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// a demo string
string xml = "<Root><Eles><Ele>abc</Ele><Ele>123</Ele></Eles></Root>";
System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
doc.LoadXml(xml);
System.IO.StringWriter sw = new System.IO.StringWriter();
using (System.Xml.XmlTextWriter writer = new System.Xml.XmlTextWriter(sw))
{
    writer.Indentation = 2;  // the Indentation
    writer.Formatting = System.Xml.Formatting.Indented;
    doc.WriteContentTo(writer);
    writer.Close();
}
// out put the formated xml
Console.WriteLine(sw.ToString());


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using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using MySql ......

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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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C#¶ÁдAccessÊý¾Ý¿âµÄOLE¶ÔÏó×Ö¶Î

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if (File.Exists(txtBrow.Text) != false)   // Îı¾¿òtxtBrowÖÐÄÚÈÝΪÎļþ·¾¶¼°ÎļþÃû
{
     //»ñÈ¡Îļþºó׺
     FileInfo p = new FileInfo(txtBrow.Text.Trim());
     F_str_Type = ......

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          2¡¢ÔÚǰ̨дһ¸öjsº¯Êý£¬ÄÚÈÝΪdocument.getElementById("btn1").click();
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