Prevent data insert as part of an ido extension class PreItemInsert event

I'm looking at possibly writing an ido extension class preiteminsert event handler. The purpose is to prevent data unrelated to our application from being written to the table. I'm looking at doing this as opposed to an AES event.

Setting up the event code is straightforward enough. Does anyone know how (or if) I can prevent the data from being inserted as part of this method?

The return on the private method signature is void so I can't return a negative value like in a form script.

Find more posts tagged with

Accepted answers

All comments

kazuyuki-mochizuki

I'm looking at the postupdate and noticed a throw exception... maybe that is similar as returning a negative value in formscript?

I think you can also override the values on preitem insert. like setting a field to blank when its unrelated..

Legacy Contributor

I seem to remember there is a switch on a pre event handler which can disable the standard behaviour.

I think you declare the handler method in the context of the overriding extension class

namespace My.IDO

{

abstract class MyExtensionClassBase : ExtensionClassBase

{

public override void SetContext(IIDOExtensionClassContext context)

{

try

{

base.SetContext(context);

context.IDO.PreItemUpdate += IDO_PreItemInsUpdDel;

context.IDO.PreItemInsert += IDO_PreItemInsUpdDel;

context.IDO.PreItemDelete += IDO_PreItemInsUpdDel;

}

catch (Exception e)

{

/// catch, log in runtime, rethrow

M3Logger.LogMessage(e);

throw;

}

… then SuppressStandardSave save against the update event, this can be conditional and there is plenty fo metadata in the update event object to help make that decision.

/// <summary>

/// Event Handler for PreItemUpdate, PreItemInsert and PreItemDelete

/// </summary>

/// <param name="sender">The IDO</param>

/// <param name="args">IDOEventArgs that includes the IDOUpdateItem</param>

protected void IDO_PreItemInsUpdDel(object sender, IDOItemUpdateEventArgs args)

{

try

{

args.SuppressStandardSave();

you can also retrieve IDO metadata from the context if you wanted a generic extension class that suppressed the standard save if the IDO had no base table (usually this renders it invalid, but I used it in the past to indicate an IDO was a proxy for an API call).

                    Table basetable = null;
                    foreach (var table in Context.IDO.IDOMetadata.Tables.AllTables)
                    {
                        if (table.TableType == TableType.Base)
                            basetable = table;
                    }
                    if (basetable == null)
                        args.SuppressStandardSave();
                    return;

Copyright © 2025 Infor. All rights reserved.