VSTO Outlook Explorer BeforeMinimize，BeforeMaximize 事件不会触发答案

【问题标题】：VSTO Outlook Explorer BeforeMinimize, BeforeMaximize events won't fireVSTO Outlook Explorer BeforeMinimize，BeforeMaximize 事件不会触发
【发布时间】：2014-12-19 18:50:34
【问题描述】：

我花了最后几个小时弄清楚如何订阅任何 Outlook 资源管理器的 BeforeMinimize 和 BeforeMaximize 事件，但失败了。到目前为止我做了什么：

public partial class ThisAddIn
{
    Outlook.Explorer explorer;
    Outlook.Application application;
    Outlook.ExplorerEvents_10_BeforeMinimizeEventHandler beforeMinimizeEventHandler;

    ThisAddin_Startup()
    {
        //... create custom Task pane

        application = Globals.ThisAddIn.Application;
        explorer = application.ActiveExplorer();
        beforeMinimizeEventHandler = new Outlook.ExplorerEvents_10_BeforeMinimizeEventHandler(explorer_BeforeMinimize);
        explorer.BeforeMinimize += beforeMinimizeEventHandler;

    }

    void explorer_BeforeMinimize(ref bool Cancel)
    {
        System.Windows.Forms.MessageBox.Show("BeforeMinimize");
        Cancel = true;
    }
}

该事件永远不会被触发。我还尝试了其他方法，例如将 explorer 转换为 Outlook.ExplorerEvents_10_Event 然后订阅。我还检查了只有一个 Explorer。但是，没有任何效果。我做错什么了吗？感谢您的帮助。

【问题讨论】：

标签： c# .net events outlook vsto

【解决方案1】：

对您的代码进行了一些修改，现在我发现一切正常。

我已经将事件处理程序直接添加到 Explorer.BeforeMinimize，而不是您添加的内容。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using Outlook = Microsoft.Office.Interop.Outlook;
using Office = Microsoft.Office.Core;

namespace OutlookAddIn4
{
    public partial class ThisAddIn
    {

        Outlook.Explorer explorer;
        Outlook.Application application;

        private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            application = Globals.ThisAddIn.Application;
            explorer = application.ActiveExplorer();
            explorer.BeforeMinimize += explorer_BeforeMinimize;
        }

        void explorer_BeforeMinimize(ref bool Cancel)
        {
            System.Windows.Forms.MessageBox.Show("BeforeMinimize");
            Cancel = true;
        }

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

        #region VSTO generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InternalStartup()
        {
            this.Startup += new System.EventHandler(ThisAddIn_Startup);
            this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
        }

        #endregion
    }
}

编译后，启动代码编译为

private void ThisAddIn_Startup(object sender, EventArgs e)
{
    this.application = Globals.ThisAddIn.Application;
    this.explorer = this.application.ActiveExplorer();
    (new ComAwareEventInfo(typeof(ExplorerEvents_10_Event), "BeforeMinimize")).AddEventHandler(this.explorer, new ExplorerEvents_10_BeforeMinimizeEventHandler(this.explorer_BeforeMinimize));
}

【讨论】：