RuleSyntaxException occurred

Question

Hi everyone.
I am working on Hosting the Designer. After refering to this
I did Debug->Exceptions->CLR Exceptions
After loading the xoml file when I go through
DynamicUpdateCondition property->Declarative Rule Condition->Condition Name->Select Condition->New Condition
I get the following exception:
"RuleSyntaxException occurred. The condition can not be empty."
What do I need to do?

Thanks in advance.

Below is my full code;

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.Activities;
using System.Workflow.ComponentModel.Design;
using System.Runtime.InteropServices;
using System.Collections;
using System.Collections.ObjectModel;
using System.IO;
using System.Xml;
using System.Workflow.ComponentModel.Serialization;
using System.Drawing.Design;
 
 
namespace WF29_10
{
    public partial class WFDControl : Form, IServiceProvider, ISite
    {
 
        private WorkflowView workflowView;
        private IDesignerHost designerHost;
 
        public WFDControl()
        {
            InitializeComponent();
 
          
        }
 
        private void WFDControl_Load(object sender, EventArgs e)
        {
            InitialiseWorkflow();
 
            if (designerHost != null)
            {
                designerHost.RemoveService(typeof(IIdentifierCreationService));                
                designerHost.AddService(typeof(IMenuCommandService), new WorkflowMenuCommandService(designerHost));               
                TypeProvider typeProvider = new TypeProvider(designerHost);
                typeProvider.AddAssemblyReference(typeof(string).Assembly.Location);
                designerHost.AddService(typeof(ITypeProvider), typeProvider, true);
              
            }
 
            InitialiseSelectionChangedHandler();
 
            InitialiseToolbox();
 
        }
 
 
 
 
        # region Menu Command
 
        internal sealed class WorkflowMenuCommandService : MenuCommandService
        {
            public WorkflowMenuCommandService(IServiceProvider serviceProvider)
                : base(serviceProvider)
            {
            }
 
            public override void ShowContextMenu(CommandID menuID, int x, int y)
            {
                if (menuID == WorkflowMenuCommands.SelectionMenu)
                {
                    ContextMenu contextMenu = new ContextMenu();
 
                    foreach (DesignerVerb verb in Verbs)
                    {
                        MenuItem menuItem = new MenuItem(verb.Text, new EventHandler(OnMenuClicked));
                        menuItem.Tag = verb;
                        contextMenu.MenuItems.Add(menuItem);
                    }
 
                    MenuItem[] items = GetSelectionMenuItems();
                    if (items.Length > 0)
                    {
                        contextMenu.MenuItems.Add(new MenuItem("-"));
                        foreach (MenuItem item in items)
                            contextMenu.MenuItems.Add(item);
                    }
 
                    WorkflowView workflowView = GetService(typeof(WorkflowView)) as WorkflowView;
                    if (workflowView != null)
                        contextMenu.Show(workflowView, workflowView.PointToClient(new Point(x, y)));
                }
            }
 
            private MenuItem[] GetSelectionMenuItems()
            {
                List<MenuItem> menuItems = new List<MenuItem>();
 
                bool addMenuItems = true;
                ISelectionService selectionService = GetService(typeof(ISelectionService)) as ISelectionService;
                if (selectionService != null)
                {
                    foreach (object obj in selectionService.GetSelectedComponents())
                    {
                        if (!(obj is Activity))
                        {
                            addMenuItems = false;
                            break;
                        }
                    }
                }
 
                if (addMenuItems)
                {
                    Dictionary<CommandID, string> selectionCommands = new Dictionary<CommandID, string>();
                    selectionCommands.Add(WorkflowMenuCommands.Cut, "Cut");
                    selectionCommands.Add(WorkflowMenuCommands.Copy, "Copy");
                    selectionCommands.Add(WorkflowMenuCommands.Paste, "Paste");
                    selectionCommands.Add(WorkflowMenuCommands.Delete, "Delete");
                    selectionCommands.Add(WorkflowMenuCommands.Collapse, "Collapse");
                    selectionCommands.Add(WorkflowMenuCommands.Expand, "Expand");
                    selectionCommands.Add(WorkflowMenuCommands.Disable, "Disable");
                    selectionCommands.Add(WorkflowMenuCommands.Enable, "Enable");
 
