XML常用操作之一

using  System;
using  System.Data;
using  System.Configuration;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;
public   partial   class  _Default : System.Web.UI.Page 
... {
    protected void Page_Load(object sender, EventArgs e)
    ...{
    }
    //读取数据
    protected void Button1_Click(object sender, EventArgs e)
    ...{
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath("book.xml"));
        if (ds.Tables.Count > 0)
        ...{
            this.GridView1.DataSource = ds;
            this.GridView1.DataBind();
        }
    }
    //过滤数据
    protected void Button2_Click(object sender, EventArgs e)
    ...{
        DataSet ds = new DataSet();
        ds.ReadXmlSchema(Server.MapPath("book.xsd"));
        ds.ReadXml(Server.MapPath("book.xml"));
        
        DataView dv = new DataView(ds.Tables[0]);
       dv.Sort = "price desc";
        //dv.RowFilter = "title = 'database设计'";
        this.GridView1.DataSource = dv;
        this.GridView1.DataBind();
    }
    //添加记录
    protected void Button3_Click(object sender, EventArgs e)
    ...{
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath("book.xml"));
        ds.ReadXmlSchema(Server.MapPath("book.xsd"));
        DataTable dt = ds.Tables[0];
        DataRow dr = dt.NewRow();
        dr[0] = "1";
        dr[1] ="2";
        dr[2] = "3";
        dt.Rows.Add(dr);
      //  ds.Tables.Add(dt);
        ds.WriteXml(Server.MapPath("book.xml"));
        this.GridView1.DataSource = ds;
        this.GridView1.DataBind();
    }
    //更新数据
    protected void Button4_Click(object sender, EventArgs e)
    ...{
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath("book.xml"));
        ds.ReadXmlSchema(Server.MapPath("book.xsd"));
        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
        ...{
            if (ds.Tables[0].Rows[i]["title"].ToString().Trim() == "asp.net")
            ...{
                for (int j = 0; j < ds.Tables[0].Columns.Count; j++)
                ...{
                    ds.Tables[0].Rows[i][j] = j;
                }
            }
        }
        ds.AcceptChanges();
        ds.WriteXml(Server.MapPath("book.xml"));
          this.GridView1.DataSource = ds;
        this.GridView1.DataBind();
    }
    protected void Button5_Click(object sender, EventArgs e)
    ...{
        this.del(10);
    }
    //删除记录
    private void del(int  strid)
    ...{
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath("book.xml"));
        ds.ReadXmlSchema(Server.MapPath("book.xsd"));
        ds.Tables[0].Rows[strid].Delete();
        ds.AcceptChanges();
        ds.WriteXml(Server.MapPath("book.xml"));
        this.GridView1.DataSource = ds;
        this.GridView1.DataBind();
    }
}