How to – Create dynamic ContextMenu for TreeView in WPF


Hi,

Sharing a simple example wherein we are generating dynamic menuitems for the context menu based on the node or treeviewitem selected in the treeview.

If root Packages is selected –

If Package is selected –

If Batch is selected –

The xml file

<br />
&lt;?xml version="1.0" encoding="utf-8" ?&gt;<br />
&lt;Packages&gt;<br />
 &lt;Package Name="Package 1" Type="Package"&gt;<br />
 &lt;Batch Name="Batch 1" Type="Batch"/&gt;<br />
 &lt;Batch Name="Batch 2" Type="Batch"/&gt;<br />
 &lt;/Package&gt;<br />
 &lt;Package Name="Package 2" Type="Package"&gt;<br />
 &lt;Batch Name="Batch 1" Type="Batch"/&gt;<br />
 &lt;Batch Name="Batch 2" Type="Batch"/&gt;<br />
 &lt;/Package&gt;<br />
&lt;/Packages&gt;<br />

XAML

<br />
&lt;Window x:Class="SampleSyncServerAdminTool.MainWindow"<br />
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"<br />
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"<br />
 Title="MainWindow" Height="350" Width="525"&gt;<br />
 &lt;Window.Resources&gt;<br />
 &lt;!--Binding TreeView--&gt;<br />
 &lt;XmlDataProvider x:Key="MyList" Source="Packages.xml" XPath="Packages"/&gt;</p>
<p>&lt;HierarchicalDataTemplate DataType="Packages" ItemsSource="{Binding XPath=*}"&gt;<br />
 &lt;TextBlock Text="Packages"&gt;&lt;/TextBlock&gt;<br />
 &lt;/HierarchicalDataTemplate&gt;</p>
<p>&lt;HierarchicalDataTemplate DataType="Package" ItemsSource="{Binding XPath=*}"&gt;<br />
 &lt;TextBlock Text="{Binding XPath=@Name}"&gt;&lt;/TextBlock&gt;<br />
 &lt;/HierarchicalDataTemplate&gt;</p>
<p>&lt;HierarchicalDataTemplate DataType="Batch" ItemsSource="{Binding XPath=*}"&gt;<br />
 &lt;TextBlock Text="{Binding XPath=@Name}"&gt;&lt;/TextBlock&gt;<br />
 &lt;/HierarchicalDataTemplate&gt;</p>
<p>&lt;!-- Resources for Right Hand Side detail grid--&gt;</p>
<p>&lt;DataTemplate x:Key="ClosableTabItemTemplate"&gt;<br />
 &lt;DockPanel Width="120"&gt;<br />
 &lt;Button<br />
 Command="{Binding Path=CloseCommand}"<br />
 Content="X"<br />
 Cursor="Hand"<br />
 DockPanel.Dock="Right"<br />
 Focusable="False"<br />
 FontFamily="Courier"<br />
 FontSize="9"<br />
 FontWeight="Bold"<br />
 Margin="0,1,0,0"<br />
 Padding="0"<br />
 VerticalContentAlignment="Bottom"<br />
 Width="16" Height="16"<br />
 /&gt;<br />
 &lt;ContentPresenter<br />
 Content="{Binding Path=DisplayName}"<br />
 VerticalAlignment="Center"<br />
 /&gt;<br />
 &lt;/DockPanel&gt;<br />
 &lt;/DataTemplate&gt;</p>
<p>&lt;DataTemplate x:Key="WorkspacesTemplate"&gt;<br />
 &lt;TabControl<br />
 IsSynchronizedWithCurrentItem="True"<br />
 ItemsSource="{Binding}"<br />
 ItemTemplate="{StaticResource ClosableTabItemTemplate}"<br />
 Margin="4"<br />
 /&gt;<br />
 &lt;/DataTemplate&gt;</p>
<p>&lt;/Window.Resources&gt;<br />
 &lt;Grid&gt;<br />
 &lt;DockPanel&gt;<br />
 &lt;TreeView DockPanel.Dock="Left" Width="150" Name="treeViewPackages"</p>
<p> ItemsSource="{Binding Source={StaticResource MyList}}"&gt;<br />
 &lt;TreeView.Resources&gt;<br />
 &lt;ContextMenu x:Key="TestMenu"&gt;<br />
 &lt;/ContextMenu&gt;<br />
 &lt;/TreeView.Resources&gt;<br />
 &lt;TreeView.ItemContainerStyle&gt;<br />
 &lt;Style TargetType="{x:Type TreeViewItem}"&gt;<br />
 &lt;Setter Property="IsExpanded" Value="True"/&gt;<br />
 &lt;EventSetter Event="PreviewMouseRightButtonDown"<br />
 Handler="OnPreviewMouseRightButtonDown" /&gt;<br />
 &lt;/Style&gt; &lt;/TreeView.ItemContainerStyle&gt;<br />
 &lt;/TreeView&gt;<br />
 &lt;Grid DockPanel.Dock="Right"&gt;<br />
 &lt;HeaderedContentControl<br />
 Content="{Binding Path=Workspaces}"<br />
 ContentTemplate="{StaticResource WorkspacesTemplate}"<br />
 Header="Workspaces"<br />
 /&gt;<br />
 &lt;/Grid&gt;<br />
 &lt;/DockPanel&gt;<br />
 &lt;/Grid&gt;<br />
&lt;/Window&gt;<br />

