- C#编程大幅提高OUTLOOK的邮件搜索能力!

using Outlook = Microsoft.Office.Interop.Outlook;

...

Outlook.Application OutlookApp;
Outlook.NameSpace OutlookNS;
Outlook.MAPIFolder Inbox;
Outlook.MAPIFolder Sentbox;

...

void InitOutlookApp()
{
    if (OutlookApp == null)
    {
        OutlookApp = new Outlook.Application();
        OutlookNS = OutlookApp.GetNamespace("MAPI");
        Inbox = OutlookNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox); //获取默认的收件箱
        Sentbox = OutlookNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderSentMail); //获取默认的已发邮件
    }
}

public class MailInfo
{
    public string EntryId { get; set; }
    public string Folder { get; set; }
    public string From { get; set; }
    public string Subject { get; set; }
    public string ConversationId { get; set; }
    public string Body { get; set; }
    public string To { get; set; }
    public Document ToDoc()
    {
        var doc = new Document();
        doc.Fields.Add(new Field("EntryId", this.EntryId, Webus.Documents.FieldAttributes.None));
        doc.Fields.Add(new Field("Folder", this.Folder, Webus.Documents.FieldAttributes.Index));
        doc.Fields.Add(new Field("From", this.From, Webus.Documents.FieldAttributes.Index));
        doc.Fields.Add(new Field("Subject", this.Subject, Webus.Documents.FieldAttributes.AnalyseIndex));
        doc.Fields.Add(new Field("ConversationId", this.ConversationId, Webus.Documents.FieldAttributes.Index));
        doc.Fields.Add(new Field("Body", this.Body, Webus.Documents.FieldAttributes.AnalyseIndex));
        doc.Fields.Add(new Field("To", this.To, Webus.Documents.FieldAttributes.Index));
        return doc;
    }
    public MailInfo()
    {

    }
    public MailInfo(Document doc)
    {
        this.EntryId = doc.GetField("EntryId").Value.ToString();
        this.Folder = doc.GetField("Folder").Value.ToString();
        this.From = doc.GetField("From").Value.ToString();
        this.Subject = doc.GetField("Subject").Value.ToString();
        this.ConversationId = doc.GetField("ConversationId").Value.ToString();
        this.Body = doc.GetField("Body").Value.ToString();
        this.To = doc.GetField("To").Value.ToString();
    }
}

IIndexer IndexAccessor = null;
...
private void frmOutlookSearcher_Load(object sender, EventArgs e)
{
    ...
    this.IndexAccessor = new IndexManager(new MailAnalyzer()); //用MailAnalyzer作为分析器
    this.IndexAccessor.MaxIndexSize = int.MaxValue; //索引大小无限制
    this.IndexAccessor.MinIndexSize = int.MaxValue; //索引大小无限制
    this.IndexAccessor.MergeFactor = int.MaxValue; //不做merge
    ...
}
...
private void IndexProc()
{        
    IndexAccessor.OpenOrNew(AppDomain.CurrentDomain.BaseDirectory + @"Index"); //索引数据放在运行目录的"Index"文件夹里面
    ...
    //读取outlook, 添加文档到索引
    ...
}

while(...)
{
    //先读取inbox
    for (; InboxIndx <= Inbox.Items.Count; InboxIndx++)
    {
        ...
        this.InitOutlookApp();
        var item = Inbox.Items[InboxIndx];
        if (item is Outlook.MailItem) //注意, 并非每个inbox的item都是mailItem, 因此要做个类型检查, 否则程序会挂起, 死在那儿.
        {
            Outlook.MailItem mailItem = item as Outlook.MailItem;
            var mailInfo = new MailInfo()
            {
                EntryId = string.IsNullOrEmpty(mailItem.EntryID) ? string.Empty : mailItem.EntryID,
                From = string.IsNullOrEmpty(mailItem.SenderEmailAddress) ? string.Empty : mailItem.SenderEmailAddress,
                ConversationId = string.IsNullOrEmpty(mailItem.ConversationID) ? string.Empty : mailItem.ConversationID,
                Subject = string.IsNullOrEmpty(mailItem.Subject) ? string.Empty : mailItem.Subject,
                Body = string.IsNullOrEmpty(mailItem.HTMLBody) ? string.Empty : mailItem.HTMLBody,
                Folder = string.IsNullOrEmpty(Inbox.Name) ? string.Empty : Inbox.Name,
                To = string.IsNullOrEmpty(mailItem.To) ? string.Empty : mailItem.To
            };
            IndexAccessor.Add(mailInfo.ToDoc()); //添加文档到索引
        }
        ...
    }
    ...
    //再读取sentbox
    for (; SentboxIndex <= Sentbox.Items.Count; SentboxIndex++)
    { ... }
}

private void frmOutlookSearcher_Load(object sender, EventArgs e)
{
    ...
    this.IndexAccessor = new IndexManager(new MailAnalyzer()); //用MailAnalyzer作为分析器
    this.IndexAccessor.MaxIndexSize = int.MaxValue; //索引大小无限制
    this.IndexAccessor.MinIndexSize = int.MaxValue; //索引大小无限制
    this.IndexAccessor.MergeFactor = int.MaxValue; //不做merge
    ...
    IndexingTask = Task.Factory.StartNew(this.IndexProc); //在后台线程编制索引
}

Subject="{0}" OR Body="{0}"

//1. 搜索标题含有"张三"并且正文含有"朋友聚餐"的邮件:
Subject="张三" & Body="朋友聚餐"

//2. 在已发邮件中搜索标题中含有"张三"的邮件:
Folder="[已发邮件]" AND Subject="张三"

//3. 搜索标题包含"Hotfix"的邮件: (hotfix和hotfixing都会被搜索到)
Subject WILDCARD "hotfix"