简单xml 留言本

Message.xml

<?xml version="1.0" encoding="utf-8"?>
<body num="1">
<message>
    <ID>1</ID>
    <username>fasfd</username>
    <content>asdfsadf</content>
    <addtime>2010-08-09 17:58:05</addtime>
    <isdel>0</isdel>
</message>

</body>

读取xml绑定repeater

代码

protected void messagebind() {
            DataTable dt = new DataTable("dt");
            DataColumn dc = new DataColumn("ID");
            dt.Columns.Add(dc);
            dc = new DataColumn("username");
            dt.Columns.Add(dc);
            dc = new DataColumn("content");
            dt.Columns.Add(dc);
            dc = new DataColumn("addtime");
            dt.Columns.Add(dc);
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(Server.MapPath("Message.xml"));

            XmlNodeList xnl = xmlDoc.SelectNodes("//body/message[isdel='0']");//条件
            for (int i = 0; i < xnl.Count; i++)
            {
                  string id = xnl.Item(i).ChildNodes[0].InnerText;
                  string username = xnl.Item(i).ChildNodes[1].InnerText;
                  string content = xnl.Item(i).ChildNodes[2].InnerText;
                  string addtime = xnl.Item(i).ChildNodes[3].InnerText;
                  DataRow dr = dt.NewRow();
                  dr["ID"] = id;
                  dr["username"] = username;
                  dr["content"] = content;
                  dr["addtime"] = addtime;
                  dt.Rows.Add(dr);
            }


            ViewState["RecordCount"] =dt.Rows.Count ; //记录数
            ViewState["PageSize"] = 3;
             ViewState["PageIndex"] = Common.Request.GetInt("p",1);
            if ( Convert.ToInt32( ViewState["PageIndex"]) > (Convert.ToInt32(ViewState["RecordCount"]) / Convert.ToInt32(ViewState["PageSize"]) + 1))
            {
                  ViewState["PageIndex"] = 1;
            }

            this.repeater1.DataSource = GetPagedTable(dt, Convert.ToInt32(ViewState["PageIndex"]), Convert.ToInt32(ViewState["PageSize"]));
            this.repeater1.DataBind();
            this.CustomPager1.UrlManager = new DefaultUrlManager(Convert.ToInt32(ViewState["RecordCount"]), Convert.ToInt32(ViewState["PageSize"]), "p");


      }

添加：

代码protected void Button1_Click(object sender, EventArgs e)
      {
            string username = this.txt_username.Text.Trim();
            string content = this.txt_content.Text.Trim();

            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(Server.MapPath("Message.xml"));    //加载文件 
            XmlNode root = xmlDoc.SelectSingleNode("body");//查找<dbGuest> 
            XmlElement xml_message= xmlDoc.CreateElement("message");//创建一个<community>节点 
            XmlElement xml_ID = xmlDoc.CreateElement("ID");//创建一个<community>节点 
            XmlElement xml_username = xmlDoc.CreateElement("username");//创建一个<community>节点 
            XmlElement xml_content = xmlDoc.CreateElement("content");//创建一个<community>节点 
            XmlElement xml_addtime = xmlDoc.CreateElement("addtime");//创建一个<community>节点 
             XmlElement xml_isdel = xmlDoc.CreateElement("isdel");//创建一个<isdel>节点 

            string num = root.Attributes["num"].Value; //body 的num属性表示总数
            xml_ID.InnerText = Convert.ToString(Convert.ToInt32(num) + 1);
            root.Attributes["num"].Value = xml_ID.InnerText;
            xml_username.InnerText = username;
            xml_content.InnerText = content;
            xml_addtime.InnerText = DateTime.Now.ToString();
             xml_isdel.InnerText = "0";

             xml_message.AppendChild(xml_ID);
             xml_message.AppendChild(xml_username);
             xml_message.AppendChild(xml_content);
             xml_message.AppendChild(xml_addtime);
             xml_message.AppendChild(xml_isdel);
             root.PrependChild(xml_message);
             xmlDoc.Save(Server.MapPath("Message.xml"));    //保存文件 
             this.txt_content.Text = string.Empty;
            this.txt_username.Text=string.Empty;
            // Common.JsUtil.ShowMsg("提交成功!", "Default.aspx");
             messagebind();
      }

删除：

代码 protected void repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
      {
            if (e.CommandName=="del")
            {
                  string id = e.CommandArgument.ToString();
                  ////Response.Write(id);
                  //this.Label1.Text = id;
                  XmlDocument xmlDoc = new XmlDocument();
                  xmlDoc.Load(Server.MapPath("Message.xml"));

                  XmlNodeList xnl = xmlDoc.SelectNodes(string.Format("//body/message[ID='{0}']",id));//条件
                  xnl.Item(0).ChildNodes[4].InnerText = "1";

                  xmlDoc.Save(Server.MapPath("Message.xml"));    //保存文件 
                  messagebind();
            }
      }

代码public DataTable GetPagedTable(DataTable dt, int PageIndex, int PageSize)
      {
            if (PageIndex == 0)
                  return dt;
            DataTable newdt = dt.Copy();
            newdt.Clear();

            int rowbegin = (PageIndex - 1) * PageSize;
            int rowend = PageIndex * PageSize;

            if (rowbegin >= dt.Rows.Count)
                  return newdt;

            if (rowend > dt.Rows.Count)
                  rowend = dt.Rows.Count;
            for (int i = rowbegin; i <= rowend - 1; i++)
            {
                  DataRow newdr = newdt.NewRow();
                  DataRow dr = dt.Rows[i];
                  foreach (DataColumn column in dt.Columns)
                  {
                        newdr[column.ColumnName] = dr[column.ColumnName];
                  }
                  newdt.Rows.Add(newdr);
            }

            return newdt;
      }

写的不好，请高手多多指教

posted on 2010-08-10 09:28 princeback 阅读(188) 评论(0) 编辑收藏举报