vb.net文件夹备份,如何备份vbios
vb.net怎么实现数据库的复制备份
Access 数据库备份时.需要关闭数据库的连接后才能进行备份操作.也就是复制操作.
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VB.NET备份SQL数据库
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!/spanimg 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!/spanimg 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!/spanimg 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!/spanimg 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=DelFilesource=" + f.Name + "' title='删除备份文件'删除/a | a href='?cmd=Restoresource=" + 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"];
VB.NET 复制文件夹,包括子文件夹 所有文件
用 io.Directory.Exists 判断文件夹是否存在。
再用 My.Computer.FileSystem.CopyDirectory() 复制。
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