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:

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using Microsoft.Office.Server; 

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using Microsoft.Office.Server.Search; 

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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

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public class SharePointSearch 

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{ 

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    #region Fields 

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    string queryStr = @"select hitHighlightedProperties,size,Write, author, path, 

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                        hitHighlightedSummary,title,contentclass 

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                        from scope() where " + 

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                        "\"scope\" = '{0}' AND FREETEXT(defaultproperties, '{1}') "; 

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    string conditionSearchSource = " AND CONTAINS(path,'{0}')"; 

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    #endregion 

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    #region Constructor 

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    /// <summary> 

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    /// Default constructor. 

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    /// </summary> 

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    public SharePointSearch() 

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    { 

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    } 

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    #endregion 

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    #region Public Methods 

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    /// <summary> 

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    ///  

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    /// </summary> 

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    /// <param name="scope"></param> 

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    /// <param name="searchSource"></param> 

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    /// <param name="keyword"></param> 

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    /// <param name="rowLimit"></param> 

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    /// <returns></returns> 

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    public DataTable GetSearchResultByKeyWord(string scope, string searchSource, string keyword, int rowLimit) 

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    { 

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        string query = string.Format(this.queryStr, scope, keyword); 

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        if (!string.IsNullOrEmpty(searchSource)) 

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            query += string.Format(this.conditionSearchSource, searchSource); 

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        return this.CustomSearch(query, rowLimit); 

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    } 

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    /// <summary> 

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    ///  

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    /// </summary> 

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    /// <param name="query"></param> 

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    /// <param name="rowLimit"></param> 

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    /// <returns></returns> 

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    public DataTable GetSearchResultByQuery(string query, int rowLimit) 

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    { 

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        return this.CustomSearch(query, rowLimit); 

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    } 

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    #endregion 

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    #region Private Methods 

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    /// <summary> 

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    /// Excute search query 

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    /// </summary> 

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    /// <param name="query"></param> 

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    /// <param name="rowLimit"></param> 

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    /// <returns></returns> 

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    private DataTable CustomSearch(string query, int rowLimit) 

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    { 

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        DataTable result = new DataTable(); 

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        string url = SPContext.Current.Web.Url; 

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        using (SPSite site = new SPSite(url)) 

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        { 

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            ServerContext context = ServerContext.GetContext(site); 

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            FullTextSqlQuery fullQuery = new FullTextSqlQuery(site); 

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            fullQuery.Culture = System.Globalization.CultureInfo.InvariantCulture; 

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            fullQuery.QueryText = query; 

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            fullQuery.ResultTypes = ResultType.RelevantResults; 

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            fullQuery.EnableStemming = false; 

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            fullQuery.IgnoreAllNoiseQuery = true; 

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            fullQuery.TrimDuplicates = true; 

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            fullQuery.KeywordInclusion = KeywordInclusion.AnyKeyword; 

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            fullQuery.RowLimit = rowLimit; 

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            if (SPSecurity.AuthenticationMode != System.Web.Configuration.AuthenticationMode.Windows) 

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                fullQuery.AuthenticationType = QueryAuthenticationType.PluggableAuthenticatedQuery; 

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            else

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                fullQuery.AuthenticationType = QueryAuthenticationType.NtAuthenticatedQuery; 

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            ResultTableCollection rt = fullQuery.Execute(); 

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            ResultTable resultTable = rt[ResultType.RelevantResults]; 

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            result.Load(resultTable, LoadOption.OverwriteChanges); 

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        } 

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        return result; 

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    } 

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    #endregion 

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}

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:

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<?xml version="1.0" encoding="utf-8" ?> 

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<QueryPacket xmlns="urn:Microsoft.Search.Query" Revision="1000"> 

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<Query domain="QDomain"> 

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 <SupportedFormats><Format>urn:Microsoft.Search.Response.Document.Document</Format></SupportedFormats> 

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 <Context> 

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   <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> 

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 </Context> 

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 <Range><StartAt>1</StartAt><Count>20</Count></Range> 

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 <EnableStemming>false</EnableStemming> 

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 <TrimDuplicates>true</TrimDuplicates> 

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 <IgnoreAllNoiseQuery>true</IgnoreAllNoiseQuery> 

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 <ImplicitAndBehavior>false</ImplicitAndBehavior> 

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 <IncludeRelevanceResults>true</IncludeRelevanceResults> 

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 <IncludeSpecialTermResults>false</IncludeSpecialTermResults> 

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 <IncludeHighConfidenceResults>false</IncludeHighConfidenceResults> 

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</Query></QueryPacket>

如果sharepoint里item内容语言是en-us的话，一定要在IE浏览器里设置:

把english[en]放到最上面。

作者：spring yang

出处：http://www.cnblogs.com/springyangwc/

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