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ASP Conditionals

Express a small capacity decision clearly.

How it works

If, ElseIf and Else select one branch. Select Case is useful for several distinct choices. Put validation before the branch that changes state. A readable refusal path helps a reviewer see that unavailable seats are handled intentionally rather than falling through to success.

Use the separate Windows lab

This is a legacy-maintenance course. Classic ASP uses IIS and VBScript; ASP.NET Web Pages uses .NET Framework and Razor. Neither runs in PHP, Apache or Bhylu’s browser playground. The reviewed baseline is 32-bit IIS Express 10.0.2001, .NET Framework 4.8, Web Pages / Razor 3.2.9 and the Windows VBScript engine. ADO database examples use the actual 32-bit Jet OLE DB 4.0 provider, not SQL Server or XAMPP MySQL.

Download download-lab.mjs into a separate empty learning folder. Run node download-lab.mjs to fetch hash-checked source files into a new bhylu-asp-lab folder, then cd bhylu-asp-lab and node run-lab.mjs --start. Before deployment, local preview uses node download-lab.mjs http://127.0.0.1:8000/examples/asp/. The source downloader refuses an existing destination. Review its source before running it.

The foreground launcher needs your own 32-bit IIS Express installation with Classic ASP, .NET Framework 4.8 and the VBScript engine available. It downloads the three pinned Web Pages packages from NuGet into its private cache, binds only localhost on port 8142 and stops when you press Ctrl+C. Keep its console open. Visit http://localhost:8142/conditionals.asp. It does not install IIS, enable Windows features, change Apache/PHP/MySQL, or publish any files. See the bundled README.txt for manual setup and test boundaries.

Each complete Classic ASP source requires the supplied Global.asa acknowledgement; Web Pages uses _PageStart.cshtml. Database and file examples create owned temporary files only under this private lab’s blocked App_Data folder. Sources are public text downloads; do not upload them as executable teaching endpoints on Bhylu.

Download conditionals.asp

Example

conditionals.asp

<%@ Language="VBScript" CodePage="65001" %>
<% Option Explicit
Response.Buffer = True
Response.ContentType = "text/plain"
Response.Charset = "utf-8"
If Application("BhyluLab") <> "YES" Then
    Response.Status = "403 Forbidden"
    Response.Write "Use the separate Bhylu learning lab."
    Response.End
End If
Dim available, requested
available = 2
requested = 3
If requested < 1 Then
    Response.Write "Invalid quantity"
ElseIf requested > available Then
    Response.Write "Not enough seats"
Else
    Response.Write "Can reserve"
End If
%>
Focus on the lesson operations

This excerpt omits shared lab setup. Use the complete download and supporting files to run it.

Lesson excerpt

Dim available, requested
available = 2
requested = 3
If requested < 1 Then
    Response.Write "Invalid quantity"
ElseIf requested > available Then
    Response.Write "Not enough seats"
Else
    Response.Write "Can reserve"
End If

Expected result

Not enough seats

The first branch rejects a bad quantity. The second compares a valid positive request with capacity. The final branch is reached only when both conditions permit it. Later database lessons repeat the capacity condition inside the actual UPDATE.

Primary references

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