好的，我想我需要澄清一些我之前忘记提及的帖子。我的测试应用程序＆＃34;在Visual Studio 2010中有一个SQL Server 2008 R2 EXPRESS 数据库。但是，数据库是独立的SQL Server Express安装中的 Not 。相反，数据文件，即.mdf和.ldf来自VS＆＃34; Project \ Add New Item \ Data \ Service-based Database＆＃34;中的选择。因此，我的＆＃34; BkUp_SMO.mdf＆＃34;数据文件。
我不确定上述内容是否有所不同，但我尝试了多个使用Microsoft.SqlServer.Management对象SMO的示例，但没有成功。我添加了所需的.DLL，即Microsoft.SqlServer.ConnectionInfo，Microsoft.SqlServer.Management.Sdk.Sfc，Microsoft.SqlServer.Smo，Microsoft.SqlServer.SmoExtended。
在我的代码中，我有＆＃34;使用＆＃34; Microsoft.SqlServer.Management.Common和Microsoft.SqlServer.Management.Smo的语句。 我甚至添加了一个＆＃34;使用＆＃34; for System.Deployment.Application，以便使用String dbPath = ApplicationDeployment.CurrentDeployment.DataDirectory;
将路径的字符串值设置回DB和日志文件所在的ClickOnce部署文件夹。除了下面引用的文章之外，我还尝试了另一篇文章中的示例，即＆＃34;在C＃中备份SQL数据库＆＃34; Backing up an SQL Database in C#
是否无法在Visual Studio创建的SQL数据库上执行备份和还原？
我在C＃中编写了测试应用程序，目的是通过命令行发送SQL Server备份或还原命令。我在一篇标题为“从命令行备份和还原SQL Server数据库”的文章中提供了一些代码
Backup and Restore Your SQL Server Database from the Command Line
完整的应用程序将是user_App，我不希望最终用户必须打开命令窗口并键入任何内容，因此我尝试通过C＃代码发送所需的命令如下所示。我的问题是，代码运行没有异常，CMD窗口打开和关闭，但没有发生我的SQL Server 2008 R2数据文件（.mdf）的任何备份。
请建议我在代码中遗漏的内容，或更好的方法来完成此操作。 此外，完全备份是否会自动备份日志文件（.ldf）？
First code attempt
private void btnChoose_Click(object sender, EventArgs e)
{
if (optBkupCMD.Checked)
{
StringBuilder bkup = new StringBuilder();
bkup.Append("SqlCmd -E -S ");
bkup.Append(Environment.MachineName);//servername appears to be same as computer name.
bkup.Append(" –Q “BACKUP DATABASE [BkUp_SMO.mdf] TO DISK=’C:\\Backups\\BkUp_SMO.bak'”");
string theBackup = bkup.ToString();
using (Process process = new Process())
{
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.CreateNoWindow = false;
process.StartInfo.UseShellExecute = false;
process.StartInfo.Arguments = @"/C";
process.Start();
process.StandardInput.WriteLine(theBackup);
process.StandardInput.Flush();
process.StandardInput.Close();
process.WaitForExit();
Console.WriteLine(process.StandardOutput.ReadToEnd());
}
else if (optRestoreCMD.Checked)
{
StringBuilder rstr = new StringBuilder();
rstr.Append("SqlCmd -E -S ");
rstr.Append(Environment.MachineName);
rstr.Append(" –Q “RESTORE DATABASE [BkUp_SMO.mdf] FROM DISK=’C:\\Backups\\BkUp_SMO.bak'”");
string restore = rstr.ToString();
using (Process process = new Process())
{
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.CreateNoWindow = false;
process.StartInfo.UseShellExecute = false;
process.StartInfo.Arguments = @"/C";
process.Start();
process.StandardInput.WriteLine(restore);
process.StandardInput.Flush();
process.StandardInput.Close();
process.WaitForExit();
Console.WriteLine(process.StandardOutput.ReadToEnd());
}
}
}
My 2nd code attempt.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using Microsoft.Win32;
using System.Deployment.Application;
using System.Diagnostics;
using System.IO;
using Microsoft.SqlServer.Management.Smo;
using Microsoft.SqlServer.Management.Common;
namespace DB_Bkup_using_SMO
{
public partial class Bkup_in_CSharp : Form
{
public Bkup_in_CSharp()
{
InitializeComponent();
}
private void btnBkViaCsharp_Click(object sender, EventArgs e)
{
string filePath = ApplicationDeployment.CurrentDeployment.DataDirectory;
BackupDatabase(filePath);
}
private void btnRestViaCsharp_Click(object sender, EventArgs e)
{
string filePath = ApplicationDeployment.CurrentDeployment.DataDirectory;
RestoreDatabase(filePath);
}
///<summary>
///Backup a whole database to the specified file.
