使用 c# 和 SQL Server 备份附加的数据库文件 (.mdf)
本文关键字:数据库 文件 mdf SQL Server 备份 使用 | 更新日期: 2023-09-27 18:27:25
我试图在我的Winforms应用程序中创建数据库的备份。但它不起作用
这是我的代码:
cn.Open();
cmd = new SqlCommand();
cmd.Connection = cn;
cmd.CommandText=@"BACKUP DATABASE Database1.mdf TO DISK = 'C:'db1.bak'";
dr = cmd.ExecuteReader();
dr.close();
cn.Close();
这里cn
SqlConnection
. cmd
SqlCommand
,dr
SqlDataReader
。请给我一个解决方案。
为什么不能使用 SQL 服务器管理对象。
创建如下方法
using Microsoft.SqlServer.Management.Smo;
using Microsoft.SqlServer.Management.Common;
public void BackupDatabase(string databaseName, string userName, string password, string serverName, string destinationPath)
{
//Define a Backup object variable.
Backup sqlBackup = new Backup();
//Specify the type of backup, the description, the name, and the database to be backed up.
sqlBackup.Action = BackupActionType.Database;
sqlBackup.BackupSetDescription = "BackUp of:" + databaseName + "on" + DateTime.Now.ToShortDateString();
sqlBackup.BackupSetName = "FullBackUp";
sqlBackup.Database = databaseName;
//Declare a BackupDeviceItem
BackupDeviceItem deviceItem = new BackupDeviceItem(destinationPath + "FullBackUp.bak", DeviceType.File);
//Define Server connection
ServerConnection connection = new ServerConnection(serverName, userName, password);
//To Avoid TimeOut Exception
Server sqlServer = new Server(connection);
sqlServer.ConnectionContext.StatementTimeout = 60 * 60;
Database db = sqlServer.Databases[databaseName];
sqlBackup.Initialize = true;
sqlBackup.Checksum = true;
sqlBackup.ContinueAfterError = true;
//Add the device to the Backup object.
sqlBackup.Devices.Add(deviceItem);
//Set the Incremental property to False to specify that this is a full database backup.
sqlBackup.Incremental = false;
sqlBackup.ExpirationDate = DateTime.Now.AddDays(3);
//Specify that the log must be truncated after the backup is complete.
sqlBackup.LogTruncation = BackupTruncateLogType.Truncate;
sqlBackup.FormatMedia = false;
//Run SqlBackup to perform the full database backup on the instance of SQL Server.
sqlBackup.SqlBackup(sqlServer);
//Remove the backup device from the Backup object.
sqlBackup.Devices.Remove(deviceItem);
}
用于使用上面显示的那些命名空间。您必须添加这些命名空间的引用。为此——
转到您的应用程序,右键单击"引用"文件夹,然后选择"添加引用"。
现在转到"浏览"选项卡并浏览以下路径-"C:''Program Files''Microsoft SQL Server''100''SDK''Assemblies">
现在选择以下 dll
Microsoft.SqlServer.ConnectionInfo.dll ,Microsoft.SqlServer.Management.Sdk.Sfc.dll ,Microsoft.SqlServer.Smo.dll ,Microsoft.SqlServer.SmoExtended.dll ,Microsoft.SqlServer.SqlEnum.dll ,
注意:Dll的位置可能会根据MS SQL Server的版本而延迟,我不确定。