为List配置一个搜索按钮

查询前的List首页，只有一个cusotmer

customer下面有个Project文件夹和Cusotmer Complaint文件

其中Customer Complaint.txt文件是有多个属性的

现在开始针对文档库中所有的文件 和文件夹进行模糊查询

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="SearchList.ascx.cs" Inherits="MySharePointDev.Public.SearchList" %>
<table>
    <tr>
        <td>
            <asp:Label ID="labKeyWord" runat="server" Text="KeyWord:" Font-Bold="True" ></asp:Label>
            <asp:TextBox ID="tbKeyWord" runat="server" ></asp:TextBox>
            <asp:Button ID="btnSearch" runat="server" onclick="btnSearch_Click" 
                Text="Search" />
        </td>
    </tr>
</table>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebPartPages;
using System.Xml;
using System.Web.UI.WebControls.WebParts;

namespace MySharePointDev.Public
{
    public partial class SearchList : BaseSPWebPart
    {
        private string _QueryFields = "Title;";
        [Personalizable(PersonalizationScope.Shared)]
        [WebBrowsable]
        [WebDisplayName("查询的字段显示名，以分号分隔开")]
        public string QueryFields
        {
            get 
            {
                if (_QueryFields.EndsWith(";"))//防止以;结束
                {
                    return _QueryFields.Substring(0, _QueryFields.Length - 2);
                }
                else
                {
                    return _QueryFields;
                }
            }
            set { _QueryFields = value; }
        }


        private SPList List
        {
            get
            {
                return SPContext.Current.List;
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            //this.ExportMode = WebPartExportMode.All;
            tbKeyWord.ToolTip = "Please input: " + QueryFields;
        }

        /// <summary>
        /// search
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>

        protected void btnSearch_Click(object sender, EventArgs e)
        {
            if (this.tbKeyWord.Text != "")
            {
                string[] fields = QueryFields.Split(';');
                string cmal = "";
                foreach (string field in fields)
                {
                    if (cmal == "") //第一个参数
                    {
                        cmal = string.Format(@"<Contains>
                                                              <FieldRef Name='{0}' />
                                                              <Value Type='{1}'>{2}</Value>
                                                           </Contains>
                                                           ", List.Fields[field].InternalName, List.Fields[field].Type.ToString(), this.tbKeyWord.Text.ToString());
                    }
                    else
                    {
                        cmal = "<Or>" + cmal + string.Format(@"<Contains>
                                                              <FieldRef Name='{0}' />
                                                              <Value Type='{1}'>{2}</Value>
                                                           </Contains></Or>
                                                           ", List.Fields[field].InternalName, List.Fields[field].Type.ToString(), this.tbKeyWord.Text.ToString());
                    }
                    
                }
                cmal = "<Where>" + cmal + "</Where>";
                this.SetCurrentListViewSchemaQuery(cmal);
                
            }

        }

        /// <summary>
        /// 设置当前list的视图 schema query 
        /// </summary>
        /// <param name="cmal"></param>
        private void SetCurrentListViewSchemaQuery(string cmal)
        {
            if (!string.IsNullOrEmpty(cmal))
            {
                string str = "{" + this.List.ID.ToString() + "}";

                ControlCollection cc = this.Page.Controls;
                GetControls(ref  cc, str, cmal);


            }
        }
        /// <summary>
        /// 遍历所有页面中所有控件
        /// </summary>
        /// <param name="cs">页面控件集</param>
        /// <param name="str"></param>
        /// <param name="cmal"></param>
        private void GetControls(ref ControlCollection cs, string str, string cmal)
        {
            foreach (Control webPart in cs)
            {
                if (webPart.HasControls())
                {
                    ControlCollection cc = webPart.Controls;
                    GetControls(ref  cc, str, cmal);
                }

                if (webPart is ListViewWebPart)
                {
                    ListViewWebPart listViewWebPart = (ListViewWebPart)webPart;
                    if (string.Compare(listViewWebPart.ListName, str, true) != 0)
                    {
                        continue;
                    }

                    if (string.IsNullOrEmpty(cmal))
                    {
                        listViewWebPart.ListViewXml = this.List.Views[new Guid(listViewWebPart.ViewGuid)].HtmlSchemaXml;

                    }
                    else
                    {
                        //申明个新的XmlDocument，将listViewWebPart的ListViewXml装载进去
                        XmlDocument xmlDocument = new XmlDocument();
                        xmlDocument.LoadXml(listViewWebPart.ListViewXml);

                        //用cmal替换掉原有的查询语句
                        this.ChangeSchemaXmlCaml(xmlDocument, cmal);
                        listViewWebPart.ListViewXml = xmlDocument.InnerXml;
                    }
                }
            }
        }

        /// <summary>
        /// move where 去除外部的Where和/Where
        /// </summary>
        /// <param name="q"></param>
        /// <returns></returns>
        private string GetInnerQuery(string q)
        {
            XmlDocument docuemnt = new XmlDocument();
            docuemnt.LoadXml(q);
            return docuemnt.DocumentElement.InnerXml;
        }
        /// <summary>
        /// change schema xml query 
        /// </summary>
        /// <param name="xmlDocument"></param>
        /// <param name="query"></param>
        private void ChangeSchemaXmlCaml(XmlDocument xmlDocument, string query)
        {
            if (!string.IsNullOrEmpty(query))
            {
                string innerXml = this.GetInnerQuery(query);
                if (innerXml != "")
                {
                    //获得Query部分的XmlNode
                    XmlNode node = xmlDocument.DocumentElement.SelectSingleNode("Query");
                    XmlNode oldChild = node.SelectSingleNode("Where");

                    //如果有Where，去除它
                    if (oldChild != null)
                    {
                        node.RemoveChild(oldChild);
                    }
                    //新建一个Where，并将我们的query的主体内容赋值给其InnerXml，并在QuerNode中添该Node
                    XmlNode newChild = xmlDocument.CreateElement("Where");
                    newChild.InnerXml = innerXml;
                    node.AppendChild(newChild);

                    //将搜索文件的类型修改为list中的所有文件和文件夹，默认为只搜索当前目录下的文件
                    if (xmlDocument.DocumentElement.Attributes["Scope"] == null)
                    {
                        XmlAttribute attScope = xmlDocument.CreateAttribute("Scope");
                        attScope.Value = "RecursiveAll";
                        xmlDocument.DocumentElement.Attributes.Append(attScope);
                    }
                    else
                    {
                        xmlDocument.DocumentElement.Attributes["Scope"].Value = "RecursiveAll";
                    }
                        
                        
                    //替换XML中的ViewEmpty部分，该部分显示没有数据的时候的内容
                    xmlDocument.DocumentElement.SelectSingleNode("ViewEmpty").InnerXml = "<HTML><![CDATA[<font color='red'><b>No Results match keyword!</b></font>]]></HTML>";
                }

            }
        }


    }
}