如何在经典 asp 中创建表单验证？答案

【问题标题】：how to create form validation in classic asp?如何在经典 asp 中创建表单验证？
【发布时间】：2015-02-13 17:54:38
【问题描述】：

我是经典asp的新手。我创建了简单的登录表单，其中仅包含用户名和密码。

这是我的 logon.asp：

<%
Username="Administrator"
Password="Admin"
Validated = "OK"
if Strcomp(Request.Form("User"),Username,1)=0 AND Request.Form("password") = Password then
'Set the validation cookie and redirect the user to the original page.
    Response.Cookies("ValidUser") = Validated
    'Check where the users are coming from within the application.
    If (Request.QueryString("from")<>"") then
    Response.Redirect Request.QueryString("from")
    else
    'If the first page that the user accessed is the Logon page,
        'direct them to the default page.
          Response.Redirect "MyPage.asp"
    End if    
Else
' Only present the failure message if the user typed in something.
    If Request.Form("User") <> "" then
        Response.Write "<h3>Authorization Failed.</h3>" & "<br>" & _
        "Please try again.<br>&#xa0;<br>"
    End if
End if
%>
</head>
<body bgcolor="#FFFFFF">
<FORM ACTION=<%Response.Write "Logon.asp?"&Request.QueryString%> method="post">
<p> 
Username: 
<INPUT TYPE="text" NAME="User" VALUE='' size="20"></INPUT> <br />
Password: 
<INPUT TYPE="password" NAME="password" VALUE='' size="20"></INPUT>
<INPUT TYPE="submit" VALUE="Logon"></INPUT>
</FORM>

这是我的页面.asp：

<%
Validated = "OK"
if Request.Cookies("ValidUser") <> Validated then
'Construct the URL for the current page.
    dim s
    s = "http://"
    s = s & Request.ServerVariables("HTTP_HOST")
    s = s & Request.ServerVariables("URL")
    if Request.QueryString.Count > 0 THEN
    s = s & "?" & Request.QueryString 
    end if
    'Redirect unauthorized users to the logon page.
    Response.Redirect "Logon.asp?from=" &Server.URLEncode(s)
End if
%>
<html>
<head>
<title>My Protected Page</title>
</head>
<body>
<p align="center">This is my secret information<br>
You cannot see it unless you<br>
are properly logged on!</p>

当我在未填写输入字段的情况下输入登录按钮时，它会显示为“需要用户名或密码”。请问，如何创建验证码，以及如何在我现有的代码中添加代码？

任何asp专家都可以指导我，在此先感谢。

【问题讨论】：

标签： validation asp-classic

【解决方案1】：

请在您的 logon.asp 页面中再添加一个条件：

    <%
    Username="Administrator"
    Password="Admin"
    Validated = "OK"
If Trim(Request.Form("User")) <> "" And Trim(Request.Form("password")) <> "" Then
    if Strcomp(Request.Form("User"),Username,1)=0 AND Request.Form("password") = Password then
    'Set the validation cookie and redirect the user to the original page.
        Response.Cookies("ValidUser") = Validated
        'Check where the users are coming from within the application.
        If (Request.QueryString("from")<>"") then
        Response.Redirect Request.QueryString("from")
        else
        'If the first page that the user accessed is the Logon page,
            'direct them to the default page.
              Response.Redirect "MyPage.asp"
        End if    
    Else
    ' Only present the failure message if the user typed in something.
        If Request.Form("User") <> "" then
            Response.Write "<h3>Authorization Failed.</h3>" & "<br>" & _
            "Please try again.<br>&#xa0;<br>"
        End if
    End if
End If
    %>
    </head>
    <body bgcolor="#FFFFFF">
    <FORM ACTION=<%Response.Write "Logon.asp?"&Request.QueryString%> method="post">
    <p> 
    Username: 
    <INPUT TYPE="text" NAME="User" VALUE='' size="20"></INPUT> <br />
    Password: 
    <INPUT TYPE="password" NAME="password" VALUE='' size="20"></INPUT>
    <INPUT TYPE="submit" VALUE="Logon"></INPUT>
    </FORM>

希望这会有所帮助。谢谢。

【讨论】：