The tree provides simple and type-safe access to the underlying data (no properties of type object here).You can tweak the tree for maximum performance, minimum memory footprint, or even a fully virtualized solution that gets data on demand and keeps it cached until you decide to remove it explicitly.Here's the most important features at a glance: Lazy Loading, Caching, and Memory Consumption.Which is why I have to write that darn article now. The result was simple yet effective, so I decided to extend it a little in order to get a generic control which I could reuse and share with the community. This solution took care of my issues (at least the tree-related ones while I could still rely on the basic functionality of TreeView without having to reinvent the wheel. The result was a composite control I built around TreeView. Furthermore, I faced a few other issues when the tree's data source was refreshed or replaced, which caused nasty side effects with TwoWay data binding.īottom line was that the purely data-driven UI didn't quite work in my case - I needed an alternative. While data binding had served me very well so far, I just needed more control from code when it came to that tree. However - I soon reached limits that proved hard to get around. Data was hierarchically organized, and I had to provide a lot of different views on isolated and merged data sources based on a variety of external factors.įirst of all: I 'love' data binding in WPF - it just makes a lot of things so easy! So in order to display nested data on a TreeView control, I started with a hierarchical data template. I was recently working on a WPF project, and it was all about data editing and synchronization. Download source and demo project (VS 2008) - 88.62 KB.Download binaries (.NET 3.0 for VS2005 users) - 96.15 KB.This approach could also be done in the generated item template instead of the item container if you don’t mind (or want) the selection box (the “Bd” border) extending across all of the columns. It works, which is all I will say in its defense. Our needs quickly grew and we added a grid with column labels outside the tree and databound the width of columns there to the widths of these “columns”. ![]() This obviously will not scale well, but if just need a quick and dirty solution, you should be able to do this in blend in a few minutes without adding dependencies for external controls / libraries. If the added border is the same width for all rows, you will have a view that feels like a treeview with columns. ![]()
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