ASP中用select case代替其他语言中的switch case, default用case else
asp中不能用switch语句,要用select case语句了
简单的介绍一下
选择报表的工作一样,如果语句。然而不同的是,他们可以检查多个值。当然,你有
多个相同的,如果.. else语句,但是这并不总是最好的方法。
选择语句允许一个程序来计算表达式,并试图匹配表达式的值案件标签。如果找到匹
配,程序执行相关的声明。对于SELECT语句的语法如下:
select case expression
case label_1
statements_1
case label_2
statements_2
...
case else
statements_n
end select
该计划首先查找与匹配的表达式的值标签的情况,然后条控制转移到该条款,执行相
关的声明。如果没有找到匹配的标签,程序查找任择案Else子句,如果发现,将控制
转移到该条款,执行相关的声明。如果没有Case Else子句发现,程序继续执行的声明
后选择结束。利用休息时间,避免因进入下一个代码自动执行。
让我们考虑一个例子:
<%@ language="vbscript">
<%
Dim Flower
Flower = "rose"
select case flower
case "rose"
response.write(flower & " costs $2.50")
case "daisy"
response.write(flower & " costs $1.25")
case "orchild"
response.write(flower & " costs $1.50")
case else
response.write("There is no such flower in our shop")
end select
%>
例子1、
<%
'/*ASP中用select case代替其他语言中的switch case, default用case else*/
dim today
today = 5
select case today
case 0
str = "星期天"
case 1
str = "星期一"
case 2
str = "星期二"
case 3
str = "星期三"
case 4
str = "星期四"
case 5
str = "星期五"
case 6
str = "星期六"
case 7, 8, 9
str = "today的值是7,8,或9"
case else
str = "未知"
end select
response.write str
response.End()
%>
/*------------输出结果--------
星期五
------------*/
实例2、
board=request("board")
select case board
case "1"
boardName = "技术版"
case "2"
boardName = "信息版"
case "3"
boardName = "客服星空"
case "4"
boardName = "灌水区"
case "5"
boardName = "市场营销"
case "6"
boardName = "经理论坛"
case "7"
boardName = "影音论坛"
case "8"
boardName = "延伸服务"
case "9"
boardName = "东北片区"
case "10"
boardName = "市场动态"
case "11"
boardName = "群发交流"
case "12"
boardName = "hombre"
case "14"
boardName = "论坛"
case "15"
boardName = "在线答疑"
case else
boardName = ""
end select
注意:case "1"后面不能有冒号,boardName = "技术版"后面不能有分号,而且不能出现break语句
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