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public sealed class DbOper
{
     ///<summary>
     /// DbOperÀàµÄ¹¹Ô캯Êý
     ///</summary>
     private DbOper()
     {
     }
     ///<summary>
     /// Êý¾Ý¿â±¸·Ý
     ///</summary>
     public static void DbBackup()
     {
          SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
          SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
         try
         {
              oSQLServer.LoginSecure = false;
              oSQLServer.Connect("localhost", "sa", "1234");
              oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
              oBackup.Database = "Northwind";
              oBackup.Files = @"d:\Northwind.bak";
              oBackup.BackupSetName = "Northwind";
              oBackup.BackupSetDescription = "Êý¾Ý¿â±¸·Ý";
              oBackup.Initialize = true;
              oBackup.SQLBackup(oSQLServer);
         }
      &nbs


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        public static void CopyFile(string source, string destination)
  & ......

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C#ÐòÁл¯xml
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XmlSerializer xSerializer = new XmlSerializer(typeof(MyObj));
StringWriter sWriter = new StringWriter(CultureInfo.InvariantCulture);
XmlTextWriter xTextWriter = new XmlTextWriter(sWriter);
......

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MSSQL:
declare @begin datetime
declare @End datetime
set @begin=getdate()
   --Ö´ÐеÄÓï¾äдÔÚÕâÀï
set @End=getdate()
select datediff(millisecond,@begin,@End) as Ö´ÐеÄʱ¼ä
--millisecond±íʾºÁÃë Èç¹û¿´Ãë¿ÉÒÔʹÓÃss
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Xml;
namespace WebApplication2
{
    /// <summary>
    /// XMLHelper XMLÎĵµ²Ù×÷¹ÜÀíÆ÷
  &nb ......

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XmlDocument doc = new XmlDocument();
XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "GB2312", null);
doc.AppendChild(dec);
//´´½¨Ò»¸ö¸ù½Úµã£¨Ò»¼¶£©
XmlElement root = doc.CreateElement("First");
doc.AppendChild(root);
//´´½¨½Úµã£ ......
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