背头怎么吹教学视频:用vb.net对sql多数据库压缩备份为一个文件

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.IO;
using System.Text;

using _5dRss.Const;
using _5dRss.lib.Data.Tool;

public partial class admin_admin_dbmanage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//生成备份文件列表
ListBackupFiles();

if (!Page.IsPostBack)
{
Showmsg.Visible = false;

//数据库路径
lilDBPath.Text = HttpContext.Current.Request.PhysicalApplicationPath + "App_Data\\" + ConfigurationSettings.AppSettings["DBFile"];

//新建一个 FileInfo 对象，并获得数据库文件的大小，然后转换单位为KB
FileInfo myFileInfo = new FileInfo(lilDBPath.Text);
lilDBSize.Text = Convert.ToString(myFileInfo.Length/1024) + " KB";

//如果两个参数都不为空，则继续执行
if (Request.QueryString["cmd"] != null && Request.QueryString["source"] != null)
{
//备份数据库原文件名
string sourceFileName = Request.QueryString["source"];

//如果 cmd 参数为 DelFile
if (Request.QueryString["cmd"].Equals("DelFile"))
{
//删除备份数据库文件
File.Delete(HttpContext.Current.Request.PhysicalApplicationPath + "Backup\\" + sourceFileName);

//刷新备份文件列表
ListBackupFiles();

Showmsg.Visible = true;
Showmsg.Text = "<div align='center' style='margin-bottom:8px;'><img src='images/aL.gif' style='margin-bottom:-6px;'/><span class='alertTxt'>删除备份数据库成功!</span><img src='images/aR.gif' style='margin-bottom:-6px;'/></div>";
}

//如果 cmd 参数为 Restore
if (Request.QueryString["cmd"].Equals("Restore"))
{
//用备份文件覆盖原文件
File.Copy(HttpContext.Current.Request.PhysicalApplicationPath + "Backup\\" + sourceFileName, HttpContext.Current.Request.PhysicalApplicationPath + "App_Data\\" + ConfigurationSettings.AppSettings["DBFile"], true);

//刷新备份文件列表
ListBackupFiles();

Showmsg.Visible = true;
Showmsg.Text = "<div align='center' style='margin-bottom:8px;'><img src='images/aL.gif' style='margin-bottom:-6px;'/><span class='alertTxt'>还原备份数据库成功!</span><img src='images/aR.gif' style='margin-bottom:-6px;'/></div>";
}
}
}
}

protected void lnkbtnCompactDB_Click(object sender, EventArgs e)
{
//压缩修复数据库
AccessDBtool.CompactAccessDB(SysConfig.ConnectionString, HttpContext.Current.Request.PhysicalApplicationPath + "App_Data\\" + ConfigurationSettings.AppSettings["DBFile"]);

Showmsg.Visible = true;
Showmsg.Text = "<div align='center' style='margin-bottom:8px;'><img src='images/aL.gif' style='margin-bottom:-6px;'/><span class='alertTxt'>压缩修复数据库成功!</span><img src='images/aR.gif' style='margin-bottom:-6px;'/></div>";
}

protected void lnkbtnBackupDB_Click(object sender, EventArgs e)
{
string sourceFileName = HttpContext.Current.Request.PhysicalApplicationPath + "App_Data\\" + ConfigurationSettings.AppSettings["DBFile"];
string destFileName = HttpContext.Current.Request.PhysicalApplicationPath + "Backup\\" + "Backup_";
destFileName += DateTime.Now.ToString("yyyyMMddHHmmss");
destFileName += ".mbk";

//将数据库文件Copy到Backup目录，如果有重名文件就覆盖原文件
File.Copy(sourceFileName, destFileName, true);

//生成备份文件列表
ListBackupFiles();

Showmsg.Visible = true;
Showmsg.Text = "<div align='center' style='margin-bottom:8px;'><img src='images/aL.gif' style='margin-bottom:-6px;'/><span class='alertTxt'>备份数据库成功!</span><img src='images/aR.gif' style='margin-bottom:-6px;'/></div>";
}

/// <summary>
/// 生成备份文件列表
/// </summary>
/// <returns>文件列表，文件详细信息及操作选项的HTML代码</returns>
public void ListBackupFiles()
{
//如果目录不存在则创建次目录
if (!Directory.Exists(HttpContext.Current.Request.PhysicalApplicationPath + "Backup\\"))
Directory.CreateDirectory(HttpContext.Current.Request.PhysicalApplicationPath + "Backup\\");

DirectoryInfo mydir = new DirectoryInfo(HttpContext.Current.Request.PhysicalApplicationPath + "Backup\\");
StringBuilder sb = new StringBuilder();

foreach (FileInfo f in mydir.GetFiles())
{
sb.Append("<a href='backup/" + f.Name + "' target='_blank'><img border='0' src='images/mdb.gif' style='margin:4px 3px -3px 0px'/>" + f.Name + "</a>  <a href='?cmd=DelFile&source=" + f.Name + "' title='删除备份文件'>删除</a> | <a href='?cmd=Restore&source=" + f.Name + "' title='删除备份文件'>还原数据库</a> | " + f.Length/1024 + " KB | " + f.CreationTime + "<br />");
}

lilBackupFileList.Text = sb.ToString();
}
}
把下面这句换成你的数据库地址：
//数据库路径
// lilDBPath.Text = HttpContext.Current.Request.PhysicalApplicationPath + "App_Data\\" + ConfigurationSettings.AppSettings["DBFile"];

不错!!不错!!不错!!