![]() 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) You have to overwrite the template of the treeview itemcontainerstyle, a bit odd from microsoft but you have to write the whole template new. String sql = "SELECT * FROM tbl_report_folders ORDER BY fdr_parent_id ASC" Using (SqlConnection cnn = new SqlConnection(cnn_string)) TreeViewItem item = (TreeViewItem)e.OriginalSource Public void tv_favorites_Expanded(object sender, RoutedEventArgs e) All the other controls which are part of a template are there to create a cretain visual environment, like borders, grids, etc. Private string cnn_string = new cls_server().ConnectionString The selected item in a WPF TreeView has a dark blue background with 'sharp' corners. The ContentPresenter is a Frameworkelement which represents the placeholder for presenting the actual data of a TreeViewItem (and many other controls). 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 Can someone please provide me with some insight on how to accomplish this? 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: The application will not know how many levels there will be, only that there are 2 types of items, folders, and reports. It will give you a knowledge to create simple Tree, customization, Template and Binding. The treeview needs to have multiple levels like the following: In my previous blog (WPF TreeView Example) described how to create a simple WPF TreeView, hierarchical Treeview, customize the default Treeviewand styling the Treeviewto change the appearance. Download examples - 510.05 KB Introduction This article describes the use of TreeView control provided by WPF. TreeView - Selection/Expansion state Next. They represent a database which has a Table, each table can have Fields. Using data binding, the TreeView is very customizable and with the ability to specify multiple templates for rendering different data types, the possibilities are almost endless. BACKGROUND: consider three classes (I have simplified my problem to this). I have researched and watched tutorials but I am still stuck. When I mouse over the main TreeViewItem I get a nice box around it, when I mouse over a subitem I get nothing.I am trying to populate a treeview from a database, but I am not sure the best way to do it. I am having trouble understanding how to Bind Data to a WPF TreeView when custom objects are used. What I have is a treeview populated with Drirectories (done in code behind). *Sorry if there is any typos in the XAML as I am not at a computer with VS or Blend on it at the moment. One thing I did notice in the project is that you must add the Style to each node that has children so, if you were using XAML, you would need to do something like. Let me know if that is what you want and I will post up the example. ![]() The example I have is done with Blend and is pure XAML. when the mouse moves over the TVI, but wasn't sure if you were trying to accomplish this task with XAML or code behind. I have a style that changes the cursor from a hand to an arrow when the TreeViewItem is mousedover (mouseovered? mousedovered (or is that a double positive which would make a negative?)). I played with this a little earlier today, but didn't want to comit to an answer at that time.
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