My Treeview Project Episode 7 | Another Way To Read Through Your Data

In Episode 7 of My Treeview Project we're going to look at another approach to reading through our data and adding nodes to the treeview.

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My Treeview Project | Episode 6: Images for the Nodes

This (at long last) is Episode 6 of My Treeview Project.

• In Episode 1 we started with the "Hello World" treeview
• In Episode 2 we built a treeview that showed some simple data from the Northwind Traders sample data
• In Episode 3 we learned how to change the appearance of the treeview
• In Episode 4 we added Expand All and Collapse All buttons that interact with the treeview
• And in Epsiode 5 we finally got the treeview to do something useful- we used it to select records to view and edit.

Here's this episode's treeview:

Download the finished database

In Episode 6 you'll see two things. The main focus of the episode is the use of images for the nodes in the treeview. As well, I'll demonstrate a different approach to the code that reads records from the tables and creates the nodes.

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My Treeview Project | Episode Five: Using The Treeview To Select Records to View/Edit

In episode 5 we'll make the treeview really do domething. We'll use it to select records from the products and categories tables that we want to see or edit. The work you'll have to do in this episode is a little more than in the last two, but we'll go through it step-by-step. We're building on the work you've done in previous episodes.

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My Treeview Project | Episode Four: Expand All and Collapse All Buttons

In episode 4 we'll take the treeview we designed in episode 3 and add buttons for "collapse all" and "expand all". This will let us get started working with the nodes in a treeview.

In previous episodes I told you to make sure you'd built the treeview from the last episode so we could add to it. This time you can download the completed treeview including this episode.

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My Treeview Project

Treeviews are really powerful interface components. I love building with them. They aren't easy to get started with, though, for a few reasons: they can't be bound to data so you have to fill them using VBA code, they're not part of Access and so aren't covered in the Access help (they're ActiveX controls), and they are often used with complex data, such as hierarchical relationships.

I see lots of questions on the web asking "How do I get started with treeviews- is there a tutorial?". My Treeview Project is just that- a tutorial. Seasoned VBA developers may find it goes a little slow, but be patient! It's aimed at folk for whom the Microsoft online references aren't enough. It goes step-by-step, starting with a simple "Hello World" treeview.

Here's the current table of contents.

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My Treeview Project | Episode Three: Changing How the Treeview Looks

Here's what we'll end up with
after this episode.

In Episode 1: The Hello World! Treeview we built the simplest of treeviews, just to introduce some of the concepts. In Episode 2: Northwind Categories and Products we created a treeview that displayed products in categories based on data from the Northwind sample database.

In this episode we'll take the treeview from epsiode 2 and add some tweaks that affect how it looks. This will let us look at a number of useful techniques and concepts. If you haven't done episode 2 you should go back to it now and build the database because you'll be working from there in this episode.

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My Treeview Project | Episode Two: Northwind Categories and Products

In Episode 1: The Hello World! Treeview we built the simplest of treeviews, just to introduce some of the concepts. In this episode we'll build a treeview to display products in categories.

We'll use data from Microsoft's Northwind Traders sample database. If you don't have a copy you can download it here .

Start by creating a blank form in the Northwind Traders database and add a Treeview control, the same way we did in episode 1.

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My Treeview Project | Episode One: The Hello World! Treeview

The hello world program is a common first exercise when learning to work in a new programming environment: a program that simply displays or prints "Hello World!". In the first episode of this new series on treeviews we'll build the hello world treeview in an Access form.

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