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)
" +  
                    "ALTER DATABASE [{0}] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
" +  
                    "BEGIN TRY
" +  
                        "RESTORE DATABASE [{0}] FROM DISK = '{1}' WITH REPLACE
" +  
                    "END TRY
" +  
                    "BEGIN CATCH
" +  
                        "SET @ErrorMessage = ERROR_MESSAGE()
" +  
                    "END CATCH
" +  
                    "ALTER DATABASE [{0}] SET MULTI_USER WITH ROLLBACK IMMEDIATE
" +  
                    "IF (@ErrorMessage is not NULL)
" +  
                    "BEGIN
" +  
                        "RAISERROR (@ErrorMessage, 16, 1)
" +  
                    "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";  
           }  
       }