C# - Outlook VSTO - 让 AdvancedSearchComplete 触发

Question

我正在将我创建的旧 Outlook VBA 宏转换为 C# VSTO 加载项。此工具用于将电子邮件批量归档到各种公共文件夹和本地 .pst 文件，并且需要能够根据用户的搜索条件查找电子邮件。我有一段时间让AdvancedSearchComplete 事件在 VBA 中触发，但最终让它工作。当然，我现在在 C# VSTO 插件中也遇到了同样的问题。

要使用该工具，用户将在用户表单上输入他们的条件，然后单击 Find Emails 按钮执行搜索，结果填充数据网格视图。

public partial class Email_Archiver : Form
{

    public Email_Archiver()
    {
        InitializeComponent();

        //Add event handlers
        Globals.ThisAddIn.Application.AdvancedSearchComplete += new Microsoft.Office.Interop.Outlook.ApplicationEvents_11_AdvancedSearchCompleteEventHandler(Application_AdvancedSearchComplete);
    }

    public void Application_AdvancedSearchComplete(Microsoft.Office.Interop.Outlook.Search SearchObject)
    { //Handles AdvancedSearchComplete event

        if (SearchObject.Tag == "Archiver Search")
        {
            OutlookFunctions.SearchComplete = true;
            MessageBox.Show(this, "Search Complete!","Email Search Error",MessageBoxButtons.OK);
        }

    }

    private void Find_Button_Click(object sender, EventArgs e)
    {

        //Set datagridview datasource
        EmailList.DataSource = FindEmails();
        EmailList.Columns["EntryID"].Visible = false;

    }

    public DataTable FindEmails()
    {
        var dt = new DataTable();

        //Format DataTable
        dt.Columns.Add("EntryID", typeof(string));
        dt.Columns.Add("Project No.", typeof(int));
        dt.Columns.Add("Subject", typeof(string));
        dt.Columns.Add("Sender", typeof(string));
        dt.Columns.Add("Recipient", typeof(string));
        dt.Columns.Add("Time Sent", typeof(DateTime));
        dt.Columns.Add("Size", typeof(decimal));

        //Do stuff to get "searchFolders" and "searchCriteria" from form
        //...

        dt = OutlookFunctions.RunAdvancedSearch(searchFolders, searchCriteria);

        return dt;
    }
}


class OutlookFunctions
{

    public static bool SearchComplete;

    public static DataTable RunAdvancedSearch(string[] searchFolders, string[] searchCriteria)
    {

        //Get Outlook namespace
        var oApp = Globals.ThisAddIn.Application;
        var oNS = oApp.GetNamespace("mapi");
        Microsoft.Office.Interop.Outlook.Search advSearch = null;

        //Do other stuff to properly set up the scope and filter
        //...

        //Perform search
        SearchComplete = false;
        try
        {
            advSearch = oApp.AdvancedSearch(scope, filter, false, "Archiver Search");
        }
        catch (System.Exception ex)
        {
            MessageBox.Show("An error has occurred during the search for emails. \n \n"
                    + ex.Message);
            return null;
        }

        Stopwatch timer = new Stopwatch();
        timer.Start();

        while (!SearchComplete && timer.Elapsed.TotalSeconds < 10)
        {
            //Do nothing
        }

        if (!SearchComplete)
        {
            advSearch.Stop();
        }

        if (advSearch != null)
        {
            var resultTable = new DataTable();

            //Send results to resultTable

            return resultTable;
        }

        return null;

    }

}

搜索有效，我得到了正确的结果，但我必须添加计时器才能让事情继续进行，否则代码永远不会完成，因为AdvancedSearchComplete 没有被触发。我仍然会收到我正在寻找的所有电子邮件，并且只在 Outlook 资源管理器中进行基本相同的搜索，我会在几分之一秒内获得相同的结果。

在计时器结束搜索并且 datagridview 充满结果后，AdvancedSearchComplete 触发，我得到“搜索完成！”消息。

我在这里遗漏了什么阻止事件触发以结束搜索（及时）？

Answer 1

使用后台工作可以参考以下代码：

BackgroundWorker bw = new BackgroundWorker();
    private void button1_Click(object sender, EventArgs e)
    {
        bw.DoWork += new DoWorkEventHandler(bw_DoWork);
        bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
        if (bw.IsBusy != true)
        {
            bw.RunWorkerAsync();
        }
    }
    private void bw_DoWork(object sender, DoWorkEventArgs e)
    {
        //
        // Boring.... Do your long work
        //
        System.Threading.Thread.Sleep(20000);
    }
    private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        if (this.InvokeRequired)
        {
            //Hide your form here
            this.Invoke(new MethodInvoker(delegate { this.Close(); }));
        }
    }

Answer 2

看起来，在 AdvancedSearch 方法启动之后的任何代码基本上都会结束搜索，而不会触发 AdvancedSearchComplete 或 AdvancedSearchStopped 事件。

相反，我现在在 ThisAddIn 类中有以下内容：

private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
    //Create task pane object
    archiverTaskPane1 = new ArchiverTaskPane();
    customTaskPane = this.CustomTaskPanes.Add(archiverTaskPane1, "Title");

    //Add event handler for opening task pane
    customTaskPane.VisibleChanged += new EventHandler(customTaskPane_VisibleChanged);

    //Add event handler for Outlook's AdvancedSearch
    Globals.ThisAddIn.Application.AdvancedSearchComplete += new Outlook.ApplicationEvents_11_AdvancedSearchCompleteEventHandler(Application_AdvancedSearchComplete);
}

public void Application_AdvancedSearchComplete(Microsoft.Office.Interop.Outlook.Search SearchObject)
{
    DataTable dt = new DataTable();
    OutlookFunctions oFunctions = new OutlookFunctions();
    dt = oFunctions.BuildResults(SearchObject.Results);
    this.archiverTaskPane1.DataGridFiller(dt);
}

在 ArchiverTaskPane 类中（以前的 Email_Archiver 表单 - 我真的很喜欢任务窗格的想法）

private void Find_Button_Click(object sender, EventArgs e)
{
    FindEmails();
}

public void FindEmails()
{
    DataTable dt = new DataTable();

    //Add columns to DataTable

    //Do stuff to get "searchFolders" and "searchCriteria" from form
    //...

    //Create OutlookFunctions instance
    OutlookFunctions oFunctions = new OutlookFunctions();
    oFunctions.RunAdvancedSearch(searchFolders, searchCriteria);
}

public void DataGridFiller(DataTable results)
{
    EmailList.DataSource = results;
}

在 OutlookFunctions 类中：

public static DataTable RunAdvancedSearch(string[] searchFolders, string[] searchCriteria)
{
    //Get Outlook namespace
    var oApp = Globals.ThisAddIn.Application;
    var oNS = oApp.GetNamespace("mapi");
    Microsoft.Office.Interop.Outlook.Search advSearch = null;

    //Do other stuff to properly set up the scope and filter
    //...

    //Perform search
    SearchComplete = false;
    try
    {
        advSearch = oApp.AdvancedSearch(scope, filter, false, "Archiver Search");
    }
    catch (System.Exception ex)
    {
        MessageBox.Show("An error has occurred during the search for emails. \n \n"
                + ex.Message);
    }
}

public DataTable BuildResults(Results searchResults)
{
    DataTable resultTable = new DataTable();

    //Do stuff to build DataTable from search results
    //...

    return resultTable;
}