1) When i drag from the grid onto and over the treeview, I can't drop onto the tree
Well, I went through all the time to write a sample app to attach to this forum message, but it won't allow me to attach a zip file. So I tried a support case, but our plan is expired so I can't submit there either.
<UserControl x:Class="FileExplorer.MainPage"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400" >
<UserControl.Resources>
<telerik:HierarchicalDataTemplate x:Key="Category" ItemsSource="{Binding Children}" >
<TextBlock Text="{Binding Name}" >
<telerik:RadContextMenu.ContextMenu>
<telerik:RadContextMenu Opened="RadContextMenu_Opened" ItemClick="RadContextMenu_ItemClick">
<telerik:RadMenuItem x:Name="MenuAddNewChild" Header="Add New Child" />
<telerik:RadMenuItem x:Name="MenuEditCategory" Header="Edit" />
<telerik:RadMenuItem x:Name="MenuDeleteCategory" Header="Delete" />
<telerik:RadMenuItem x:Name="MenuHideCategory" Header="Hide" />
<telerik:RadMenuItem x:Name="MenuShowCategory" Header="Show" />
</telerik:RadContextMenu>
</telerik:RadContextMenu.ContextMenu>
</TextBlock>
</telerik:HierarchicalDataTemplate>
</UserControl.Resources>
<Grid Background="White" Width="Auto" >
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="205" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Grid.Column="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".3*" />
<ColumnDefinition Width=".7*" />
</Grid.ColumnDefinitions>
<Border Grid.Row="0" Grid.Column="0" >
<Grid Background="White" >
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="20" />
</Grid.RowDefinitions>
<telerik:RadTreeView x:Name="CategoryTree" Grid.Row="0" Grid.Column="0" Margin="0,0,12,0"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
IsLineEnabled="True" SelectionMode="Multiple" IsEditable="False"
IsDragDropEnabled="True" IsExpandOnDblClickEnabled="True"
ItemTemplate="{StaticResource Category}"
>
<telerik:RadContextMenu.ContextMenu>
<telerik:RadContextMenu Opened="RadContextMenu_Opened" ItemClick="RadContextMenu_ItemClick">
<telerik:RadMenuItem x:Name="MenuAddNewRootCategory" Header="Add New Root" />
</telerik:RadContextMenu>
</telerik:RadContextMenu.ContextMenu>
</telerik:RadTreeView>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Grid.Row="1" Margin="2,2,20,2">
</StackPanel>
</Grid>
</Border>
<sdk:GridSplitter Grid.Row="0" Grid.Column="0" BorderBrush="Black" BorderThickness="1,0,1,0" Background="LightGray" />
<Border Grid.Row="0" Grid.Column="1" Width="Auto" >
<Grid Background="White" Width="Auto" >
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="20" />
</Grid.RowDefinitions>
<telerik:RadGridView x:Name="ProductList" Grid.Row="0" Width="Auto"
IsReadOnly="True" RowIndicatorVisibility="Visible" AutoGenerateColumns="False" CanUserFreezeColumns="False" ShowGroupPanel="false" IsFilteringAllowed="False" >
<telerik:RadGridView.Columns>
<telerik:GridViewDataColumn UniqueName="SKU" Header="SKU" Width="100" />
<telerik:GridViewDataColumn UniqueName="Name" Header="Name" Width="370" />
</telerik:RadGridView.Columns>
</telerik:RadGridView>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Grid.Row="1" Margin="2,2,10,2">
</StackPanel>
</Grid>
</Border>
</Grid>
<Border Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" HorizontalAlignment="Stretch" BorderBrush="Black" BorderThickness="0,1,0,0" >
<StackPanel HorizontalAlignment="Stretch">
</StackPanel>
</Border>
</Grid>
</UserControl>
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Net;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using Telerik.Windows.Controls;
using Telerik.Windows.Controls.DragDrop;
using Telerik.Windows.Controls.GridView;
using Telerik.Windows.Controls.TreeView;
namespace FileExplorer
{
public partial class MainPage : UserControl
{
private List<Category> _rootCategories = new List<Category>();
public MainPage()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(MainPage_Loaded);
}
void MainPage_Loaded(object sender, RoutedEventArgs e)
{
this.CategoryTree.SelectionChanged += new Telerik.Windows.Controls.SelectionChangedEventHandler(CategoryTree_SelectionChanged);
this.CategoryTree.ItemPrepared += new EventHandler<RadTreeViewItemPreparedEventArgs>(CategoryTree_ItemPrepared);
this.CategoryTree.DragOver += new DragEventHandler(CategoryTree_DragOver);
this.CategoryTree.PreviewDragEnded += new RadTreeViewDragEndedEventHandler(CategoryTree_PreviewDragEnded);
