![]() Public void get_children(TreeViewItem parent)ĭataRow rows = dt. SqlDataAdapter adapt = new SqlDataAdapter(sql, cnn) ĭataRow rows = dt.Select("fdr_parent_id = '0'") SqlCommand cmd = new SqlCommand(sql, cnn) String sql = "SELECT * FROM tbl_report_folders ORDER BY fdr_parent_id ASC" Bind HierarchicalDataTemplate as per the data structure. Add TreeView control into the MainWindow and name it as MainTreeView. Bind MainWindowViewModel as DataContext to MainWindow View. Using (SqlConnection cnn = new SqlConnection(cnn_string)) Add Namespace of current application in MainWindow Xaml file. TreeViewItem item = (TreeViewItem)e.OriginalSource Public void tv_favorites_Expanded(object sender, RoutedEventArgs e) ![]() Private string cnn_string = new cls_server().ConnectionString OK, well I have come up with a solution that seems to work, but I'm not sure if there is a better way.Īny suggestions would be welcome! public partial class MainWindow : Window Each node can then have child nodes, and the child nodes can have child nodes and so on. That software technology allows separating the application logic from. CSS3 HTML5 JavaScript jQuery PHP5 The TreeView control: TreeView introduction The TreeView control enabled you to display hierarchical data, with each piece of data represented by a node in the tree. Can someone please provide me with some insight on how to accomplish this? example of representation of the algorithm in the form of Q-determinant. I have done a lot of reading about hierarchal data templates and observable collections but cannot seem to make them fit with my requirements (probably due to my lack of experience). If I stored the data this way, I would need to add each folder to it's parent folder first (based on the ParentID), then add the reports to the correct folder (based on the FolderID).īeing fairly new to WPF and C# in general, I am not sure if this is the best way or if it would even work. I was thinking of having my database table structure as follows: I fill a TreeView (WPF) in the code and want to use some icons in the items. This is where you would include the logic to handle ticking / unticking the. Create a common ViewModel base class to represent each node of the tree, with a collection of the same type to represent the nodes children. The application will not know how many levels there will be, only that there are 2 types of items, folders, and reports. Like many other aspects of WPF development, this becomes much easier if you follow the MVVM pattern. ![]() The treeview needs to have multiple levels like the following: This class has four properties as listed below.Ī, Name: It contains the name of the folder.ī, FullPath: It contains the Full Path of the folder.Ĭ, Files: It contains the list of files present in a directory.ĭ, SubFolders: It returns the subdirectories present in the current directory.ģ.I am trying to populate a treeview from a database, but I am not sure the best way to do it. using System using using System.Linq using System. I code the objects with my limited C knowledge, as below. Please see the picture below for the objects description. Add a class to this project and name it as "Folder". It is a pity in this example only XAML code is provided, for objects there is only description but not code. Create a WPF Application project in C# and name it as "FolderNavigationDemo".Ģ. ![]() In this demo, we do not make use of all features in Dr. However, until they do, this is probably the best way to implement the feature. In this article We are going to see how we can use TreeView control to display the List of Folders and Files present in a particular drive or location on your computer using WPF.ġ. The fact that this is the cleanest way to implement a TreeView of checkboxes in WPF v3.5 indicates, to me, that Microsoft needs to simplify this aspect of the platform.
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