///</summary>
///<remarks>
///The database must not be in use when backing up.
///The folder holding the file must have appropriate permissions given
///</remarks>
///<param name="backupFile">Full path to file to hold the backup</param>
public static void BackupDatabase(string backupFile)
{
try
{
ServerConnection con = new ServerConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BkUp_SMO.mdf;Integrated Security=True;User Instance=True");
Server server = new Server(con);
Backup source = new Backup();
source.Database = "BkUp_SMO.mdf";
source.Action = BackupActionType.Database;
source.LogTruncation = BackupTruncateLogType.Truncate;
BackupDeviceItem destination = new BackupDeviceItem(backupFile, DeviceType.File);
source.Devices.Add(destination);
source.SqlBackup(server);
con.Disconnect();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + " " + ex.InnerException);
}
}
///<summary>
///Restore a whole database from a backup file.
///</summary>
///<remarks>
///The database must be in use when backing up.
///The folder holding the file must have appropriate permissions given.
///</remarks>
///<param name="backupFile">Full path to file to holding the backup</param>
public static void RestoreDatabase(string backupFile)
{
try
{
ServerConnection con = new ServerConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\BkUp_SMO.mdf;Integrated Security=True;User Instance=True");
Server server = new Server(con);
Restore destination = new Restore();
destination.Database = "BkUp_SMO.mdf";
destination.Action = RestoreActionType.Database;
destination.Action = RestoreActionType.Log;
BackupDeviceItem source = new BackupDeviceItem(backupFile, DeviceType.File);
destination.Devices.Add(source);
destination.ReplaceDatabase = true;
destination.SqlRestore(server);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + " " + ex.InnerException);
}
}
}
}
答案 0 :(得分：0)
这是我的备份SQL Server 2008 R2的代码。
如果您尝试搜索，这种基本示例代码很多。
尝试但不需要将此标记为答案，因为这里有很多。
string masterdb_ConnectionString = string.Format(@"Data Source={0};Initial Catalog=Master;Connect Timeout=79;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False;Integrated Security=True;", System.Environment.MachineName);
using (SqlConnection masterdbConn = new SqlConnection())
{
masterdbConn.ConnectionString = mastedb_rConnectionString;
masterdbConn.Open();
using (SqlCommand multiuser_rollback_dbcomm = new SqlCommand())
{
multiuser_rollback_dbcomm.Connection = masterdbConn;
multiuser_rollback_dbcomm.CommandText= @"ALTER DATABASE yourdbname SET MULTI_USER WITH ROLLBACK IMMEDIATE";
multiuser_rollback_dbcomm.CommandTimeout = 79;
multiuser_rollback_dbcomm.ExecuteNonQuery();
}
masterdbConn.Close();
}
SqlConnection.ClearAllPools();
string yourdb_ConnectionString= "connectionstring for yourdb here";
using (SqlConnection backupConn = new SqlConnection())
{
backupConn.ConnectionString = yourdb_ConnectionString;
backupConn.Open();
using (SqlCommand backupcomm = new SqlCommand())
{
backupcomm.Connection = backupConn;
backupcomm.CommandText = string.Format(@"BACKUP DATABASE yourdbname TO DISK='c:\yourdbname.bak'", DateTime.Today.ToString("yyyy/MM/dd"));
backupcomm.CommandTimeout = 79;
backupcomm.ExecuteNonQuery();
}
backupConn.Close();
}
更新 - 是否会在客户端（用户）的计算机上安装SQL Server 2008 R2？
您已经在使用'Integrated Security = True'，这意味着使用此连接字符串的用户将拥有管理员的所有（完整）权限。连接到主数据库显然没有问题。
关于IMMEDIATE ROLLBACK，这将完成所有未完成的事务，就像“在备份之前从数据库中取消”一样。换句话说，在我们关闭一家餐馆之前，如果我们不宣布这家餐厅将要关闭，如果我们突然关闭餐厅，一些顾客可能仍然在餐馆关闭时仍然有食物。
看看ALTER DATABASE IMMEDIATE ROLLBACK, Technet
此示例在第一个ALTER DATABASE语句中使用终止选项WITH ROLLBACK IMMEDIATE。将回滚所有未完成的事务，并立即断开与AdventureWorks2008R2示例数据库的任何其他连接。
最后，看来你正在尝试使用SMO。我经历了几天的困难，但终于失败了，走了另一条道路。