asp.net实现Access数据库备份还原

* * 功能说明:备份和恢复SQL Server数据库 * 当使用SQL Server时,请引用 COM组件中的,SQLDMO.dll组件 * 当使用Access中,请浏览添加引用以下两个dll * 引用C:/Program Files/Common Files/System/ado/msadox.dll,该DLL包含ADOX命名空间 * 引用C:/Program Files/Common Files/System/ado/msjro.dll,该DLL包含JRO命名空间 * *******************************************************************************/ using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.IO; using ADOX;//该命名空间包含创建ACCESS的类(方法)--解决方案 ==> 引用 ==> 添加引用 ==> 游览找到.dll using JRO;//该命名空间包含压缩ACCESS的类(方法) namespace EC { /// <summary> /// 数据库恢复和备份 /// </summary> public class SqlBackObject { public SqlBackObject() { // // TODO: 在此处添加构造函数逻辑 // } #region SQL数据库备份 /// <summary> /// SQL数据库备份 /// </summary> /// <param name="ServerIP">SQL服务器IP或(Localhost)</param> /// <param name="LoginName">数据库登录名</param> /// <param name="LoginPass">数据库登录密码</param> /// <param name="DBName">数据库名</param> /// <param name="BackPath">备份到的路径</param> public static void SQLBACK(string ServerIP,string LoginName,string LoginPass,string DBName,string BackPath) { SQLDMO.Backup oBackup = new SQLDMO.BackupClass(); SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass(); try { oSQLServer.LoginSecure = false; oSQLServer.Connect(ServerIP, LoginName, LoginPass); oBackup.Database = DBName; oBackup.Files = BackPath; oBackup.BackupSetName = DBName; oBackup.BackupSetDescription = "数据库备份"; oBackup.Initialize = true; oBackup.SQLBackup(oSQLServer); } catch (Exception e) { throw new Exception(e.ToString()); } finally { oSQLServer.DisConnect(); } } #endregion #region SQL恢复数据库 /// <summary> /// SQL恢复数据库 /// </summary> /// <param name="ServerIP">SQL服务器IP或(Localhost)</param> /// <param name="LoginName">数据库登录名</param> /// <param name="LoginPass">数据库登录密码</param> /// <param name="DBName">要还原的数据库名</param> /// <param name="BackPath">数据库备份的路径</param> public static void SQLDbRestore(string ServerIP,string LoginName,string LoginPass,string DBName,string BackPath) { SQLDMO.Restore orestore = new SQLDMO.RestoreClass(); SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass(); try { oSQLServer.LoginSecure = false; oSQLServer.Connect(ServerIP, LoginName, LoginPass); orestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database; orestore.Database = DBName; orestore.Files = BackPath; orestore.FileNumber = 1; orestore.ReplaceDatabase = true; orestore.SQLRestore(oSQLServer); } catch (Exception e) { throw new Exception(e.ToString()); } finally { oSQLServer.DisConnect(); } } #endregion #region 根据指定的文件名称创建Access数据库 /// <summary> /// 根据指定的文件名称创建数据 /// </summary> /// <param name="DBPath">绝对路径+文件名称</param> public static void CreateAccess(string DBPath) { if (File.Exists(DBPath))//检查数据库是否已存在 { throw new Exception("目标数据库已存在,无法创建"); } DBPath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath; //创建一个CatalogClass对象实例 ADOX.CatalogClass cat = new ADOX.CatalogClass(); //使用CatalogClass对象的Create方法创建ACCESS数据库 cat.Create(DBPath); } #endregion #region 压缩Access数据库 /// <summary> /// 压缩Access数据库 /// </summary> /// <param name="DBPath">数据库绝对路径</param> public static void CompactAccess(string DBPath) { if (!File.Exists(DBPath)) { throw new Exception("目标数据库不存在,无法压缩"); } //声明临时数据库名称 string temp = DateTime.Now.Year.ToString(); temp += DateTime.Now.Month.ToString(); temp += DateTime.Now.Day.ToString(); temp += DateTime.Now.Hour.ToString(); temp += DateTime.Now.Minute.ToString(); temp += DateTime.Now.Second.ToString() + ".bak"; temp = DBPath.Substring(0, DBPath.LastIndexOf("//") + 1) + temp; //定义临时数据库的连接字符串 string temp2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+temp; //定义目标数据库的连接字符串 string DBPath2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath; //创建一个JetEngineClass对象的实例 JRO.JetEngineClass jt = new JRO.JetEngineClass(); //使用JetEngineClass对象的CompactDatabase方法压缩修复数据库 jt.CompactDatabase(DBPath2, temp2); //拷贝临时数据库到目标数据库(覆盖) File.Copy(temp, DBPath, true); //最后删除临时数据库 File.Delete(temp); } #endregion #region 备份Access数据库 /// <summary> /// 备份Access数据库 /// </summary> /// <param name="srcPath">要备份的数据库绝对路径</param> /// <param name="aimPath">备份到的数据库绝对路径</param> /// <returns></returns> public static void Backup(string srcPath,string aimPath) { if (!File.Exists(srcPath)) { throw new Exception("源数据库不存在,无法备份"); } try { File.Copy(srcPath,aimPath,true); } catch(IOException ixp) { throw new Exception(ixp.ToString()); } } #endregion #region 还原Access数据库 /// <summary> /// 还原Access数据库 /// </summary> /// <param name="bakPath">备份的数据库绝对路径</param> /// <param name="dbPath">要还原的数据库绝对路径</param> public static void RecoverAccess(string bakPath,string dbPath) { if (!File.Exists(bakPath)) { throw new Exception("备份数据库不存在,无法还原"); } try { File.Copy(bakPath, dbPath, true); } catch (IOException ixp) { throw new Exception(ixp.ToString()); } } #endregion } } 下面是我做一个网站后台时在"备份"按扭下写的一个事件: protected void Button1_Click(object sender, EventArgs e) ...{ string newname = "WebJake" + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString()+".bak"; SqlConnection cn = DB.createCon(); string nepath=Server.MapPath("../../DataBack/")+newname; string sql = "BACKUP DATABASE WebJake to DISK ='"+nepath+"'"; SqlCommand cmd = new SqlCommand(sql,cn); try ...{ cn.Open(); cmd.ExecuteNonQuery(); HyperLink1.Text = "已成功备份到服务器路径：" + nepath+" 请点击下载到本地！"; HyperLink1.NavigateUrl = "../../DataBack/"+newname; HyperLink1.Visible = true; } catch (Exception ex) ...{ string exm = ex.Message; Label1.Text = "备份数据库出错，该文件可能不存在！"; Label1.Visible = true; } finally ...{ cmd.Dispose(); cn.Close(); cn.Dispose(); } 当然最关键的还是这句: BACKUP DATABASE WebJake to DISK ='您要保存的路径'