Question

ASP 怎么判断文本框传递来的值是否为空

2个文本框名字叫 lmls 和 zlm 当这2个为空值是 提示不能为空 麻烦把正确的写法加到下面的代码中 写出来 多谢了<!--#include file="conn.asp"-->
<% CODEPAGE="65001"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<%
set rs1=server.CreateObject("adodb.recordset")
sql1="select * from LM_Info"
rs1.open sql1,conn,1,3
rs1.addnew
rs1("LM_Name")=request.form("lmls")
rs1("LM_LS")=request.form("zlm")
rs1.update
rs1.close
response.Write "<br/><br/><br/><p align='center'>添加成功，请进行其他操作</p>"
%>
<%
conn.close
set rs1=nothing
set conn=nothing
%>

Answer 1

这样写： <!--#include file="conn.asp"-->
<% CODEPAGE="65001"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<%
'###############################################
IF Request.form("lmls")="" or Request.form("zlm")="" then
response.write"<SCRIPT language=JavaScript>alert('不能为空');"
response.write"javascript:history.go(-1)</SCRIPT>"
End IF
'##############################################set rs1=server.CreateObject("adodb.recordset")
sql1="select * from LM_Info"
rs1.open sql1,conn,1,3
rs1.addnew
rs1("LM_Name")=request.form("lmls")
rs1("LM_LS")=request.form("zlm")
rs1.update
rs1.close
response.Write "<br/><br/><br/><p align='center'>添加成功，请进行其他操作</p>"
%>
<%
conn.close
set rs1=nothing
set conn=nothing
%>

Answer 2

建议你在这两个文本框的页面加一个用javascript写的判断空值，就是那种直接弹出来提醒的。。。”XXX不能为空！“

Answer 3

if trim(request.form("lmls")) = "" then
btns = msgbox("不能为空")
exit
end if
if trim(request.form("zlm")) = "" then
btns = msgbox("不能为空")
exit
end if

Answer 4

javascriptfunction iifspc()
{
var gettxt=document.getElementById("lmls").value;if (gettxt=="" )
alert ("空");

}asp if trim(request.form("lmls")) = "" then
msgbox(" 空")
end if

Answer 5

用js不行吗？