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;
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"><!]></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>
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放到最上面。
作者：spring yang
出处：http://www.cnblogs.com/springyangwc/
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