ActiveExplorer().Selection returns 以前在 Outlook C# 中选择的邮件

Question

我有以下代码。当用户点击 Reply 或 Reply 按钮时，它会传递将在 SendAndComplete 按钮上处理的原始电子邮件。

public partial class ThisAddIn
    {
        public object selectedObject = null;
        Outlook.MailItem mailItem = null;

        private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            Outlook.Application application = this.Application;
            Outlook.Explorer currentExplorer = application.ActiveExplorer();

            //Get this event fire when selection changes
            currentExplorer.SelectionChange += new Outlook.ExplorerEvents_10_SelectionChangeEventHandler(CurrentExplorer_Event);
        }

        public void CurrentExplorer_Event()
        {
            if (this.Application.ActiveExplorer().Selection.Count == 1
             && this.Application.ActiveExplorer().Selection[1] is Outlook.MailItem)
            {

                selectedObject = this.Application.ActiveExplorer().Selection[1];
                mailItem = selectedObject as Outlook.MailItem;
                ((Outlook.ItemEvents_10_Event)mailItem).Reply += new Outlook.ItemEvents_10_ReplyEventHandler(MailItem_Reply);
                ((Outlook.ItemEvents_10_Event)mailItem).ReplyAll += new Outlook.ItemEvents_10_ReplyAllEventHandler(MailItem_ReplyAll);
            }
        }

        void MailItem_Reply(object response, ref bool cancel)
        {
            //No code here

        }

        void MailItem_ReplyAll(object response, ref bool cancel)
        {
            //No code here
        }
    }

现在 selectedObject 将在单击按钮时用于 Ribbon.cs。

public void SendnCompleteButton_Click(Office.IRibbonControl control)
        {
            Outlook.Application application = new Outlook.Application();
            var addIn = Globals.ThisAddIn;
            Outlook.MailItem mailItem = addIn.selectedObject as Outlook.MailItem;
            MessageBox.Show(mailItem.Subject + " " + mailItem.ReceivedTime + " " + mailItem.Sender.Name)
        }

消息框显示之前选择的邮件，如何释放之前选择的对象？

谢谢。

Answer 1

首先，无需在功能区按钮的事件处理程序中创建新的 Outlook Application 实例：

Outlook.Application application = new Outlook.Application();

相反，您需要使用 Globals.ThisAddIn.Application 属性或仅使用提供开箱即用的 Application 属性的插件 class .

其次，必须在全局范围内声明事件源对象，例如：

Outlook.Explorer currentExplorer;
private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            currentExplorer = Application.ActiveExplorer();

            //Get this event fire when selection changes
            currentExplorer.SelectionChange += new Outlook.ExplorerEvents_10_SelectionChangeEventHandler(CurrentExplorer_Event);
        }

第三，检查是否在Outlook中选择了单个项目UI是不正确的。相反，您应该检查是否选择了任何项目：

if (this.Application.ActiveExplorer().Selection.Count > 0)

ActiveExplorer().Selection returns 以前在 Outlook C# 中选择的邮件

ActiveExplorer().Selection returns previously selected mail in Outlook C#

outlook

vsto

outlook-addin