静态的空件序列化成XML格式后,用ViewState对象保存[原创]

//原创:西湖浪子
//时间:2006-10-1
//描述:把一个静态的空件,序列化成XML格式后,用ViewState对象保存

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;

namespace WebTest
{
 /// <summary>
 /// TestHtmlTable 的摘要说明。
 /// </summary>
 public class TestHtmlTable : System.Web.UI.Page
 {
  protected System.Web.UI.WebControls.Button Button1;

  private HtmlTable htmltable
  {
   get
   {
    if(ViewState["table"]!=null )
    {
     return DeserializeHtmltable(ViewState["table"].ToString());
    }
    else
    {
     return buildhtmltable();
    }
   }
   set
   {
    ViewState["table"]=serializeHtmltable(value);
   
   }
  
  }
  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此处放置用户代码以初始化页面
   if(!this.IsPostBack)
   {
    HtmlTable _tbl=htmltable;
    this.Controls.Add(_tbl);
   }
   
  }

  private HtmlTable buildhtmltable()
  {
   HtmlTable tbl;
   tbl =new HtmlTable();
   int i=0;
   int j = 5;
   int k = 0;
   for(i=0;i<j;i++)
   {
    HtmlTableRow row = new HtmlTableRow();
    for(k=0; k<j;k++)
    {
     HtmlTableCell cell=new HtmlTableCell();
     cell.InnerHtml = "Cell"+ i.ToString()+","+k.ToString();
     row.Cells.Add(cell);
    }
    tbl.Rows.Add(row);
   }
   return tbl;
  
  }
  private HtmlTable addrowfortable(HtmlTable _tbl)
  {
   HtmlTable tbl;
   tbl =new HtmlTable();
   tbl=_tbl;
   int i=0;
   int j = 5;
   int k = 0;
   for(i=0;i<j;i++)
   {
    HtmlTableRow row = new HtmlTableRow();
    for(k=0; k<j;k++)
    {
     HtmlTableCell cell=new HtmlTableCell();
     cell.InnerHtml = "Cell"+ i.ToString()+","+k.ToString();
     row.Cells.Add(cell);
    }
    tbl.Rows.Add(row);
   }
   return tbl;
  
  }
  #region Web 窗体设计器生成的代码
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
  
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.Button1.Click += new System.EventHandler(this.Button1_Click);
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion
  public string serializeHtmltable(HtmlTable _table)
  {
   System.Xml.XmlDocument doc = new XmlDocument();
   doc.LoadXml("<Jackhtmltable></Jackhtmltable>");

   foreach(HtmlTableRow _row in _table.Rows)
   {
    System.Xml.XmlElement _event =doc.CreateElement("Row");
    foreach(HtmlTableCell _cell in _row.Cells)
    {
     System.Xml.XmlElement _childevent=doc.CreateElement("Row");
     _childevent.InnerText = _cell.InnerHtml;
     _event.AppendChild(_childevent);
    
    }
    doc.DocumentElement.AppendChild(_event);
   }
   return doc.InnerXml;
  
  }
  public HtmlTable DeserializeHtmltable(string _xmltable)
  {
   System.Xml.XmlDocument doc = new XmlDocument();
   doc.LoadXml(_xmltable);
   HtmlTable _tbl=new HtmlTable();
   foreach(XmlNode rownode in doc.GetElementsByTagName("Jackhtmltable").Item(0).ChildNodes)
   {
    HtmlTableRow row = new HtmlTableRow();
    foreach(XmlNode cellnode in rownode.ChildNodes)
    {
     HtmlTableCell cell = new HtmlTableCell();
     cell.InnerHtml= cellnode.InnerText;
     row.Cells.Add(cell);    
    }
    _tbl.Rows.Add(row);
   }
   return _tbl;
  }

  private void Button1_Click(object sender, System.EventArgs e)
  {
   HtmlTable tbl = new HtmlTable();
   tbl= htmltable;
   tbl=addrowfortable(tbl);
   htmltable=tbl;
   this.Controls.Add(tbl);
  }
 }
}