新建 文本文档 (16).txt

对页面文件很有用处

  1using System;
  2using System.Data;
  3using System.Configuration;
  4using System.Collections;
  5using System.Web;
  6using System.Web.Security;
  7using System.Web.UI;
  8using System.Web.UI.WebControls;
  9using System.Web.UI.WebControls.WebParts;
 10using System.Web.UI.HtmlControls;
 11using System.Xml;
 12using System.IO;
 13public partial class news_manage2 : System.Web.UI.Page
 14...{
 15    protected void Page_Load(object sender, EventArgs e)
 16    ...{
 17        if (!IsPostBack)
 18        ...{
 19            ReadXML();
 20        }
 21    }
 22    private void ReadXML()
 23    ...{
 24        string url = Server.MapPath("news.xml");//获得当前文件夹下的XML文件
 25        StreamReader sRead = new StreamReader(url, System.Text.Encoding.GetEncoding("GB2312"));
 26        //以一种特定的编码从字节流读取字符,必须要转化成GB2312读取才不能出乱码
 27        XmlDataDocument datadoc = new XmlDataDocument();//操作XML文档
 28        datadoc.DataSet.ReadXml(sRead);//将读取的字节流存到DataSet里面去
 29        this.GridView1.DataSource = datadoc.DataSet.Tables[0].DefaultView;
 30        //以news_id建立索引
 31        this.GridView1.DataBind();
 32        datadoc = null;//清空对XML数据的操作
 33        sRead.Close();//关闭字节流的读取
 34    }
 35
 36    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
 37    ...{
 38        GridView1.PageIndex = e.NewPageIndex;
 39        ReadXML();
 40    }
 41    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
 42    ...{
 43        this.GridView1.EditIndex = e.NewEditIndex;
 44        ReadXML();
 45    }
 46    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
 47    ...{
 48        this.GridView1.EditIndex = -1;
 49        ReadXML();
 50    }
 51    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
 52    ...{
 53        string url = Server.MapPath("news.xml");
 54        string str_id = GridView1.DataKeys[e.RowIndex]["news_id"].ToString();
 55        //获取行信息的索引字段news_id  56        //定义变量title，值赋给“标题”模板列的TextBox1控件
 57        string title = ((TextBox)GridView1.Rows[e.RowIndex].Cells[1].FindControl("TextBox1")).Text;
 58        //定义变量author，值赋给“作者”模板列的TextBox2控件
 59        string author = ((TextBox)GridView1.Rows[e.RowIndex].Cells[2].FindControl("TextBox2")).Text;
 60        //定义变量ly，值赋给“来源”模板列的TextBox3控件
 61        string ly = ((TextBox)GridView1.Rows[e.RowIndex].Cells[3].FindControl("TextBox3")).Text;
 62        XmlDocument xmlDoc = new XmlDocument();
 63        xmlDoc.Load(url); //加载XML文件
 64        XmlNode root = xmlDoc.SelectSingleNode("xinwen");//查找xinwen节点
 65        XmlNodeList xnl = root.ChildNodes; //获取xinwen下面所以子节点
 66        for (int i = 0; i < xnl.Count; i++)
 67        ...{
 68            XmlNodeList xnl11 = xnl.Item(i).SelectNodes("news_id");//查找news_id下面节点集合
 69            XmlElement xe = (XmlElement)xnl11.Item(0); //news_id节点下面的元素
 70            if (xe.InnerText == str_id) //获取节点以及所有子集的串联值
 71            ...{
 72                xe.InnerText = str_id;
 73                xe.ParentNode.ChildNodes.Item(1).InnerText = title;
 74                xe.ParentNode.ChildNodes.Item(2).InnerText = author;
 75                xe.ParentNode.ChildNodes.Item(3).InnerText = ly;
 76            }
 77        }
 78        xmlDoc.Save(url);
 79        this.GridView1.EditIndex = -1;
 80        ReadXML();
 81    }
 82    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
 83    ...{
 84        string url = Server.MapPath("news.xml");
 85        string str_id = GridView1.DataKeys[e.RowIndex]["news_id"].ToString();
 86        XmlDocument xmlDoc = new XmlDocument();
 87        xmlDoc.Load(url); //加载XML文件
 88        XmlNode root = xmlDoc.SelectSingleNode("xinwen");//查找xinwen节点
 89        XmlNodeList xnl = root.ChildNodes; //获取xinwen下面所以子节点
 90        for (int i = 0; i < xnl.Count; i++)
 91        ...{
 92            XmlNodeList xnl11 = xnl.Item(i).SelectNodes("news_id");
 93            //查找username下面节点集合
 94            XmlElement xe = (XmlElement)xnl11.Item(0);
 95            //username节点下面的元素
 96            if (xe.InnerText == str_id) //获取节点以及所有子集的串联值
 97            ...{
 98                root.RemoveChild(xe.ParentNode);//移除指顶节点
 99            }
100        }
101        xmlDoc.Save(url);
102        ReadXML();
103    }
104}