wxdwfsequentialview.cs

基于微软WF开发的工作流全套实例源码

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.Workflow.ComponentModel.Serialization;
using System.Xml;
using System.CodeDom.Compiler;
using System.Workflow.Runtime;
using System.Reflection;
using System.Threading;
namespace wxwinter.wf.Design
{
    public class wxdWFSequentialView : UserControl, IDisposable, IServiceProvider
    {

       
        private WorkflowView workflowView;  //工作查看器
        private DesignSurface designSurface;
        private wxdWFLoader loader;


        SequentialWorkflowActivity workflow;


        public wxdWFSequentialView()
        {
            WorkflowTheme.CurrentTheme.ReadOnly = false;
            WorkflowTheme.CurrentTheme.AmbientTheme.ShowConfigErrors = true ;
            WorkflowTheme.CurrentTheme.ReadOnly = true;
        }

   
        public void ProcessZoom(int zoomFactor)
        {
            this.workflowView.Zoom = zoomFactor;
            this.workflowView.Update();
        }


        public new object GetService(Type serviceType)
        {
            return (this.workflowView != null) ? ((IServiceProvider)this.workflowView).GetService(serviceType) : null;
        }



        //从XML文件加载工作流到设计器的核心
        private void LoadWorkflow(string xoml)
        {
            SuspendLayout();

            DesignSurface designSurface = new DesignSurface();
            wxdWFLoader loader = new wxdWFLoader("");
            loader.Xoml = xoml;
            designSurface.BeginLoad(loader);
            IDesignerHost designerHost;
            designerHost = designSurface.GetService(typeof(IDesignerHost)) as IDesignerHost;
            if (designerHost != null && designerHost.RootComponent != null)
            {
                IRootDesigner rootDesigner = designerHost.GetDesigner(designerHost.RootComponent) as IRootDesigner;
                if (rootDesigner != null)
                {
                    UnloadWorkflow();

                    this.designSurface = designSurface;
                    this.loader = loader;
                    this.workflowView = rootDesigner.GetView(ViewTechnology.Default) as WorkflowView;
                    this.Controls.Add(this.workflowView);
                    this.workflowView.Dock = DockStyle.Fill;
               
                    ISelectionService selectionService = GetService(typeof(ISelectionService)) as ISelectionService;

                 
                }
            }

            ResumeLayout(true);
        }

        private void UnloadWorkflow()
        {
            IDesignerHost designerHost;
            designerHost = GetService(typeof(IDesignerHost)) as IDesignerHost;
            if (designerHost != null && designerHost.Container.Components.Count > 0)
                wxdWFLoader.DestroyObjectGraphFromDesignerHost(designerHost, designerHost.RootComponent as Activity);

            if (this.designSurface != null)
            {
                this.designSurface.Dispose();
                this.designSurface = null;
            }

            if (this.workflowView != null)
            {
                Controls.Remove(this.workflowView);
                this.workflowView.Dispose();
                this.workflowView = null;
            }
        }

        //显示默认的工作流
        public  void ShowWorkflow(SequentialWorkflowActivity v)
        {
            this.workflow = v;

            using (StringWriter stringWriter = new StringWriter())
            {
                using (XmlWriter xmlWriter = XmlWriter.Create(stringWriter))
                {
                    WorkflowMarkupSerializer serializer = new WorkflowMarkupSerializer();
                    serializer.Serialize(xmlWriter, workflow);
                    LoadWorkflow(stringWriter.ToString());
                    
                }
            }
        }


  



    }
}