javascript asp教程错误处理


The ASPError Object has zero (0) Methods, nine (9) Properties, zero (0) Events, and zero (0) Collections.

AspCode
AspDescription
Category
Column
Description
File
Line
Number
Source

The way you access the ASPError Properties is with a Server Method. Yeah, I know; it doesn't make sense. Start with something like var myError=Server.GetLastError() and then you can access all nine ASPError Properties following this pattern: <%=myError.Line%>.

Below is the script for Lesson 15.

<%@LANGUAGE="JavaScript"%>
<!-- METADATA TYPE="typelib" 
FILE="C:\Program Files\Common Files\System\ado\msado15.dll" -->
<%
try
	{
	Response.Write("<STRONG>Use <I>GetLastError( )</I><BR></STRONG>\r")
	myError = Server.GetLastError()
	Response.Write("myError.Line: " + myError.Line + "<BR>\r")
	Response.Write("myError.File: " + myError.File + "\r")
	Response.Write("<HR>\r<STRONG>")
	Response.Write("Now an intentional error...")
	Response.Write("<BR></STRONG>\r")
	myError = erver.GetLastError() //this line causes an error
	Response.Write("myError.Line: " + myError.Line + "<BR>\r")
	Response.Write("myError.File: " + myError.File + "<BR>\r")
	}
catch(myDumbError) 
	{ 
	Response.Write("There is an error: " + myDumbError)
	%>
	<BR>
	Graceful error handling goes here (inside the catch statement).
	Make it as simple or sophisticated as you like.<BR>
	<HR>
	<STRONG>Now let's break down the error Object.</STRONG><BR>
	<%
	for ( var i in myDumbError)
		{
		Response.Write(i + ": " + myDumbError[i] + "<BR>\r")
		}
	}
finally
	{
	Response.Write("<HR><STRONG>Let's Finish Up.</STRONG><BR>\r")
	Response.Write("Code inside the <I>finally { }</I> statement ")
	Response.Write("executes regardless of error (or lack thereof). \r")
	Response.Write("<I>finally{ }</I> is totally optional. ")
	Response.Write("It's a good place for things like RS.Close()... ")
	Response.Write("which you'll see later on.")
	}
%>

Click Here to run the script in a new window.

Okay, so what happened to On Error Resume Next? Sorry, that ain't no JavaScript thing. So, what about onerror? That won't work on the server side. But thanks to some core JavaScript we have some error handling.

The section of script for which you wish to provide error handling goes inside the try { } statements and the what-to-do in the event of an error goes inside the catch { } statement. There is also a finally { } statement (optional). The whole thing is just as graceful as On Error (in my opinion).

Not every ASP server allows you access to the ASPError Object. So, don't be surprised if ASPError gives you an error.



相关阅读:
asp实现生成由数字,大写字母,小写字母指定位数的随机数
如何减小数据库的尺寸?
为ASP.NET MVC框架添加AJAX支持
popdiv
ASP教程:表单内容提交到XML文件中
PHP采集相关教程之一 CURL函数库
无密码情况下进入Linux的单用户root模式
海量经典的jQuery插件集合
asp match正则函数使用Matchs实例
Vista系统右键菜单增加用记事本打开功能
oracle函数jdbc介绍:使用in/out参数调用程序
不错的Javascript表格翻页效果
Microsoft Access项目不能压缩的原因
JavaScript教程:网页时间问题
快速导航

Copyright © 2016 phpStudy |