mvc项目中实现备份数据库（sqlserver2005）

功能要求：mvc项目，实现数据库备份（bak文件）

实现步骤：<a id="backupDB" href="javascript:" >数据库备份</a>

方法：1、新建类DatabaseMaintenance

/// <summary>
/// 数据库维护
/// </summary>
public class DatabaseMaintenance
{
/// <summary>
/// 备份数据库
/// </summary>
/// <param name="fileName">备份文件的路径</param>
public static void Backup(string fileName)
{
//TODO SQL Server only now
string sqlConnectionString = ConfigurationManager.ConnectionStrings["HelpStoreContext"].ToString();
using (SqlConnection conn = new SqlConnection(sqlConnectionString))
{
string dbName = new SqlConnectionStringBuilder(sqlConnectionString).InitialCatalog;

string commandText = string.Format(
"BACKUP DATABASE [{0}] TO DISK = '{1}' WITH FORMAT",
dbName,
fileName);

DbCommand dbCommand = new SqlCommand(commandText, conn);
if (conn.State != ConnectionState.Open)
conn.Open();
dbCommand.ExecuteNonQuery();
}
}

/// <summary>
/// 还原数据库 database
/// </summary>
/// <param name="fileName">要还原的数据库文件路径</param>
public static void RestoreBackup(string fileName)
{
string sqlConnectionString = ConfigurationManager.AppSettings["HelpStoreContext"];
using (SqlConnection conn = new SqlConnection(sqlConnectionString))
{
string dbName = new SqlConnectionStringBuilder(sqlConnectionString).InitialCatalog;
string commandText = string.Format(
"DECLARE @ErrorMessage NVARCHAR(4000)\n" +
"ALTER DATABASE [{0}] SET SINGLE_USER WITH ROLLBACK IMMEDIATE\n" +
"BEGIN TRY\n" +
"RESTORE DATABASE [{0}] FROM DISK = '{1}' WITH REPLACE\n" +
"END TRY\n" +
"BEGIN CATCH\n" +
"SET @ErrorMessage = ERROR_MESSAGE()\n" +
"END CATCH\n" +
"ALTER DATABASE [{0}] SET MULTI_USER WITH ROLLBACK IMMEDIATE\n" +
"IF (@ErrorMessage is not NULL)\n" +
"BEGIN\n" +
"RAISERROR (@ErrorMessage, 16, 1)\n" +
"END",
dbName,
fileName);

DbCommand dbCommand = new SqlCommand(commandText, conn);
if (conn.State != ConnectionState.Open)
conn.Open();
dbCommand.ExecuteNonQuery();
}

//clear all pools
SqlConnection.ClearAllPools();
}
}

2、在控制器里调用方法

//备份数据库
public string BackupData()
{
try
{
var dname = DateTime.Now.Ticks;
string filename = Server.MapPath("~/Data/" + dname + ".bak");
if (!System.IO.File.Exists(filename))
{
System.IO.File.Create(filename);
}
DatabaseMaintenance.Backup(filename);
return "备份成功";
}
catch
{
return "备份失败";
}
}

3、删除已经备份的数据库bak文件

//删除数据库备份文件
public string DelDataBase(string id)
{
try
{
string filepath=Server.MapPath("~/Data/"+id);
System.IO.File.Delete(filepath);
return "删除成功";
}
catch {
return "删除失败";
}
}