缓存，随机，时间，消除空格

1.htm 

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<script   language= "JavaScript "   id= "_0009 "   src= "1.js?id=45 "> </script> 

1.js 

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var   me   =   document.getElementById( "_0009 "); 

if(me   !=   null)   document.writeln(me.src.replace(/^[^?]+(?:\?id=(\d+)|.*)$/,   "$1 ")); 

IF   DATALENGTH(@body)   >   0

判断为空 

if   body   is   null

可以的.   修改web.config,修改bin目录都会导致应用程序重启

DateTime   dt   =   DateTime.Parse( "2007-8-9   17:16:00 "); 

string   str   =   dt.ToUniversalTime().ToString( "r ");   //   Thu,   09   Aug   2007   09:16:00   GMT 

static   int   j   =   0; 

private   void   Page_Load(object   sender,   System.EventArgs   e) 

{ 

Response.Write(GetRandString(16,   "0123456789 ")); 

Response.Write( " <br/> "); 

Response.Write(GetRandString(16,   "0123456789 ")); 

} 

//   获取随机串 

private   string   GetRandString(int   count,   string   str) 

{ 

string   randString   =   " "; 

Random   rand   =   new   Random(   DateTime.Now.Millisecond   j++); 

for   (int   i   =   0;   i   <   count;   i++) 

{ 

int   t   =   rand.Next(str.Length); 

randString   +=   str[t]; 

} 

return   randString; 

}

静态页面缓存<meta http-equiv="pragma" content="no-cache">

 DateTime a = DateTime.Now.AddDays(-1);

        DateTime b = a.Subtract(DateTime.Now);

是asp.net的postback特性，通常刷新的时候会问你“是不是要重新提交表单”之类的话 一个解决方法是，添加功能执行后，用Response.Redirect重定向到当前页面，这样就不会有刷新问题了 

正则做一下吧 input = Regex.Replace(input, @"(\r\n){2,}", "\r\n", RegexOptions.Multiline); input = Regex.Replace(input, @"\n{2,}}", "\n", RegexOptions.Multiline); input = Regex.Replace(input, @" {2,}", " ", RegexOptions.Multiline);