SharePoint search 功能的定制开发

概要

客户要求改善 SharePoint 2007的搜索功能，我们要自定义开发搜索功能，一翻调查和研究，sharepoint 的搜索用到KeywordSearchQuery和FullTextSearchQuery 两种方式，因为我们要用到自定义的sharepoint list字段做为过虑条件，所以采用FullTextSearchQuery 来开发。

设计

FullTextSearchQuery 做sharepoint 2007二次开发要用到以下组件:

using Microsoft.Office.Server;
using Microsoft.Office.Server.Search;
using Microsoft.Office.Server.Search.Query;

在sharepoint 2007中，我们如下scope():

默认的有people和all sites两个scope。我们以All sites举例。

sharepoint Content sources 在爬虫时的流程图(方便理解scope()内容的来源)

以下是查询的流程图:

用户使用查询时，sharepoint对于用户的安全检查:

以上说明仅供读者了解sharepoint查询时要做的工作.

Microsoft.SharePoint.Search.Query 命名空间包括三个查询类：

FullTextSqlQuery 使用此类可执行 SQL 语法搜索查询。
KeywordQuery 使用此类可执行关键字语法搜索查询。

为自定义搜索应用程序选择查询类

若要确定用于自定义搜索应用程序（FullTextSqlQuery 或 KeywordQuery）的适当的类，请考虑希望应用程序代码支持的搜索查询中的复杂级别。

下面的列表标识仅受使用 FullTextSqlQuery 类的 SQL 搜索语法支持的附加查询元素：FREETEXT、CONTAINS、LIKE和ORDER BY.

代码设计

public class SharePointSearch
{
 
    #region Fields
 
    string queryStr = @"select hitHighlightedProperties,size,Write, author, path,
                        hitHighlightedSummary,title,contentclass
                        from scope() where " +
                        "\"scope\" = '{0}' AND FREETEXT(defaultproperties, '{1}') ";
    string conditionSearchSource = " AND CONTAINS(path,'{0}')";
 
    #endregion
 
    #region Constructor
 
    /// <summary>
    /// Default constructor.
    /// </summary>
    public SharePointSearch()
    {
    }
 
    #endregion
 
    #region Public Methods
 
    /// <summary>
    /// 
    /// </summary>
    /// <param name="scope"></param>
    /// <param name="searchSource"></param>
    /// <param name="keyword"></param>
    /// <param name="rowLimit"></param>
    /// <returns></returns>
    public DataTable GetSearchResultByKeyWord(string scope, string searchSource, string keyword, int rowLimit)
    {
        string query = string.Format(this.queryStr, scope, keyword);
        if (!string.IsNullOrEmpty(searchSource))
            query += string.Format(this.conditionSearchSource, searchSource);
 
        return this.CustomSearch(query, rowLimit);
    }
 
    /// <summary>
    /// 
    /// </summary>
    /// <param name="query"></param>
    /// <param name="rowLimit"></param>
    /// <returns></returns>
    public DataTable GetSearchResultByQuery(string query, int rowLimit)
    {
        return this.CustomSearch(query, rowLimit);
    }
 
    #endregion
 
    #region Private Methods
 
    /// <summary>
    /// Excute search query
    /// </summary>
    /// <param name="query"></param>
    /// <param name="rowLimit"></param>
    /// <returns></returns>
    private DataTable CustomSearch(string query, int rowLimit)
    {
        DataTable result = new DataTable();
        string url = SPContext.Current.Web.Url;
 
        using (SPSite site = new SPSite(url))
        {
            ServerContext context = ServerContext.GetContext(site);
 
            FullTextSqlQuery fullQuery = new FullTextSqlQuery(site);
            fullQuery.Culture = System.Globalization.CultureInfo.InvariantCulture;
            fullQuery.QueryText = query;
            fullQuery.ResultTypes = ResultType.RelevantResults;
            fullQuery.EnableStemming = false;
            fullQuery.IgnoreAllNoiseQuery = true;
            fullQuery.TrimDuplicates = true;
 
            fullQuery.KeywordInclusion = KeywordInclusion.AnyKeyword;
            fullQuery.RowLimit = rowLimit;
            if (SPSecurity.AuthenticationMode != System.Web.Configuration.AuthenticationMode.Windows)
                fullQuery.AuthenticationType = QueryAuthenticationType.PluggableAuthenticatedQuery;
            else
                fullQuery.AuthenticationType = QueryAuthenticationType.NtAuthenticatedQuery;
 
            ResultTableCollection rt = fullQuery.Execute();
            ResultTable resultTable = rt[ResultType.RelevantResults];
            result.Load(resultTable, LoadOption.OverwriteChanges);
        }
 
        return result;
    }
 
    #endregion
}

而为什么FullTextSqlQuery 的属性是这样设置的,因为能过moss工具产生的xml结果图如下:

<?xml version="1.0" encoding="utf-8" ?>
<QueryPacket xmlns="urn:Microsoft.Search.Query" Revision="1000">
<Query domain="QDomain">
 <SupportedFormats><Format>urn:Microsoft.Search.Response.Document.Document</Format></SupportedFormats>
 <Context>
   <QueryText language="en-US" type="MSSQLFT"><![CDATA[ SELECT Title, Rank, Size, Description, Write, Path FROM portal..scope() WHERE FREETEXT(DefaultProperties, 'test') AND  ( ("SCOPE" = 'All Sites') )   ORDER BY "Rank" DESC ]]></QueryText>
 </Context>
 <Range><StartAt>1</StartAt><Count>20</Count></Range>
 <EnableStemming>false</EnableStemming>
 <TrimDuplicates>true</TrimDuplicates>
 <IgnoreAllNoiseQuery>true</IgnoreAllNoiseQuery>
 <ImplicitAndBehavior>false</ImplicitAndBehavior>
 <IncludeRelevanceResults>true</IncludeRelevanceResults>
 <IncludeSpecialTermResults>false</IncludeSpecialTermResults>
 <IncludeHighConfidenceResults>false</IncludeHighConfidenceResults>
</Query></QueryPacket>