无法中止还原数据库
本文关键字:还原 数据库 | 更新日期: 2023-09-27 18:25:45
我想为用户提供"取消"按钮-中止正在进行的恢复。为此,在Restore.PercentComplete
事件处理程序中,我检查用户是否单击了Cancel按钮并调用了Restore.Abort()
。但这无济于事:
SMO抛出异常:
服务器"MICHAEL7"的还原失败
执行Transact-SQL语句或批处理时发生异常
堆栈跟踪:位于Microsoft.SqlServer.Management.Smo.Rest.SqlRestore(服务器srv)
DB将永远处于"恢复"模式。以下是相关代码:
using Microsoft.SqlServer.Management.Common;
using Microsoft.SqlServer.Management.Smo;
private volatile bool _CancelRestore = false;
private Restore _RestoreDB;
private Server _myServer;
private Database _currentDatabase;
// user hits Cancel buttton
public void CancelRestore()
{
_CancelRestore = true;
}
// Restore.PercentComplete event handler
private static void CompletionStatusInPercent(object sender, PercentCompleteEventArgs args)
{
if (_CancelRestore)
{
_RestoreDB.Abort();
// Disable the kills to let some time to Abort()
// Stop all processes running on the _currentDatabase database
// _myServer.KillAllProcesses(_currentDatabase.Name);
// Stop the _currentDatabase database
// NOTE: it is a temp name DB: I do not restore over my application DB!
// _myServer.KillDatabase(_currentDatabase.Name);
}
else
{
Console.Clear();
Console.WriteLine("Percent completed: {0}%.", args.Percent);
}
}
备份/还原功能是在本文的帮助下实现的:使用C#和.NET 2.0 的SQL Server 2005数据库备份和还原
谢谢。
我知道这是一个老问题,但我遇到了同样的问题,我找到了一个适合我的解决方案。
代替KillDatabase,我使用以下内容:
sqlRestore.Abort();
sqlRestore.Wait(); //This will wait until the restore operation is canceled
Database db = _server.Database(databaseName);
if (db != null)
db.Drop(); // This will drop the "half" restored Database
应该说,我正在使用SqlRestoreAsync。
KillDatabase()将终止所有连接,因此KillAllProcesses()在这里已过时。
她是我的完整代码:
public async Task<bool> Restore(string backupFile, string databaseName, IProgress<int> progress, CancellationToken ct)
{
Restore sqlRestore = null;
bool result = await Task.Run(() =>
{
try
{
var deviceItem = new BackupDeviceItem(backupFile, DeviceType.File);
sqlRestore = new Restore
{
Action = RestoreActionType.Database,
Database = databaseName,
Partial = false,
ReplaceDatabase = true,
PercentCompleteNotification = 1
};
sqlRestore.PercentComplete += (s, e) => progress.Report(e.Percent);
sqlRestore.Devices.Add(deviceItem);
if (_server.Databases[databaseName] != null)
_server.KillAllProcesses(databaseName);
sqlRestore.SqlRestoreAsync(_server);
while (sqlRestore.AsyncStatus.ExecutionStatus == ExecutionStatus.InProgress)
{
ct.ThrowIfCancellationRequested();
Thread.Sleep(500);
}
if (sqlRestore.AsyncStatus.ExecutionStatus == ExecutionStatus.Succeeded)
{
Database db = _server.Databases[databaseName];
if (db != null)
db.SetOnline();
_server.Refresh();
return true;
}
return false;
}
catch (OperationCanceledException)
{
sqlRestore.Abort();
sqlRestore.Wait();
Database db = _server.Databases[databaseName];
if (db != null)
db.Drop();
return true;
}
catch (ConnectionFailureException)
{
return false;
}
catch (Exception ex)
{
_server.KillDatabase(databaseName);
return false;
}
}, ct);
return result;
}