2020-02-16 标签:undefined,n,ull,引发,两者,区别,联系,貌似,以前,也看,但也,在意,近日,看过去,别人的,一程,源码,到处都,有一些

貌似以前也看过null==undefined，null!==undefined，但也一直没有在意。 近日看过去别人的一程序源码，到处都有一些如if(x!=undefined alert(x) if(x==null){alert('failed') } 其中x为一个未初始化的变量，即undefined

2020-02-16 标签:updatepanel,触发,javascript,脚本,方法,代码,呈现,数据,无法,更改,大家,知道,以前,提到,再看,demo,自定义

一.预呈现数据无法更改 　　1.大家知道,预呈现的数据是无法更改的,以前可能提到过,这里再看demo,自定义一个控件 [DefaultProperty("Text")] [ToolboxData("＜{0}:JsControl runat=server＞＜/{0}:JsControl＞")] pub

2020-02-16 标签:use,jscript,create,a,sql,server,database,实现,代码,如下,db,size,megabytes,set,sqldmo,sqlserver

Create a SQL Server database.实现代码如下：DB_SIZE_IN_MEGABYTES = 5 strDBServerName = "." Set objSQLServer = CreateObject("SQLDMO.SQLServer") objSQLServer.Lo

2020-02-16 标签:use,jscript,list,installed,software,description,returns,a,computer,using,windows,installer,information,written,text,file,script,code,实现,代码

Description Returns a list of software that was installed on a computer using Windows Installer. This information is then written to a text file.Scrip

2020-02-16 标签:use,jscript,list,proxy,server,information,internet,used,a,computer,supported,2003,yeswindows,2000,nowindows,nt

DescriptionReturns information about the Internet proxy server used by a computer. Supported PlatformsWindows Server 2003YesWindows XPYesWindows 2000N