Terminal5250TagHelper class | QSYS API Reference Guide

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Defines the element where the 5250 Terminal will be rendered

Namespace: ASNA.QSys.Expo.Tags Assembly: ASNA.QSys.Expo.Tags.dll

Inheritance: Object –> TagHelper

Remarks

The Terminal5250 Tag Helper renders a 5250 Terminal Emulator.

Legacy Applications migrated to ASNA Monarch Base runtime environment, may contain Display Pages that can directly display screens where the Application Logic still runs as IBM i Program Objects.

There are two reasons why an Application may use this technique:

  1. The Application Migration is a continuos process, where the most used interactive programs are Migrated first. Hybrid environments (application logic code split: some migrated to .Net other remaining on IBM i systems). Sections of the Application are put into production, while the rest is being migrated.

  2. The Application Migration is complete but the IBM i system will not be retired. Some rarely used programs are kept as legacy - indefinitely - on IBM i systems.

    Possible scenarios:

    a) The source code may be missing.

    b) IBM i Program objects too expensive to remediate (programs written on different languages and development resources no longer available).

    c) IBM i Program objects that have not changed for a long time and are not expected to change.

    d) IBM i Program objects Program restricted to system operators - who do not need a new User Interface -.

ASNA Browser Terminal is a product that exposes a Display Page that uses an instance of Terminal5250 Tag Helper, and provides very simple end-user connectivity to the IBM i.

The following markup shows how ASNA Browser Terminal defines the Display Page:

@page
@addTagHelper *, ASNA.QSys.Expo.Tags
@model ASNA.Pages.TerminalPage.Terminal
@{
    ViewData["Title"] = "ASNA BTerm";
}

<html>
<body>
    <div id="close-icon" onclick="asnaExpo.terminal.executeMacro(['Exit', 'REDIRECT:/Monarch/Eoj'])" >
        <svg style="height: 100%" viewBox="0 0 1792 1792" xmlns="http://www.w3.org/2000/svg">
            <path fill="currentColor" d="M1490 1322q0 40-28 68l-136 136q-28 28-68 28t-68-28l-294-294-294 294q-28 28-68 28t-68-28l-136-136q-28-28-28-68t28-68l294-294-294-294q-28-28-28-68t28-68l136-136q28-28 68-28t68 28l294 294 294-294q28-28 68-28t68 28l136 136q28 28 28 68t-28 68l-294 294 294 294q28 28 28 68z" />
        </svg>
    </div>

    <form method="post">
        <Terminal5250 For=@Model />
    </form>
</body>
</html>

In addition to the form element, where the Terminal5250 will render, a clickable icon on the top is displayed to allow the User to close the Application (re-direct to End Of Job Page).

The Model code is very simple:

using Microsoft.AspNetCore.Mvc;
using ASNA.QSys.Expo.Model;

namespace ASNA.Pages.TerminalPage
{
    public class Terminal : Terminal5250_PageModel
    {

    }
}

The Terminal5250_PageModel implements the 5250 protocol to connect to the IBM i.

Properties

Type Name Description
ModelExpression For Gets or sets the Model reference to the Record class. Mostly to simplify markup syntax.
Terminal5250_PageModel The5250RecordModel Gets the Terminal5250_PageModel Model reference