winform程序,备份数据库+并压缩+并删除以前的备份
说明:为了定时备份服务器上的数据库并压缩到指定目录,方便下载到本地而写本程序。配合windows的任务计划,可以达到定时备份数据库的目的。
程序需引用SQLDMO.DLL,如电脑上已安装sqlserver,可在C:\Program Files\Microsoft SQL Server\80\Tools\Binn\找到
string ServerName = System.Configuration.ConfigurationSettings.AppSettings["ServerName"];//数据库服务器名
string UserName = System.Configuration.ConfigurationSettings.AppSettings["UserName"];//数据库用户名
string Password = System.Configuration.ConfigurationSettings.AppSettings["Password"];//密码
string strDbName = System.Configuration.ConfigurationSettings.AppSettings["strDbName"];//数据库名
string FilePathBak = System.Configuration.ConfigurationSettings.AppSettings["FilePathBak"];//备份后的文件保存路径(.bak),不包括文件名
string FilePathRar = System.Configuration.ConfigurationSettings.AppSettings["FilePathRar"];//压缩文件保存的路径,这里不包括压缩后的文件名
public Form1()
{
InitializeComponent();
bool backup = BackUPDB(ServerName, UserName, Password, strDbName, FilePathBak);
if (backup)
{
rar(FilePathBak, FilePathRar);
del();
}
System.Environment.Exit(0);// 这是最彻底的退出方式,不管什么线程都被强制退出,把程序结束的很干净。
}
/// <summary>
/// 备份数据库
/// </summary>
/// <param name="ServerName">服务器名</param>
/// <param name="UserName">登录账号</param>
/// <param name="Password">密码</param>
/// <param name="strDbName">待备份的数据库名</param>
/// <param name="FilePathBak">备份后的文件保存路径</param>
/// <returns></returns>
public bool BackUPDB(string ServerName, string UserName, string Password, string strDbName, string FilePathBak)
{
SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
SQLDMO.Backup bak = new SQLDMO.BackupClass();
try
{
svr.LoginSecure = false;
svr.Connect(ServerName, UserName, Password);
bak.Action = 0; //SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
bak.Initialize = true;
bak.Files = FilePathBak + strDbName + System.DateTime.Now.ToString("yyyyMMdd") + ".bak";//备份后的文件保存路径+文件名(F:\\databack\\fireweb20100810.bak)
bak.Database = strDbName;
bak.BackupSetName = strDbName;
bak.BackupSetDescription = "数据库备份";
bak.SQLBackup(svr);
return true;
}
catch (Exception err)
{
throw (new Exception("备份数据库失败" + err.Message));
}
finally
{
svr.DisConnect();
}
}
/// <summary>
/// 压缩指定文件到指定文件夹
/// </summary>
/// <param name="path">被压缩的文件的路径,文件本身在方法中写明,因为文件名要由当前时间判断</param>
/// <param name="rarPath">压缩后的保存路径</param>
/// <returns></returns>
public bool rar(string path, string rarPath)
{
bool flag = false;
System.Diagnostics.Process Pc1 = new System.Diagnostics.Process();
Pc1.StartInfo.FileName = "Winrar.exe";
Pc1.StartInfo.CreateNoWindow = false;
string fileName = strDbName + System.DateTime.Now.ToString("yyyyMMdd")+".bak";
string rarFileName = strDbName + System.DateTime.Now.ToString("yyyyMMdd") + ".rar";
path += fileName;//解压前的文件路径+文件名
rarPath += rarFileName;//解压后的路径+文件名
Pc1.StartInfo.Arguments = " a -ep " + rarPath + " " + path;//-ep 表示:从名称中排除路径,即压缩时不带各层目录
Pc1.Start();
if (Pc1.HasExited)
{
int iExitCode = Pc1.ExitCode;
if (iExitCode == 0)
{
flag = true;
}
else
{
flag = false;
}
Pc1.Kill();
Pc1.Close();
Pc1.Dispose();
}
return flag;
}
/// <summary>
/// 由于每天备份一次,所以要把多余的备份文件和压缩文件删除,只保留最新的5个
/// </summary>
public void del()
{
//删除bak文件
int count1 = 0;
ArrayList al1 = new ArrayList();
DirectoryInfo diPathBak = new DirectoryInfo(FilePathBak);
foreach (FileInfo fi in diPathBak.GetFiles())
{
if (fi.Name.Length > 12)//每个备份的bak的文件名长度一定会大于12(20100808.bak)
{
if (fi.Name.Substring(0, fi.Name.Length - fi.Extension.Length - 8).Equals(strDbName) && fi.Extension.Equals(".bak"))
{
count1++;
al1.Add(fi.Name);
if (count1 > 5)
{
string filename = al1[0].ToString();//删除第一个(由于GetFiles()方法按名称升序排序取文件,即删除最早的)
File.Delete(diPathBak + filename);
al1.RemoveAt(0);
count1--;
}
}
}
}
//删除rar文件
int count = 0;
ArrayList al = new ArrayList();
DirectoryInfo diPathRar = new DirectoryInfo(FilePathRar);
foreach (FileInfo fi in diPathRar.GetFiles())
{
if (fi.Name.Length > 12)//每个备份的bak的文件名长度一定会大于12(20100808.bak)
{
if (fi.Name.Substring(0, fi.Name.Length - fi.Extension.Length - 8).Equals(strDbName) && fi.Extension.Equals(".rar"))
{
count++;
al.Add(fi.Name);
if (count > 5)
{
string filename = al[0].ToString();//删除第一个(由于GetFiles()方法按名称升序排序取文件,即删除最早的)
File.Delete(diPathRar + filename);
al.RemoveAt(0);
count--;
}
}
}
}
}