Question

我正在尝试处理元素添加到图表中的事件，但AddAdvice（）会抛出未处理的COM异常：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Visio = Microsoft.Office.Interop.Visio;

namespace VisioAddAdviceWinForms
{
    public partial class Form1 : Form
    {
        private EventSink eventSink = null;

        public Form1()
        {
            InitializeComponent();

            this.eventSink = new EventSink();
            unchecked
            {
                axDrawingControl1.Window.EventList.AddAdvise(((short)Visio.VisEventCodes.visEvtAdd + (short)Visio.VisEventCodes.visEvtShape), this.eventSink, "", "");
            }
        }
    }

    public class EventSink : Visio.IVisEventProc
    {
        object Visio.IVisEventProc.VisEventProc(
                short eventCode,
                object source,
                int eventID,
                int eventSeqNum,
                object subject,
                object moreInfo)
        {
            Visio.IVApplication app = null;
            Visio.IVDocument doc = null;
            Visio.IVShape shape;
            try
            {
                if (source is Visio.IVApplication)
                {
                    app = (Visio.Application)source;
                }
                else if (source is Visio.IVDocument)
                {
                    doc = (Visio.Document)source;
                }
                switch (eventCode)
                {
                    case unchecked((short)Visio.VisEventCodes.visEvtAdd) +
                    (short)Visio.VisEventCodes.visEvtShape:
                        shape = (Visio.Shape)subject;
                        MessageBox.Show("added");
                        break;

                    case (short)Visio.VisEventCodes.visEvtApp +
                    (short)Visio.VisEventCodes.visEvtNonePending:
                        MessageBox.Show("pending");
                        break;

                    case (short)Visio.VisEventCodes.visEvtDel + (short)
                    Visio.VisEventCodes.visEvtShape:
                        shape = (Visio.Shape)subject;
                        MessageBox.Show("deleted");
                        break;

                    default:
                        break;
                }
            }
            catch (Exception err)
            {
                MessageBox.Show("Exception in IVisEventProc.VisEventProc: "
                        + err.Message);
            }

            return null;

        }
    }
}

Answer 1

不确定您在使用AddAdvise时遇到的异常，但为什么不绕过AddAdvise并使用Visio的互操作层提供的托管事件包装器？是否有理由使用AddAdvise而不是Visio Primary Interop Assembly？

您可以直接在控件本身上添加ShapeAdded事件的处理程序吗？或者，如果不在控件上，则肯定在控件内包含的Visio.Document上。

另请参阅此论坛帖子中的示例代码：

http://social.msdn.microsoft.com/Forums/en-US/vsto/thread/c80df85f-4e97-4f4c-8563-52cb40786b13/

这个其他stackoverflow问题的答案：

C# - Is there any OnShapeMoved or OnShapeDeleted event in Visio?

Answer 2

添加：

使用System.Runtime.InteropServices;

你有这个：

public class EventSink : Visio.IVisEventProc{

把这个：

[ComVisible(true)]
public class EventSink : Microsoft.Office.Interop.Visio.IVisEventProc{

Visio AddAdvice引发异常

2 个答案: