XML做数据库操作之 我浑了

只前我看邵志东老师的教程做了一个实例 地址是 http://thcjp.cnblogs.com/archive/2006/05/06/392739.html

但是删除的问题始终没有解决,这次做留言本 http://thcjp.cnblogs.com/archive/2006/06/26/435962.html

我实在想不到好办法来维护广告控件使用的那个XML文件,所以想到使用对DataSet操作以达到操作XML文件的目的,具体如下!!

后台CS代码
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
using System.Xml;
using System.Xml.XPath;

public partial class admin_ad : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!IsPostBack)
        fill();
    }
    protected void fill()
    { 
        DataSet ds = new DataSet();
        ds.ReadXml(Server.MapPath("..\\App_Data\\ad.xml"));

        DataList1.DataSource=ds.Tables[0].DefaultView;
        DataList1.DataBind();

        Session["dst"] = ds;
    }
    protected void DataList1_CancelCommand(object source, DataListCommandEventArgs e)
    {//取消
        DataList1.EditItemIndex = -1;
        fill();
    }
    protected void DataList1_DeleteCommand(object source, DataListCommandEventArgs e)
    {//删除事件
        DataSet ds = (DataSet)Session["dst"];
        ds.Tables[0].Rows.Remove(ds.Tables[0].Rows[e.Item.ItemIndex]);//删除了,我晕,太简单了撒!
        
        Session["dst"] = ds;
        ds.WriteXml(Server.MapPath("..\\App_Data\\ad.xml"));

        fill();  
    }
    protected void DataList1_EditCommand(object source, DataListCommandEventArgs e)
    {
        DataList1.EditItemIndex = e.Item.ItemIndex;
        fill();
    }
    protected void DataList1_UpdateCommand(object source, DataListCommandEventArgs e)
    {//修改广告,因为我对ＸＭＬ类的操作确实还不熟练，所以就使用DataSet，反正结果是一样
        DataSet ds = (DataSet)Session["dst"];      

        ds.Tables[0].Rows[e.Item.ItemIndex]["ImageUrl"] = ((TextBox)e.Item.FindControl("TextBox2")).Text.ToString();
        ds.Tables[0].Rows[e.Item.ItemIndex]["NavigateUrl"] = ((TextBox)e.Item.FindControl("TextBox5")).Text.ToString();
        ds.Tables[0].Rows[e.Item.ItemIndex]["AlternateText"] = ((TextBox)e.Item.FindControl("TextBox1")).Text.ToString();
        ds.Tables[0].Rows[e.Item.ItemIndex]["Keyword"] = ((TextBox)e.Item.FindControl("TextBox3")).Text.ToString();
        ds.Tables[0].Rows[e.Item.ItemIndex]["Impressions"] = ((TextBox)e.Item.FindControl("TextBox4")).Text.ToString();

         Session["dst"] = ds;
        ds.WriteXml(Server.MapPath("..\\App_Data\\ad.xml"));

        DataList1.EditItemIndex = -1;
        fill();     
    }
    protected void Button5_Click(object sender, EventArgs e)
    {//新增广告
        DataSet ds = (DataSet)Session["dst"];
        DataRow dr = ds.Tables[0].NewRow();

        dr["ImageUrl"] = url.Text.ToString();
        dr["NavigateUrl"] = ng.Text.ToString();        
        dr["AlternateText"] = na.Text.ToString();
        dr["Keyword"] = kw.Text.ToString();
        dr["Impressions"] = qz.Text.ToString();

        ds.Tables[0].Rows.Add(dr);
        Session["dst"] = ds;

        ds.WriteXml(Server.MapPath("..\\App_Data\\ad.xml"));
        fill();
    }
    protected void LinkButton1_Click(object sender, EventArgs e)
    {//上传图片第一步
        DIV1.Visible = true;
    }
    protected void Button6_Click(object sender, EventArgs e)
    {//上传图片第二步
        string name = fu.FileName.ToString();//得到文件名字
        int cut = Convert.ToInt32(fu.PostedFile.ContentLength);//文件大小
        string typ = fu.PostedFile.ContentType.ToString();
        string typp = typ.Substring(0,5);

        if (typp == "image")
        {
            if (cut < Convert.ToInt32(odb.scr("Select adcut from config")))
            {
                fu.PostedFile.SaveAs(Server.MapPath("../images/") + "\\" + name);
                img.ImageUrl = (Server.MapPath("../images/") + "\\" + name);
                url.Text = (Server.MapPath("../images/") + "\\" + name);
            }
            else
            { 
                url.Text = "只是个广告，图片有必要那么大吗？";
            }
        }
        else
        {
            url.Text = "不被允许的类型";
        }
    }
}

前台HTML代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ad.aspx.cs" Inherits="admin_ad" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
    <link href="../images/news.css" rel="stylesheet" type="text/css" />
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:DataList ID="DataList1" runat="server" CellPadding="4" ForeColor="#333333" OnCancelCommand="DataList1_CancelCommand" OnDeleteCommand="DataList1_DeleteCommand" OnEditCommand="DataList1_EditCommand" OnUpdateCommand="DataList1_UpdateCommand">
            <ItemTemplate>
                <table width="500">
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                            广告名称</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff;" colspan="2">
                            <asp:Label ID="Label1" runat="server" Text='<%# Eval("AlternateText") %>'></asp:Label></td>
                    </tr>
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                            图片地址</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff;" colspan="2">
                            <asp:Label ID="Label2" runat="server" Text='<%# Eval("ImageUrl") %>'></asp:Label></td>
                    </tr>
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                            关键词</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff;" colspan="2">
                            <asp:Label ID="Label3" runat="server" Text='<%# Eval("Keyword") %>'></asp:Label></td>
                    </tr>
                        <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                            显示权重</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff;" colspan="2">
                            <asp:Label ID="Label4" runat="server" Text='<%# Eval("Impressions") %>'></asp:Label></td>
                    </tr>
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed; height: 22px">
                            广告指向</td>
                        <td colspan="2" style="width: 400px; border-bottom: #0099ff 1px dashed; height: 22px;
                            background-color: #99ccff">
                            <a href='<%# Eval("NavigateUrl") %>' target=_blank><asp:Label ID="Label5" runat="server" Text='<%# Eval("NavigateUrl") %>'></asp:Label></a></td>
                    </tr>
                    <tr>
                        <td align="center" colspan="3" style="border-bottom: #0099ff 1px dashed; height: 27px;
                            background-color: #99ccff">
                            <asp:Button ID="Button1" runat="server" CommandName="edit" Text="修改广告" />
                            <asp:Button ID="Button2" runat="server" CommandName="delete" Text="删除广告" /></td>
                    </tr>
                </table>
            </ItemTemplate>
            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <SelectedItemStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
            <AlternatingItemStyle BackColor="White" />
            <ItemStyle BackColor="#EFF3FB" />
            <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <EditItemTemplate>
                <table width="500">
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                            广告名称</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff;" colspan="2">
                            <asp:TextBox ID="TextBox1" runat="server" Text='<%# Eval("AlternateText") %>'></asp:TextBox></td>
                    </tr>
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                            图片地址</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff;" colspan="2">
                            <asp:TextBox ID="TextBox2" runat="server" Text='<%# Eval("ImageUrl") %>'></asp:TextBox></td>
                    </tr>
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                            关键词</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff;" colspan="2">
                            <asp:TextBox ID="TextBox3" runat="server" Text='<%# Eval("Keyword") %>'></asp:TextBox></td>
                    </tr>
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed; height: 27px;">
                            显示权重</td>
                        <td style="width: 400px; border-bottom: #0099ff 1px dashed; background-color: #99ccff; height: 27px;" colspan="2">
                            <asp:TextBox ID="TextBox4" runat="server" Text='<%# Eval("Impressions") %>'></asp:TextBox></td>
                    </tr>
                    <tr>
                        <td style="width: 100px; border-bottom: #0099ff 1px dashed; height: 27px">
                            广告指向</td>
                        <td colspan="2" style="width: 400px; border-bottom: #0099ff 1px dashed; height: 27px;
                            background-color: #99ccff">
                            <asp:TextBox ID="TextBox5" runat="server" Text='<%# Eval("NavigateUrl") %>'></asp:TextBox></td>
                    </tr>
                    <tr>
                        <td align="center" colspan="3" style="border-bottom: #0099ff 1px dashed; background-color: #99ccff">
                            <asp:Button ID="Button3" runat="server" CommandName="update" Text="更新" />
                            <asp:Button ID="Button4" runat="server" CommandName="cancel" Text="取消" /></td>
                    </tr>
                </table>
            </EditItemTemplate>
        </asp:DataList>&nbsp;<table width="500">
            <tr>
                <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                    广告名称</td>
                <td style="width: 400px; border-bottom: #0099ff 1px dashed;" colspan="2">
                    <asp:TextBox ID="na" runat="server" Text='<%# Eval("AlternateText") %>'></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                    图片地址</td>
                <td style="width: 400px; border-bottom: #0099ff 1px dashed;" colspan="2">
                    <asp:TextBox ID="url" runat="server" Text='<%# Eval("ImageUrl") %>'></asp:TextBox>
                    <asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">上传图片</asp:LinkButton>
                    <div id="DIV1" runat="server" style="width: 400px; height: 100px" visible="false">
                        <table style="width: 400px; height: 100px">
                            <tr>
                                <td colspan="2" style="height: 55px">
                                    <asp:Image ID="img" runat="server" Height="50px" Width="400px" /></td>
                            </tr>
                            <tr>
                                <td style="width:300px">
                                    <asp:FileUpload ID="fu" runat="server" Width="287px" /></td>
                                <td style="width: 100px">
                                    <asp:Button ID="Button6" runat="server" OnClick="Button6_Click" Text="上传" /></td>
                            </tr>
                        </table>
                    </div>
                </td>
            </tr>
            <tr>
                <td style="width: 100px; border-bottom: #0099ff 1px dashed;">
                    关键词</td>
                <td style="width: 400px; border-bottom: #0099ff 1px dashed;" colspan="2">
                    <asp:TextBox ID="kw" runat="server" Text='<%# Eval("Keyword") %>'></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 100px; border-bottom: #0099ff 1px dashed; height: 27px;">
                    显示权重</td>
                <td style="width: 400px; border-bottom: #0099ff 1px dashed;" colspan="2">
                    <asp:TextBox ID="qz" runat="server" Text='<%# Eval("Impressions") %>'></asp:TextBox></td>
            </tr>
            <tr>
                <td style="width: 100px; border-bottom: #0099ff 1px dashed; height: 27px">
                    广告指向</td>
                <td colspan="2" style="width: 400px; border-bottom: #0099ff 1px dashed">
                    <asp:TextBox ID="ng" runat="server"></asp:TextBox></td>
            </tr>
            <tr>
                <td align="center" colspan="3" style="border-bottom: #0099ff 1px dashed; background-color: #99ccff">
                    <asp:Button ID="Button5" runat="server" OnClick="Button5_Click" Text="增加" /></td>
            </tr>
        </table>
    </div>
    </form>
</body>
</html>