                    foreach (CommandID id in selectionCommands.Keys)
                    {
                        MenuCommand command = FindCommand(id);
                        if (command != null)
                        {
                            MenuItem menuItem = new MenuItem(selectionCommands[id], new EventHandler(OnMenuClicked));
                            menuItem.Tag = command;
                            menuItems.Add(menuItem);
                        }
                    }
                }
 
                return menuItems.ToArray();
            }
 
            private void OnMenuClicked(object sender, EventArgs e)
            {
                MenuItem menuItem = sender as MenuItem;
                if (menuItem != null && menuItem.Tag is MenuCommand)
                {
                    MenuCommand command = menuItem.Tag as MenuCommand;
                    command.Invoke();
                }
            }
        }
 
        # endregion
 
        #region ISite Members
 
        IComponent ISite.Component
        {
            get { return this; }
        }
 
        IContainer ISite.Container
        {
            get { return this.Container; }
        }
 
        bool ISite.DesignMode
        {
            get { return true; }
        }
 
        string ISite.Name
        {
            get
            {
                return this.Name;
            }
            set
            {
                this.Name = value;
            }
        }
 
        #endregion
 
        #region IServiceProvider Members
 
        object IServiceProvider.GetService(Type serviceType)
        {
            return this.GetService(serviceType);
        }
 
        #endregion
    
 
        private void InitialiseToolbox()
        {
            MyToolboxService toolboxService = new MyToolboxService();
 
            designerHost.AddService(typeof(IToolboxService),
              toolboxService);
 
            myToolboxListView1.ServiceProvider = designerHost;
 
            myToolboxListView1.InitialiseToolboxItems();
        }
 
 
 
        private void InitialiseWorkflow()
        {
            DesignSurface designSurface = new DesignSurface();
            WorkflowLoader loader = new WorkflowLoader();
 
            designSurface.BeginLoad(loader);
            designerHost = designSurface.GetService(typeof(IDesignerHost)) as IDesignerHost;
            
        }
 
        private void LoadWorkflow()
        {
            if (designerHost != null && designerHost.RootComponent != null)
            {
                this.propertyGrid1.Site = designerHost.RootComponent.Site;
                IRootDesigner rootDesigner = designerHost.GetDesigner(designerHost.RootComponent) as IRootDesigner;
                if (rootDesigner != null)
                {
                  
                    this.workflowView = rootDesigner.GetView(ViewTechnology.Default) as WorkflowView;
                    this.panel1.Controls.Add(this.workflowView);
                    this.workflowView.Dock = DockStyle.Fill;
                    this.workflowView.TabIndex = 1;
                    this.workflowView.TabStop = true;
                    this.workflowView.HScrollBar.TabStop = false;
                    this.workflowView.VScrollBar.TabStop = false;
                    this.workflowView.Focus();
                    this.workflowView.FitToScreenSize();
                }
            }
        }
 
        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string fileName = GetFileName();
 
            if (fileName != null)
            {
                Activity rootActivity = LoadWorkflowFromFile(fileName);
 
                if (rootActivity != null)
                {
                    AddActivityToDesigner(rootActivity);
 
                    LoadWorkflow();
 
                    SelectRootActivity();
 
                }
            }
 
        }
 
        private void SelectRootActivity()
        {
            ISelectionService selectionService =
              GetHostService<ISelectionService>();
 
            selectionService.SetSelectedComponents(
              new object[] { designerHost.RootComponent });
        }
        private void InitialiseSelectionChangedHandler()
        {
            ISelectionService selectionService =
              GetHostService<ISelectionService>();
 
            selectionService.SelectionChanged +=
              new EventHandler(OnSelectionChanged);
        }
        void OnSelectionChanged(object sender, EventArgs e)
        {
            ISelectionService selectionService =
              GetHostService<ISelectionService>();
 
            propertyGrid1.SelectedObjects =
              (object[])selectionService.GetSelectedComponents();
        }
        private T GetHostService<T>() where T : class
        {
            T service = designerHost.GetService(typeof(T)) as T;
            return (service);
        }
 
 
        private void AddActivityToDesigner(Activity rootActivity)
        {
           
            designerHost.Container.Add(rootActivity);
 
