WPF C#开发中利用SQLDMO进行数据库备份还原操作中的注意点
首先下载SQLDMO文件包，下载地址：SQLDMO
下载后，进行解压，然后按照下面的步骤进行操作：
第一步：首先将msvcr71.dll, SQLDMO.DLL, Resources/2052/sqldmo.rll,Resources/1033/sqldmo.rll 拷贝到C:/Program Files/Microsoft SQL Server/80/Tools/Binn目录。
第二步：打开开始，在运行中输入 regsvr32 "C:/Program Files/Microsoft SQL Server/80/Tools/Binn/sqldmo.dll" 注册sqldmo.dll文件。
如果经过以上两次操作后，访问依然提示如下错误：
Retrieving the COM class factory for component with CLSID {10020200-E260-11CF-AE68-00AA004A34D5} failed due to the following error: 80070005.
说明C:/Program Files/文件夹仅有Administrator和System的控制权限，而没有其他任何用户的权限，因此我们为Microsoft SQL Server文件夹增加上Network Service 的读取权限。
即使进行注册后，运行程序中还会报错，类似如下信息：
“event invocation for COM objects requires event to be attributed with DispIdAttribute”
这个原因是在项目Bin中引用SQLDMO.dll文件后，该dll属性中的“嵌入互操作类型”的值默认是True造成的，修改成False即可。
下面附上数据库备份还原操作的主要代码：
----------------------------------数据备份------------------------------------------------
private void btnSave_Click(object sender, RoutedEventArgs e)
{
//备份
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "(*.mdf)|*.mdf";
saveFileDialog.FilterIndex = 0;
if (saveFileDialog.ShowDialog() == true)
{
string filePath = saveFileDialog.FileName;
SQLBACK(Global.DB_SOURCE, Global.DB_UID, Global.DB_UPWD, Global.DB_NAME, filePath);
}
}
#region SQL数据库备份函数
/// < summary>
/// SQL数据库备份
/// < /summary>
/// < param name="ServerIP">SQL服务器IP或(Localhost)< /param>
/// < param name="LoginUserName">数据库登录名< /param>
/// < param name="LoginPass">数据库登录密码< /param>
/// < param name="DBName">数据库名< /param>
/// < param name="BackPath">备份到的路径< /param>
public void SQLBACK(string ServerIP, string LoginUserName, string LoginPass, string DBName, string BackPath)
{
SQLDMO.Backup oBackup = new SQLDMO.Backup();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServer();
oBackup.Action = 0;
oBackup.Initialize = true;
SQLDMO.BackupSink_PercentCompleteEventHandler pceh = new SQLDMO.BackupSink_PercentCompleteEventHandler(Step);
oBackup.PercentComplete += pceh;
try
{
oSQLServer.LoginSecure = false;
oSQLServer.Connect(ServerIP, LoginUserName, LoginPass);
oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
oBackup.Database = DBName;
oBackup.Files = @"" + BackPath + "";
oBackup.BackupSetName = DBName;
oBackup.BackupSetDescription = "数据库备份";
oBackup.Initialize = true;
oBackup.SQLBackup(oSQLServer);
MessageBox.Show("备份成功！");
}
catch (Exception ex)
{
MessageBox.Show("备份失败，原因为：" + ex.Message);
}
finally
{
oSQLServer.DisConnect();
}
}
private void Step(string message, int percent)
{
this.pb.Value = percent;
}
--------------------------------数据还原----------------------------------------------------------
private static DataRestore _Instance = null; //页面实例
public DataRestore()
{
InitializeComponent();
}
public static DataRestore Instance()
{
if (_Instance == null)
{
_Instance = new DataRestore();
}
else
{
MessageBox.Show("已经有一个实例在运行！");
}
return _Instance;
}
/// <summary>
/// 获取数据库服务器列表
/// </summary>
private void GetSQLServerList()
{
SQLDMO._Application sqlApp = new SQLDMO.Application();
SQLDMO.NameList sqlServers = sqlApp.ListAvailableSQLServers();
for (int i = 0; i < sqlServers.Count; i++)
{
object srv = sqlServers.Item(i + 1);
if (srv != null)
{
// this.cboServers.Items.Add(srv);
}
}
//if (this.cboServers.Items.Count > 0)
// this.cboServers.SelectedIndex = 0;
//else
// this.cboServers.Text = "<No available SQL Servers>";
}
private void btnSave_Click(object sender, RoutedEventArgs e)
{
//还原
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "(*.mdf)|*.mdf";
openFileDialog.FilterIndex = 0;
if (openFileDialog.ShowDialog() == true)
{
string filePath = openFileDialog.FileName; //获取选中的备份文件，进行还原操作
SQLDbRestore(Global.DB_SOURCE, Global.DB_UID, Global.DB_UPWD, Global.DB_NAME, filePath);
}
}
#region SQL恢复数据库
/// < summary>
/// SQL恢复数据库
/// < /summary>
/// < param name="ServerIP">SQL服务器IP或(Localhost)< /param>
/// < param name="LoginUserName">数据库登录名< /param>
/// < param name="LoginPass">数据库登录密码< /param>
/// < param name="DBName">要还原的数据库名< /param>
/// < param name="BackPath">数据库备份的路径< /param>
public void SQLDbRestore(string ServerIP, string LoginUserName, string LoginPass, string DBName, string BackPath)
{
SQLDMO.Restore oRestore = new SQLDMO.Restore();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServer();
oRestore.Action = 0;
//SQLDMO.RestoreSink_PercentCompleteEventHandler pceh = new SQLDMO.RestoreSink_PercentCompleteEventHandler(Step);
//oRestore.PercentComplete += pceh;
try
{
oSQLServer.Connect(ServerIP, LoginUserName, LoginPass);
SQLDMO.QueryResults qr = oSQLServer.EnumProcesses(-1);
int iColPIDNum = -1;
int iColDbName = -1;
//杀死其它的连接进程
for (int i = 1; i <= qr.Columns; i++)
{
string strName = qr.get_ColumnName(i);
if (strName.ToUpper().Trim() == "SPID")
{
iColPIDNum = i;
}
else if (strName.ToUpper().Trim() == "DBNAME")
{
iColDbName = i;
}
if (iColPIDNum != -1 && iColDbName != -1)
break;
}
for (int i = 1; i <= qr.Rows; i++)
{
int lPID = qr.GetColumnLong(i, iColPIDNum);
string strDBName = qr.GetColumnString(i, iColDbName);
if (strDBName.ToUpper() == "JCWZDB".ToUpper())
{
oSQLServer.KillProcess(lPID);
}
}
oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
oRestore.Database = DBName;
oRestore.Files = BackPath;
oRestore.FileNumber = 1;
oRestore.ReplaceDatabase = true;
oRestore.SQLRestore(oSQLServer);
MessageBox.Show("数据还原成功！");
}
catch (System.Exception ex)
{
MessageBox.Show("数据还原失败： " + ex.ToString());
}
finally
{
oSQLServer.DisConnect();
}
}
private void Step(string message, int percent)
{
this.pb.Value = percent;
}
#endregion