Help Using CollectionBase OnSet and OnSetComplete

graeme gorman

Hi

I have a class that inherits CollectionBase - now what I want is to be able
to validate data when it is updated in the List (I need to make sure that
certain values are not duplicates) so I thought I could override the OnSet
and OnSetComplete functions but they never seem to get called.

Note though that the data is being populated in a PropertyGrid using the
Collection Editor UITypeEditor...

Whats the best way of going about using the OnSet and OnSetComplete
functions...

Thanks
Graeme

Aug 7 '08 #1

Subscribe Post Reply

1246

graeme gorman

Hi

I have worked out that it is the PropertyGrid and CollectionEditor causing
the problem so I'm looking into that now

Thanks
Graeme

"graeme gorman" <graeme[remove_this].go****@gmail.comwrote in message
news:7B**********************************@microsof t.com...

Hi

I have a class that inherits CollectionBase - now what I want is to be
able to validate data when it is updated in the List (I need to make sure
that certain values are not duplicates) so I thought I could override the
OnSet and OnSetComplete functions but they never seem to get called.

Note though that the data is being populated in a PropertyGrid using the
Collection Editor UITypeEditor...

Whats the best way of going about using the OnSet and OnSetComplete
functions...

Thanks
Graeme

Aug 7 '08 #2

by: Steve M | last post by:

I have subclassed CollectionBase. I have also implemented GetEnumerator(). I have tried to set the DataSource of a DataGrid to an instance of my subclass. However, the items in the grid are not...

.NET Framework

CollectionBase.OnSetComplete Method?

by: Shannon Richards | last post by:

Hello All: Can anyone tell what exactly this method is supposed to be used for? I have a class that derives from CollectionBase. This class overrides the OnSetComplete() method to raise an event...

.NET Framework

Why do I need "new" when implementing CollectionBase.RemoveAt()???

by: alanrn | last post by:

I've implemented a number of strongly-typed collections that inherit from CollectionBase and recently noticed something that I don't fully understand. CollectionBase defines method RemoveAt(). ...

.NET Framework

Passthrough connection help

by: hromberg | last post by:

I have a set of passthrough queries that rely on a temporary table in SQL and currently I am dealing with this by creating a passthrough that builds the table and leaves the connection open for an...

Microsoft Access / VBA

Inheriting from CollectionBase and using For..Each

by: Kyle Novak | last post by:

I have a question about strongly typed objects when looping through a collection based on the CollectionBase object and using a For..Each loop. I have 2 objects: -Invoice: Holds all properties...

Visual Basic .NET

CollectionBase.OnSetComplete

by: Shannon Richards | last post by:

Can anyone tell me what the CollectionBase.OnSetComplete() overridable method is supposed to be used for? MyCollectionClass(Index) = Object triggers this method but why does "setting" in a...

Visual Basic .NET

OO Design Best Practice - Please Help

by: Tarun Mistry | last post by:

Hi all, I have posted this in both the c# and asp.net groups as it applies to both (apologies if it breaks some group rules). I am making a web app in asp.net using c#. This is the first fully OO...

C# / C Sharp

Problem with creating classes as runtime - PLEASE HELP

by: julia_beresford | last post by:

Hi I need to create the following class at runtime: public class MyCollection : CollectionBase { public void Add(MyItem item) { List.Add(item); }

C# / C Sharp

using Generics

by: Tony | last post by:

Hello! I just wonder in .NET 2.0 Generics was added. Before generics existed it was an advantage to get strongly typed methods so we derived collection classes from CollectionBase where we had...

C# / C Sharp

React to native button blinking effect

by: lllomh | last post by:

Define the method first this.state = { buttonBackgroundColor: 'green', isBlinking: false, // A new status is added to identify whether the button is blinking or not } autoStart=()=>{

Software Development

Access Europe meeting on Wed 4 Oct - The future of Access

by: isladogs | last post by:

The next Access Europe meeting will be on Wednesday 4 Oct 2023 starting at 18:00 UK time (6PM UTC+1) and finishing at about 19:15 (7.15PM) The start time is equivalent to 19:00 (7PM) in Central...

Microsoft Access / VBA

How to find best mobile app development company in usa

by: Aliciasmith | last post by:

In an age dominated by smartphones, having a mobile app for your business is no longer an option; it's a necessity. Whether you're a startup or an established enterprise, finding the right mobile app...

Mobile Development

Energy Model code modification to account for year dependent interest rate

by: giovanniandrean | last post by:

The energy model is structured as follows and uses excel sheets to give input data: 1-Utility.py contains all the functions needed to calculate the variables and other minor things (mentions...

Python

Send Current Object to PDF

by: NeoPa | last post by:

Hello everyone. I find myself stuck trying to find the VBA way to get Access to create a PDF of the currently-selected (and open) object (Form or Report). I know it can be done by selecting :...

Microsoft Access / VBA

VBA Class Basics

by: NeoPa | last post by:

Introduction For this article I'll be using a very simple database which has Form (clsForm) & Report (clsReport) classes that simply handle making the calling Form invisible until the Form, or all...

Microsoft Access / VBA

Access Europe Meeting - Wed 1 Nov - Using SQL Server skills to extend Access

by: isladogs | last post by:

The next Access Europe meeting will be on Wednesday 1 Nov 2023 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM) Please note that the UK and Europe revert to winter time on...

Microsoft Access / VBA

Access Europe Meeting - Wed 6 Dec - Streamline Your Import/Export Spec Workflow with VBA Classes

by: isladogs | last post by:

The next online meeting of the Access Europe User Group will be on Wednesday 6 Dec 2023 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, Mike...

Microsoft Access / VBA

Applying ComboBox filters Sequentially

by: SueHopson | last post by:

Hi All, I'm trying to create a single code (run off a button that calls the Private Sub) for our parts list report that will allow the user to filter by either/both PartVendor and PartType. On...

Microsoft Access / VBA

Help Using CollectionBase OnSet and OnSetComplete

Similar topics