           
            CompositeActivity compositeActivity = rootActivity as CompositeActivity;
 
            if (compositeActivity != null)
            {
                foreach (Activity childActivity in compositeActivity.Activities)
                {
                    
                    AddActivityToDesigner(childActivity);
                }
            }
        }
        private static Activity LoadWorkflowFromFile(string fileName)
        {
            ActivityMarkupSerializer serializer = new ActivityMarkupSerializer();
            Activity activity = null;
 
            using (XmlReader reader = XmlReader.Create(fileName))
            {
                activity = serializer.Deserialize(reader) as Activity;
            }
            return (activity);
        }
        private static string GetFileName()
        {
            string fileName = null;
 
            OpenFileDialog d = new OpenFileDialog();
            d.Title = "Select XAML based Workflow";
            d.Filter = "XAML Files (*.xoml)|*.xoml|All Files (*.*)|*.*";
 
            if (d.ShowDialog() == DialogResult.OK)
            {
                fileName = d.FileName;
            }
            return (fileName);
        }
 
    }
}

Answer 1

Hi,

Could you paste the full exception trace stack?

---

This posting is provided "AS IS" with no warranties, and confers no rights. Microsoft Online Community Support

Answer 2

Hi,

Here is what Call Stack window shows:

     System.Workflow.Activities.dll!System.Workflow.Activities.Rules.Parser.ParseCondition(string expressionString) + 0x11c bytes     
     System.Workflow.Activities.dll!System.Workflow.Activities.Rules.Design.RuleConditionDialog.InitializeDialog(System.CodeDom.CodeExpression expression) + 0x17c bytes     
     System.Workflow.Activities.dll!System.Workflow.Activities.Rules.Design.RuleConditionDialog.RuleConditionDialog(System.Workflow.ComponentModel.Activity activity, System.CodeDom.CodeExpression expression) + 0x1dd bytes     
     System.Workflow.Activities.dll!System.Workflow.Activities.Rules.Design.ConditionBrowserDialog.OnNewInternal() + 0x33 bytes     
     System.Workflow.Activities.dll!System.Workflow.Activities.Rules.Design.BasicBrowserDialog.OnNew(object sender, System.EventArgs e) + 0x2a bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.RaiseEvent(object key, System.EventArgs e) + 0x41 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStripButton.OnClick(System.EventArgs e) + 0x3e bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.HandleClick(System.EventArgs e) + 0xc7 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.HandleMouseUp(System.Windows.Forms.MouseEventArgs e = {X = 33 Y = 14 Button = Left}) + 0x220 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.FireEventInteractive(System.EventArgs e, System.Windows.Forms.ToolStripItemEventType met) + 0x87 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.FireEvent(System.EventArgs e, System.Windows.Forms.ToolStripItemEventType met) + 0x122 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStrip.OnMouseUp(System.Windows.Forms.MouseEventArgs mea) + 0xc7 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.WmMouseUp(ref System.Windows.Forms.Message m, System.Windows.Forms.MouseButtons button, int clicks) + 0xf2 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.WndProc(ref System.Windows.Forms.Message m) + 0x544 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ScrollableControl.WndProc(ref System.Windows.Forms.Message m) + 0x45 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ToolStrip.WndProc(ref System.Windows.Forms.Message m = {msg=0x202 (WM_LBUTTONUP) hwnd=0x50538 wparam=0x0 lparam=0xf0021 result=0x0}) + 0x71 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.OnMessage(ref System.Windows.Forms.Message m) + 0xd bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.WndProc(ref System.Windows.Forms.Message m) + 0xd6 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.DebuggableCallback(System.IntPtr hWnd, int msg = 514, System.IntPtr wparam, System.IntPtr lparam) + 0x75 bytes     
     [Native to Managed Transition]     
     [Managed to Native Transition]     
     System.Windows.Forms.dll!System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(int dwComponentID, int reason = 4, int pvLoopData = 0) + 0x2ea bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason = 4, System.Windows.Forms.ApplicationContext context = {System.Windows.Forms.Application.ModalApplicationContext}) + 0x17d bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) + 0x53 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Form.ShowDialog(System.Windows.Forms.IWin32Window owner) + 0x4ee bytes     
