【发布时间】：2017-02-20 21:52:06
【问题描述】：
好的，我想我需要澄清一下我之前忘记提及的帖子。我在 Visual Studio 2010 中的“测试应用程序”有一个 SQL Server 2008 R2 EXPRESS 数据库。但是，该数据库不是来自独立 SQL Server Express 安装的。相反，数据文件，即 .mdf 和 .ldf 来自 VS“Project\Add New Item\Data\Service-based Database”中的选择。因此我的“BkUp_SMO.mdf”数据文件。
我不确定以上内容是否有所不同，但我尝试了多个使用 Microsoft.SqlServer.Management 对象 SMO 的示例，但均未成功。我已添加所需的 .DLL，即 Microsoft.SqlServer.ConnectionInfo、Microsoft.SqlServer.Management.Sdk.Sfc、Microsoft.SqlServer.Smo、Microsoft.SqlServer.SmoExtended。
在我的代码中，我对 Microsoft.SqlServer.Management.Common 和 Microsoft.SqlServer.Management.Smo 都有“使用”语句。 我什至为 System.Deployment.Application 添加了一个“使用”，以便使用 String dbPath = ApplicationDeployment.CurrentDeployment.DataDirectory; 为返回 DB 和日志文件所在的 ClickOnce 部署文件夹的路径设置一个字符串值；
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“用 C# 备份 SQL 数据库”Backing up an SQL Database in C#
不能在 Visual Studio 创建的 SQL 数据库上执行备份和还原吗？
我用 C# 编写了一个测试应用程序，目的是通过命令行发送 SQL Server 备份或还原命令。我的一些代码基于一篇标题为：从命令行备份和还原 SQL Server 数据库
的文章Backup and Restore Your SQL Server Database from the Command Line
完整的应用程序将是一个 user_App，我不希望最终用户必须打开命令窗口并输入任何内容，因此我试图通过 C# 代码发送所需的命令，如下所示。我的问题是，代码无异常运行，CMD 窗口打开和关闭，但没有对我的 SQL Server 2008 R2 数据文件 (.mdf) 进行任何备份。
请提出我在我的代码中缺少的内容，或更好的方法来完成此任务。 另外，完整备份是否也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);
}
}
}
}
【问题讨论】：
-
您是否必须“显示”黑色命令行界面？如果没有，有一种常见的更简单的备份方式，就像我的一样。
-
你好凯李。不，我不必查看命令窗口。不过，它必须为最终用户提供一种轻松执行备份恢复的方法。请分享您的方法或代码示例。
标签： c# sql-server-2008 command-line-interface