aspx</a></p> <p>Which does almost what I need.</p> <p>In this sample, all action never wait on another action. So I created myself some very dummy Activity:</p> <pre><code> public class WaitForNextCall :NativeActivity { public const String WaitBookmark = "WaitingStep"; #region Overrides of NativeActivity /// &lt;summary&gt; /// When implemented in a derived class, runs the activity’s execution logic. /// &lt;/summary&gt; /// &lt;param name="context"&gt;The execution context in which the activity executes.&lt;/param&gt; protected override void Execute(NativeActivityContext context) { context.CreateBookmark(WaitBookmark); } protected override bool CanInduceIdle { get { return true; } } #endregion } </code></pre> <p>Which seems to work. Since there I was creating my workflow directly in-code:</p> <pre><code> return new Sequence() { Activities = { new WaitForNextCall(){DisplayName = "Step one"}, new WaitForNextCall(){DisplayName = "Step Two"}, new WaitForNextCall(){DisplayName = "Step Three"}, new WaitForNextCall(){DisplayName = "Step Four"} } }; </code></pre> <p>The only problem with that is that I only see a "Sequence" element in the workflow designer.</p> <p>So I created a xaml file which describe exactily the same thing, and I load it like this:</p> <pre><code>return ActivityXamlServices.Load("Workflows/WorkflowSample.xaml") as DynamicActivity; </code></pre> <p>But then I got this exception:</p> <pre><code> System.Xaml.XamlObjectWriterException occurred Message=Impossible de créer le type inconnu '{clr-MyTestNameSpace.UserInterface.WorkflowItems}WaitForNextCall'. Source=System.Xaml LineNumber=0 LinePosition=0 StackTrace: à System.Xaml.XamlObjectWriter.WriteStartObject(XamlType xamlType) à System.Xaml.XamlWriter.WriteNode(XamlReader reader) [...] </code></pre> <p>I double-checked, the file is present(it appears, that there is another error message when file isn't specified correctly). But it cannot find my "WaitFornextCall" class, which is used just several lines below.</p> <p>I'm a little desesperate, I'm trying to understand how works Workflow foundations, but it's a little hard for now :(</p> <p>Any advice will be welcome</p> <p>Edit: I tried this to read the file, I don't have any exception in my constructor, but I don't know why, some libraries I'm using(ActiPro) seems to doesn't work anymore after the load:</p> <pre><code> XamlReader reader = new XamlXmlReader("Workflows/WorkflowSample.xaml", new XamlXmlReaderSettings(){LocalAssembly = System.Reflection.Assembly.GetExecutingAssembly()}); return ActivityXamlServices.Load(reader); </code></pre>
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