VFW062 A Tree View with Columns

VFW062 – A Tree View with Columns

• A Tree View with a property of ViewStyle(Unlevelled) may have multiple columns.

• Unlevelled means that that the tree no longer creates a level per field, and instead, creates a column per field.

• The developer is now responsible for the level at which a tree item exists. This is governed by setting the ParentItem property of a tree item to another tree item.

• The tree view will have one set of columns and your logic must initialize and populate these as appropriate for each level in the tree.

• A new tree item's parent must be set to the relevant parent. A null parent means that the item will appear as a root node.

• The parent is no longer governed by the data. It is a choice the developer can now make.

• Effectively, there is NO LIMIT to the number of levels.

Note: The parent of a tree item is completely dynamic. It can be set at any time

Objective

• To understand how a tree view can be defined and managed so that it displays columns as well as a tree view

• Your finished form will look like the following:

To meet these objectives you will complete the following steps:

Step 1. Create Form iiiVFW11 - Tree View with Columns

Step 2. Complete Form iiiVFW11 - Tree View with Columns

Step 3. Add Pop-Up Menu to Show/Hide Columns - Optional

Summary