![]() Once the values have been collected from the dialog, the new node is populated with the information and added to the selected node of the TreeView. The tag value can be any object but in this example, the tag is limited to holding an additional string value. ![]() ![]() When a new node is requested, the application opens an instance of the New Node dialog this dialog forces the user to set the name, text, and tag values for the new node. ![]() The form class also contains a context menu this context menu contains two options one to add a new node, and one to delete an existing node. The form class constructor creates a main node in the TreeView control at runtime, the user may select this node (or any child node originating form this node) to add additional nodes to the TreeView. start off by adding a base treeview node The functionality contained in the class is broken up into several regions the class begins with the default imports, namespace declaration, and class declaration: using System The main form class is a standard window form with a few controls added the form contains a split container control on the left-hand side of the control is a TreeView control, on the right-hand side of the splitter are four group boxes the first group box contains a set of labels and text boxes used to display information about a selected node, the remaining group boxes contains labels, text boxes, and buttons used to conduct various searches of the TreeView's node collection based on the node's text, name, or tag values. There is nothing custom or fancy done with any of the TreeView related components in this application it is merely a demonstration of how to work with a TreeView within the context of a Windows Forms application. The other form class (Figure 4) is used to create new nodes within the application, this form is displayed by selecting a node from the TreeView and then selecting the "Add Node" option from the context menu. One is the main form containing the TreeView and a few controls used to display node information (Figures 1, 2, and 3) and to execute searches for a specific node or group of nodes based upon a user-supplied search term. All code supplied in support of this project is contained in two form classes. The application solution contains a single Windows Application project. This may not be required in your scenario though.This is a short article addressing some of the basics of working with a TreeView control the article will address dynamically adding TreeNodes to a TreeView control, searching the nodes to find and highlight a single node or a collection of nodes matching a search term against the TreeNode's tag, text, or name properties, and manually or programmatically selecting nodes.įigure 1: Searching a TreeView Control by the Text Property.įigure 2: Searching a TreeView Control by the Name Property.įigure 3: Searching a TreeView Control by the Name Property.įigure 4: Creating a Node with Specific Properties. Incidentally for TreeViews it is common to use a HierarchicalDataTemplate rather than a plain DataTemplate because this allows for multiple levels of items via the HierarchicalDataTemplate.ItemsSource property. So you should be able to just change your DataTemplate as follows: Integrating the ContextMenu shouldn't be an issue because TextBlock has a ContextMenu property too. Therefore, using a TextBlock instead of a TreeViewItem should cure this. I suspect the use of TreeViewItem rather than TextBlock causes the excessive indenting because you have a (manually created) TreeViewItem in your DataTemplate (which incurs one level of indent) inside another (automatic) TreeViewItem (which incurs another level of indent). That's why the samples you've found use TextBlocks instead of TreeViewItems in the DataTemplate. You would not normally create a DataTemplate containing a TreeViewItem, because the binding infrastructure will be creating the TreeViewItem for you - all your DataTemplate needs to do is specify what should be displayed as the content of the TreeViewItem. The TreeView should have a context menu, which is specific for each object type.īut with this markup the behavior is as intended, but the child items (the rooms) are indented too much.Īnyway all the bining samples I could find use TextBlock instead of TreeViewItem in the DataTemplate, but wonder how to integrate the ContextMenu there. I'm pretty new to Xaml and need some advise.Ī TreeView should be bound to a hierarchical object structure.
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