Posts Tagged ‘Open Source’

NetDrives 1.0 Released

May 6th, 2009

NetDrivesI’ve just uploaded installer and source code of NetDrives 1.0. This is my first tool that does not only address fellow developers, but a wider audience 🙂

In a few words, NetDrives is an open source utility that helps you manage your network shares and mapped network drives. Unlike Windows, it can reconnect to secured shares during startup and provides you quick access to your configured shares.




More information, screenshots, and downloads at the project page:

Kaxaml source on CodePlex

January 27th, 2008

Robby Ingebretsen published the source code of his incredibly useful (and beautiful!) Kaxaml on CodePlex. I often prefer Kaxaml over Visual Studio because it combines a bunch of really smart features with a very nice UI that just makes it a pleasure to work with. I’m definitely looking forward to have a peek at its internals 🙂

CodePlex project site:
Official Kaxaml download site:

Author: Categories: Open Source, Tools, WPF Tags: , , ,

A versatile WPF TreeView control

January 24th, 2008

A tutorial is now available on Code Project, so check the article for a detailed overview. And please leave your rating if you like the control 🙂

Update: The latest version is currently only available through the download link below. I’ll update the CodeProject article once the current filtering mechanism has been rewritten:

Download: (Current version: 1.0.7, updated 2008.04.06)

TreeView example This is a little something I’ve been working on for a while: A replacement (or better: enhancement) of WPF’s built-in TreeView control.

I became aware of the default control’s limitations during my last project – I naturally started with hierarchical data templates, but was soon confronted with quite a few issues: I missed a simple API to control the tree, and styling of the tree’s nodes proved hard as well. Furthermore, WPF’s TreeView tends to fire all sorts of SelectedItemChanged events if it’s being refreshed or rebound, which caused side-effects with TwoWay data binding.

However, instead of posting a rant that probably nobody would ever read (let alone care about), I worked on an alternative. Here’s the tree’s main features at a glance:

  • Simple declaration:
    <local:ProductTree x:Name="MyTree"
                       Items="{Binding Source={StaticResource Shop},
                       SelectedItem="{Binding ElementName=MyProductList,
                              Path=ActiveItem, Mode=TwoWay}"
                       NodeContextMenu="{StaticResource CategoryMenu}"
                       TreeNodeStyle="{StaticResource SimpleFolders}"
                       TreeStyle="{StaticResource SimpleTreeStyle}"
  • Simple and type safe API:
    //bind flat list of business objects to tree
    List<Product> products = GetProducts();
    myTree.Items = products;
    //select a given item
    Product foo = GetBestSellingProduct();
    myTree.SelectedItem = foo; 
    //SelectedItem is of type Product - no casts required
    Product bar = myTree.SelectedItem;
  • Lazy loading support – does not create tree nodes until the parent node is expanded. Also provides the option to automatically clear invisible tree nodes. This allows either virtualized trees in case getting data is expensive, or low memory trees that keep the number of tree nodes at a minimum.
  • Simple sorting.
  • Convenient context menu handling for tree nodes
  • Optional root node which is not dependent on the tree’s bound items
  • Simple styling on every level: Tree, TreeViewItem, or bound items (via DataTemplates).
  • Tree layout can be cached, saved and reapplied.
  • Access to tree nodes (TreeViewItem) through bound items.
  • AutoCollapse feature / ExpandAll / CollapseAll methods

All this goodness comes at a price: The TreeViewBase class that provides this functionality, is abstract. This means you have to write a little code yourself. However, you’ll probably manage with 3 lines of code, as the base control just needs to know 3 things:

  • How to generate an identifier for a given tree node
  • How to access a bound item’s childs, if there are any
  • How to access a bound item’s parent, if there is one

Here’s the complete implementation of the sample application’s tree control:

//a tree control that handles only ShopCategory objects
public class CategoryTree : TreeViewBase<ShopCategory>

  //the sample uses the category's name as the identifier
  public override string GetItemKey(ShopCategory item)
    return item.CategoryName;

  //returns subcategories that should be available through the tree
  public override ICollection<ShopCategory>
                             GetChildItems(ShopCategory parent)
    return parent.SubCategories;

  //get the parent category, or null if it's a root category
  public override ShopCategory GetParentItem(ShopCategory item)
    return item.ParentCategory;

I’m planning to write a CodeProject article for this one, but for now, it’s only available through my place without a tutorial. However: The library comes with a sample project that shows pretty much all features of the control. Project format is currently VS2008 only, but binaries which target .NET 3.0 are included. Enjoy!

Sample Application