WSS[sharepoint]中如何建立一个搜索的功能的webpart[Search]

with Windows sharepoint service, how to build a webpart to support search one list of a web site.

这个webpart的使用必须让MSSQL支持全文索引才行。
在sql客户端运行
sp_fulltext_database 'enable'

使用时要小心。如果已经存在全文目录，那么该过程将除去所有的全文目录，重新创建系统表中指明的任何全文索引，并且将数据库标记为已全文启用。

这个webpart例子是显示一个站点所有的list，并把每个list的field显示出来，同时根据输入查询的字符串来查询这个list的记录。
[如何创建webpart和如何加入webpart到wss中去这里就不介绍了。]
下面给完整代码

/**//*written by King_astar on 2005.5.14
 * test search object in wws
*/

using System;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Serialization;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.WebPartPages;
using Microsoft.SharePoint.WebControls;

using System.Data;

namespace TestWebPartSearch
{
    /**//// <summary>
    /// Description for WebPart1.
    /// </summary>
    [DefaultProperty("Text"),
        ToolboxData("<{0}:MySearchPart runat=server></{0}:MySearchPart>"),
        XmlRoot(Namespace="TestWebPartSearch")]
    public class MySearchPart : Microsoft.SharePoint.WebPartPages.WebPart
    {
        private const string defaultText = "";
        private String _searchStr ="";
        private DataGrid mydatagrid ;
        private Button serarchBtn;
        private DropDownList selectdrp;
        private DropDownList fielddrp;

        private TextBox searchTxt;
        private String _searchColumn ="title";
        private SPSite _spsite;
        private SPWeb _spweb;


        private string text = defaultText;

        properties#region properties
        [Browsable(true),
            Category("Miscellaneous"),
            DefaultValue(defaultText),
            WebPartStorage(Storage.Personal),
            FriendlyName("List Item"),
            Description("Text Property")]
        public string Text
        {
            get
            {
                return text;
            }

            set
            {
                text = value;
            }
        }

    
        #endregion

        constructor#region constructor
        public MySearchPart()
        {
            _spsite =  new SPSite("http://172.16.1.212/");
            this._spweb =   _spsite.OpenWeb();
            SPListCollection splists = _spweb.Lists;
            serarchBtn = new Button();
            selectdrp = new DropDownList();
            searchTxt = new TextBox();
            fielddrp = new DropDownList();
            mydatagrid = new DataGrid();
            this.Controls.Add(new LiteralControl("Pls Select List:"));
            this.Controls.Add(selectdrp);
            this.Controls.Add(new LiteralControl("<br/>"));
            this.Controls.Add(fielddrp);
            this.Controls.Add(searchTxt);
            this.Controls.Add(serarchBtn);
            this.Controls.Add(mydatagrid);

            serarchBtn.Text = " search Now";
            serarchBtn.Click +=new EventHandler(serarchBtn_Click);
            for(int i=0;i<splists.Count;i++)
            {
                ListItem one = new ListItem();
                one.Value = splists[i].Title;
                one.Text  =  splists[i].Title;
                selectdrp.Items.Add(one);

            }
            selectdrp.AutoPostBack = true;
            selectdrp.SelectedIndexChanged +=new EventHandler(selectdrp_SelectedIndexChanged);
            


            

        }
        #endregion
        
        /**//// <summary>
        ///    This method gets the custom tool parts for this Web Part by overriding the
        ///    GetToolParts method of the WebPart base class. You must implement
        ///    custom tool parts in a separate class that derives from 
        ///    Microsoft.SharePoint.WebPartPages.ToolPart. 
        ///    </summary>
        ///<returns>An array of references to ToolPart objects.</returns>
//        public override ToolPart[] GetToolParts()
//        {
//            ToolPart[] toolparts = new ToolPart[2];
//            WebPartToolPart wptp = new WebPartToolPart();
//            CustomPropertyToolPart custom = new CustomPropertyToolPart();
//            toolparts[0] = wptp;
//            toolparts[1] = custom;
//            return toolparts;
//        }
        
        /**//// <summary>
        /// Render this Web Part to the output parameter specified.
        /// </summary>
        /// <param name="output"> The HTML writer to write out to </param>
//        protected override void RenderWebPart(HtmlTextWriter output)
//        {
//            
//
//
//            output.Write(SPEncode.HtmlEncode(Text));
//        }

        protected override void CreateChildControls()
        {
            base.CreateChildControls ();
        }

        private void serarchBtn_Click(object sender, EventArgs e)
        {
            
            
            String temp = fielddrp.SelectedValue;
            string typeStr = "";
            this._searchColumn = temp.Split(',')[0];
            typeStr =  temp.Split(',')[1];
            this._searchStr = searchTxt.Text.Trim();
            //searchTxt.Text = temp;



            SPList splist = _spweb.Lists[selectdrp.SelectedIndex];
            SPQuery spquery = new SPQuery();
            spquery.Query = "<Where><Eq><FieldRef Name=\""+_searchColumn+"\"/>"+ "<Value Type=\""+typeStr+"\">"+_searchStr+"</Value></Eq></Where>";
            SPListItemCollection splistitems;
            splistitems = splist.GetItems(spquery);
            DataTable dt = new  DataTable();
            dt.Columns.Add(new DataColumn("ID",typeof(String)));
            dt.Columns.Add(new DataColumn("XML",typeof(String)));

            for(int i =0;i<splistitems.Count;i++)
            {
                DataRow row = dt.NewRow();
                row["ID"]        = splistitems[i].ID;
                row["XML"]  = this.Page.Server.HtmlEncode(splistitems[i].Xml);
                dt.Rows.Add(row);
            }
            

            
            mydatagrid.DataSource = dt;
            mydatagrid.DataBind();




        }

        private void selectdrp_SelectedIndexChanged(object sender, EventArgs e)
        {
            SPList splist = _spweb.Lists[selectdrp.SelectedIndex];
            SPFieldCollection spfields = splist.Fields;
            for(int i=0;i<spfields.Count;i++)
            {
                ListItem one = new ListItem();
                one.Value = spfields[i].InternalName+","+ spfields[i].TypeAsString;
                one.Text  = spfields[i].Title;
                fielddrp.Items.Add(one);

            }

        }
    }
}