制作自定义工作流(WWF)设计器

May 2006

应用于:
???Windows Workflow Foundation beta 2.2
???Microsoft Visual C# Version 2.0
???Visual Studio 2005

demo下载：Download the code sample, WorkflowDesignerControl.exe.

???????????????????????????{
??????????????????????????????protected?override?void?PerformLoad(IDesignerSerializationManager?serializationManager)
?????????????????????????????????{
????????????????????????????????????base.PerformLoad(serializationManager);
????????????????????????????????????//?Implement?the?logic?to?read?from?the?serialized?state,
????????????????????????????????????//?create?the?activity?tree?and?the?corresponding?designer
????????????????????????????????????//?tree?and?add?it?to?the?designer?host
?????????????????????????????????}
????????????????????????????
??????????????????????????????protected?override?void?PerformFlush(IDesignerSerializationManager?manager)
?????????????????????????????????{
????????????????????????????????????//?Implement?the?logic?to?save?the?activity?tree?to?a
????????????????????????????????????//?serialized?state?along?with?any?code?beside?elements?
?????????????????????????????????}
???????????????????????????}

???????????????????????????{
??????????????????????????????//?Get?the?designer?associated?with?the?root?component
??????????????????????????????IRootDesigner?rootDesigner?=????designerHost.GetDesigner(designerHost.RootComponent)?as?IRootDesigner;
??????????????????????????????if?(rootDesigner?!=?null)
??????????????????????????????{
?????????????????????????????????this.designSurface?=?designSurface;
?????????????????????????????????this.loader?=?loader;
??????????????????????????????
????????????????????????????????????//?Assign?the?default?view?of?the?rootdesigner?to?WorkflowView
????????????????????????????????????this.workflowView?=?rootDesigner.GetView(ViewTechnology.Default)?as??????????WorkflowView;
????????????????????????????
????????????????????????????????????//?Add?the?workflow?view?control?to?winforms?app
????????????????????????????????????this.workflowViewSplitter.Panel1.Controls.Add(this.workflowView);
????????????????????????????????????this.workflowView.Focus();
????????????????????????????????????this.propertyGrid.Site?=?designerHost.RootComponent.Site;
??????????????????????????????}
????????????????????????????}

???????????????{
?????????????????????MenuCommand?command?=?FindCommand(id);
?????????????????????if?(command?!=?null)
??????????????????????{
????????????????????????//?For?each?command?create?a?new?menu?item?and?add?an
????????????????????????MenuItem?menuItem?=?new?MenuItem(selectionCommands[id],?new??????????EventHandler(OnMenuClicked));
????????????????????????menuItem.Tag?=?command;
????????????????????????contextMenu.MenuItems.Add(menuItem);
?????????????????????}
???????????????}
????????????????
???????????????//?Handle?the?event?when?the?MenuItem?is?clicked
???????????????private?void?OnMenuClicked(object?sender,?EventArgs?e)
???????????????{
????????????????//?Retrieve?the?menu?item?that?was?clicked
????????????????MenuItem?menuItem?=?sender?as?MenuItem;
????????????????if?(menuItem?!=?null?&&?menuItem.Tag?is?MenuCommand)
?????????????????????{
????????????????????????//?invoke?the?command?corresponding?to?the?menu?item?clicked
????????????????????????MenuCommand?command?=?menuItem.Tag?as?MenuCommand;
????????????????????????command.Invoke();
?????????????????????}
???????????????}

??????????????????{
?????????????????????IMenuCommandService?menuService?=
?????????????????????GetService(typeof(IMenuCommandService))?as?IMenuCommandService;
?????????????????????if?(menuService?!=?null)
?????????????????????menuService.GlobalInvoke(cmd);
??????????????????}

2：生成后台代码MemberCreationService，和EventBindingService

???????????????{
???????????????????????private?void?EventHandler(object?sender,?System.EventArgs?e)
???????????????????????{
???????????????????????}
???????????????}

4：显示组件属性的ActivityBind Dialog: IPropertyValueUIService

5：Rules Dialog:用来编辑各种Rule。

12.??????????????????????????{
13.?????????????????????????????IList?loaderrors?=?null;
14.??????????????????????