     System.Windows.Forms.dll!System.Windows.Forms.PropertyGridInternal.PropertyGridView.ShowDialog(System.Windows.Forms.Form dialog) + 0x17a bytes     
     System.Workflow.Activities.dll!System.Workflow.Activities.Rules.Design.ConditionNameEditor.EditValue(System.ComponentModel.ITypeDescriptorContext typeDescriptorContext, System.IServiceProvider serviceProvider, object o) + 0xff bytes     
     System.Windows.Forms.dll!System.Windows.Forms.PropertyGridInternal.GridEntry.EditPropertyValue(System.Windows.Forms.PropertyGridInternal.PropertyGridView iva = {System.Windows.Forms.PropertyGridInternal.PropertyGridView}) + 0x4c bytes     
     System.Windows.Forms.dll!System.Windows.Forms.PropertyGridInternal.PropertyDescriptorGridEntry.EditPropertyValue(System.Windows.Forms.PropertyGridInternal.PropertyGridView iva) + 0x13 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.PropertyGridInternal.PropertyGridView.PopupDialog(int row) + 0x703 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.PropertyGridInternal.PropertyGridView.OnBtnClick(object sender, System.EventArgs e) + 0x87 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.OnClick(System.EventArgs e) + 0x57 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Button.OnClick(System.EventArgs e) + 0x49 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.PropertyGridInternal.DropDownButton.OnClick(System.EventArgs e) + 0xe bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Button.OnMouseUp(System.Windows.Forms.MouseEventArgs mevent = {X = 10 Y = 8 Button = Left}) + 0xc3 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.PropertyGridInternal.DropDownButton.OnMouseUp(System.Windows.Forms.MouseEventArgs e) + 0xe bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.WmMouseUp(ref System.Windows.Forms.Message m, System.Windows.Forms.MouseButtons button, int clicks) + 0xf2 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.WndProc(ref System.Windows.Forms.Message m) + 0x544 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.ButtonBase.WndProc(ref System.Windows.Forms.Message m) + 0xce bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Button.WndProc(ref System.Windows.Forms.Message m) + 0x2b bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.OnMessage(ref System.Windows.Forms.Message m) + 0xd bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.WndProc(ref System.Windows.Forms.Message m) + 0xd6 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.DebuggableCallback(System.IntPtr hWnd, int msg = 514, System.IntPtr wparam, System.IntPtr lparam) + 0x75 bytes     
     [Native to Managed Transition]     
     [Managed to Native Transition]     
     System.Windows.Forms.dll!System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(int dwComponentID, int reason = -1, int pvLoopData = 0) + 0x2ea bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason = -1, System.Windows.Forms.ApplicationContext context = {System.Windows.Forms.ApplicationContext}) + 0x17d bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) + 0x53 bytes     
     System.Windows.Forms.dll!System.Windows.Forms.Application.Run(System.Windows.Forms.Form mainForm) + 0x2e bytes     
>    WF29_10.exe!WF29_10.Program.Main() Line 17 + 0x1a bytes    C#
     [Native to Managed Transition]     
     [Managed to Native Transition]     
     mscorlib.dll!System.AppDomain.ExecuteAssembly(string assemblyFile, System.Security.Policy.Evidence assemblySecurity, string[] args) + 0x32 bytes     
     Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() + 0x2b bytes     
     mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x3b bytes     
     mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x81 bytes     
     mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x40 bytes   

Answer 3

Hi,

Do you really want a WF3 solution(a question from Mike Taulty)? Since everything has been rewriten in WF4 and it is much easier to do Hosting the Designer job in WF4.

Regards

---

This posting is provided "AS IS" with no warranties, and confers no rights. Microsoft Online Community Support

Answer 4

Hi,

Currently I am working in VS2005. To use WF4 will I need to shift to VS2008/VS2010?

Thanks.

Answer 5

Hi Andrew Zhu,

I want a WF3 solution.

Thanks.