列表查询WebPart

SmartListSearchWebPart
简单列表查询WebPart.本代码只是一个简单的Demo,代码没有实际的价值,但是很有学习价值.
在项目中可以得到很好的应用!


输入key





Code :

using System;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Serialization;
using System.Xml;

using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.WebPartPages;

namespace SmartListSearchWebPart
{
    [Guid("34903418-36da-45cb-ae81-27cd82b628dd")]
    public class SmartListSearchWebPart : System.Web.UI.WebControls.WebParts.WebPart
    {
        public SmartListSearchWebPart()
        {
            this.ExportMode = WebPartExportMode.All;
        }

        private Button btnSearch;
        private TextBox tbKey;
        /// <summary>
        /// create child controls
        /// </summary>
        protected override void CreateChildControls()
        {
            btnSearch = new Button();
            btnSearch.Text = "查询";
            btnSearch.Click += new EventHandler(btnSearch_Click);
            this.Controls.Add(btnSearch);

            tbKey = new TextBox();
            this.Controls.Add(tbKey);

            base.CreateChildControls();
        }

        private SPList List
        {
            get
            {
                return SPContext.Current.List;
            }
        }
        /// <summary>
        /// search
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void btnSearch_Click(object sender, EventArgs e)
        {
  
            if (this.tbKey.Text != "")
            {
                string cmal = string.Format("<Where><Contains><FieldRef Name='Title' /><Value Type='Text'>{0}</Value></Contains></Where>", this.tbKey.Text.ToString());
                this.SetCurrentListViewSchemaQuery(cmal);
            }
           

        }
        /// <summary>
        /// set current list view schema query
        /// </summary>
        /// <param name="cmal"></param>
        private void SetCurrentListViewSchemaQuery(string cmal)
        {
            if (!string.IsNullOrEmpty(cmal))
            {
                string str = "{" +this.List.ID.ToString() +"}";

               
                foreach (System.Web.UI.WebControls.WebParts.WebPart webPart in base.Zone.WebParts)
                {
                    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
                        {
                            XmlDocument xmlDocument = new XmlDocument();
                            xmlDocument.LoadXml(listViewWebPart.ListViewXml);
                            this.ChangeSchemaXmlCaml(xmlDocument, cmal);
                            listViewWebPart.ListViewXml = xmlDocument.InnerXml;
                        }
                    }
                }
            }
        }
        /// <summary>
        /// move 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 != "")
                {
                    XmlNode node = xmlDocument.DocumentElement.SelectSingleNode("Query");
                    XmlNode oldChild = node.SelectSingleNode("Where");

                    if (oldChild != null)
                    {
                        node.RemoveChild(oldChild);
                    }

                    XmlNode newChild = xmlDocument.CreateElement("Where");
                    newChild.InnerXml = innerXml;
                    node.AppendChild(newChild);
                    xmlDocument.DocumentElement.SelectSingleNode("ViewEmpty").InnerXml = "<HTML><![CDATA[<font color='red'><b>AA Say:未找到符合查询条件的记录。</b></font>]]></HTML>";
                }

            }
        }
        /// <summary>
        /// render
        /// </summary>
        /// <param name="writer"></param>
        protected override void Render(HtmlTextWriter writer)
        {
            writer.Write("<table><tr><td>");
            writer.Write("关键字：");
            tbKey.RenderControl(writer);
            btnSearch.RenderControl(writer);
            writer.Write("</td></tr></table>");
        }
    }
}

这个webPart 核心就是修改它的Scheam就OK
listViewWebPart.ListViewXml = xmlDocument.InnerXml;（主要代码）