this.CategoryTree.DragEnded += new RadTreeViewDragEndedEventHandler(CategoryTree_DragEnded);
RadDragAndDropManager.AddDropInfoHandler(this.CategoryTree, new EventHandler<DragDropEventArgs>(CategoryTree_OnDropInfo));
RadDragAndDropManager.AddDropQueryHandler(this.CategoryTree, new EventHandler<DragDropQueryEventArgs>(CategoryTree_OnDropQuery));
this.ProductList.RowLoaded += new EventHandler<Telerik.Windows.Controls.GridView.RowLoadedEventArgs>(ProductList_RowLoaded);
Category root1 = new Category("R1", "Folder1");
_rootCategories.Add(root1);
Category sub11 = new Category("S11", "Sub 11");
root1.Children.Add(sub11);
Category sub12 = new Category("S12", "Sub 12");
root1.Children.Add(sub12);
Category root2 = new Category("R2", "Folder2");
_rootCategories.Add(root2);
Category sub21 = new Category("S21", "Sub 21");
root2.Children.Add(sub21);
Category sub22 = new Category("S22", "Sub 22");
root2.Children.Add(sub22);
this.CategoryTree.ItemsSource = _rootCategories;
sub11.Products.Add(new Product("P1", "Product1"));
sub11.Products.Add(new Product("P2", "Product2"));
sub12.Products.Add(new Product("P3", "Product3"));
sub22.Products.Add(new Product("P4", "Product4"));
sub22.Products.Add(new Product("P5", "Product5"));
sub22.Products.Add(new Product("P6", "Product6"));
}
void CategoryTree_ItemPrepared(object sender, RadTreeViewItemPreparedEventArgs e)
{
}
void ProductList_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
{
RadDragAndDropManager.SetAllowDrag(e.Row, true);
RadDragAndDropManager.AddDragQueryHandler(e.Row, ProductList_OnDragQuery);
RadDragAndDropManager.AddDragInfoHandler(e.Row, ProductList_OnDragInfo);
}
void CategoryTree_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e)
{
if (e.AddedItems.Count != 1) return;
//
Category category = (Category) e.AddedItems[0];
//
this.ProductList.ItemsSource = category.Products;
}
private void RadContextMenu_ItemClick(object sender, Telerik.Windows.RadRoutedEventArgs e)
{
RadMenuItem menuItem = e.OriginalSource as RadMenuItem;
RadTreeViewItem treeViewItem = FindParentOfType<RadTreeViewItem>((UIElement)sender);
}
private void RadContextMenu_Opened(object sender, RoutedEventArgs e)
{
RadContextMenu contextMenu = sender as RadContextMenu;
RadTreeViewItem treeViewItem = FindParentOfType<RadTreeViewItem>(contextMenu);
}
private static T FindParentOfType<T>(UIElement element) where T : UIElement
{
if (element == null)
return null;
DependencyObject parent =
Telerik.Windows.RoutedEvent.GetLogicalParent(element) ??
VisualTreeHelper.GetParent(element);
while ((parent != null) && !(parent is T))
{
parent =
Telerik.Windows.RoutedEvent.GetLogicalParent(parent) ??
VisualTreeHelper.GetParent(parent);
}
return (T)parent;
}
void CategoryTree_DragOver(object sender, DragEventArgs e)
{
}
void CategoryTree_PreviewDragEnded(object sender, RadTreeViewDragEndedEventArgs e)
{
}
void CategoryTree_DragEnded(object sender, RadTreeViewDragEndedEventArgs e)
{
}
void CategoryTree_OnDropInfo(object sender, DragDropEventArgs e)
{
}
void CategoryTree_OnDropQuery(object sender, DragDropQueryEventArgs e)
{
e.QueryResult = true;
}
private void ProductList_OnDragQuery(object sender, DragDropQueryEventArgs e)
{
if (e.Options.Source is GridViewRow)
{
e.QueryResult = true;
if (e.Options.Status == DragStatus.DragQuery)
{
e.Options.Payload = ((FrameworkElement)e.Source).DataContext;
}
}
}
private void ProductList_OnDragInfo(object sender, DragDropEventArgs e)
{
if (e.Options.Status == DragStatus.DragInProgress)
{
TreeViewDragCue cue = new TreeViewDragCue();
//cue.ItemsSource = ((StoreProductSearch)((GridViewRow)args.Source).DataContext);
//var cue = RadDragAndDropManager.GenerateVisualCue();
//cue.Content = "Dragging " + ((StoreProductSearch)((GridViewRow)args.Source).DataContext).Name;
e.Options.DragCue = cue;
}
}
}
public class Category
{
public string ID { get; set; }
public string Name { get; set; }
public List<Category> Children { get; set; }
public List<Product> Products { get; set; }
public Category(string id,string name)
{
this.ID = id;
this.Name = name;
this.Children = new List<Category>();
this.Products = new List<Product>();
}
}
public class Product
{
public string SKU { get; set; }
public string Name { get; set; }
public Product(string sku, string name)
{
this.SKU = sku;
this.Name = name;
}
}
}