XAML.cs

<br />
using System;<br />
using System.Collections.Generic;<br />
using System.Linq;<br />
using System.Text;<br />
using System.Windows;<br />
using System.Windows.Controls;<br />
using System.Windows.Data;<br />
using System.Windows.Documents;<br />
using System.Windows.Input;<br />
using System.Windows.Media;<br />
using System.Windows.Media.Imaging;<br />
using System.Windows.Navigation;<br />
using System.Windows.Shapes;<br />
using System.Xml;</p>
<p>namespace SampleSyncServerAdminTool<br />
{<br />
 /// &lt;summary&gt;<br />
 /// Interaction logic for MainWindow.xaml<br />
 /// &lt;/summary&gt;<br />
 public partial class MainWindow : Window<br />
 {<br />
 public MainWindow()<br />
 {<br />
 InitializeComponent();<br />
 }</p>
<p>void OnPreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)<br />
 {</p>
<p>DependencyObject obj = e.OriginalSource as DependencyObject;<br />
 TreeViewItem item = GetDependencyObjectFromVisualTree(obj, typeof(TreeViewItem)) as TreeViewItem;<br />
 XmlElement selectedElement = (XmlElement)item.Header;</p>
<p>string header = selectedElement.Name;<br />
 if (header.ToUpper() == "PACKAGES")<br />
 {<br />
 // Packages root node<br />
 MenuItem mnuItem = new MenuItem();<br />
 mnuItem.Header = "New Package";<br />
 ContextMenu menu = new ContextMenu() { };<br />
 menu.Items.Add(mnuItem);<br />
 (sender as TreeViewItem).ContextMenu = menu;<br />
 }</p>
<p>else<br />
 {<br />
 string attName = selectedElement.Attributes["Name"].Value;<br />
 string type = selectedElement.Attributes["Type"].Value;</p>
<p>string fullNodeInfo = "Header: " + header + " Attribute Name: " + attName + " Type: " + type;</p>
<p>if (type.ToUpper() == "PACKAGE")<br />
 {<br />
 MenuItem mnuItem1 = new MenuItem();<br />
 mnuItem1.Header = "New Package";<br />
 MenuItem mnuItem2 = new MenuItem();<br />
 mnuItem2.Header = "Show Package Details";<br />
 MenuItem mnuItem3 = new MenuItem();<br />
 mnuItem3.Header = "Edit Package";<br />
 MenuItem mnuItem4 = new MenuItem();<br />
 mnuItem4.Header = "Delete Package";<br />
 MenuItem mnuItem5 = new MenuItem();<br />
 mnuItem5.Header = "Add to Queue";</p>
<p>ContextMenu menu = new ContextMenu() { };<br />
 menu.Items.Add(mnuItem1);<br />
 menu.Items.Add(mnuItem2);<br />
 menu.Items.Add(mnuItem3);<br />
 menu.Items.Add(mnuItem4);<br />
 menu.Items.Add(mnuItem5);</p>
<p>(sender as TreeViewItem).ContextMenu = menu;<br />
 }<br />
 else if (type.ToUpper() == "BATCH")<br />
 {<br />
 MenuItem mnuItem1 = new MenuItem();<br />
 mnuItem1.Header = "Show Batch Details";<br />
 MenuItem mnuItem2 = new MenuItem();<br />
 mnuItem2.Header = "Edit Batch";<br />
 MenuItem mnuItem3 = new MenuItem();<br />
 mnuItem3.Header = "Delete Batch";</p>
<p>ContextMenu menu = new ContextMenu() { };<br />
 menu.Items.Add(mnuItem1);<br />
 menu.Items.Add(mnuItem2);<br />
 menu.Items.Add(mnuItem3);</p>
<p>(sender as TreeViewItem).ContextMenu = menu;<br />
 }<br />
 }<br />
 }</p>
<p>private static DependencyObject GetDependencyObjectFromVisualTree(DependencyObject startObject, Type type)<br />
 {<br />
 var parent = startObject;<br />
 while (parent != null)<br />
 {<br />
 if (type.IsInstanceOfType(parent))<br />
 break;<br />
 parent = VisualTreeHelper.GetParent(parent);<br />
 }<br />
 return parent;<br />
 }<br />
 }<br />
}<br />

Bye.

Advertisements

Author: Nishant Rana

I love working in and sharing everything about Microsoft.NET technology !

4 thoughts on “How to – Create dynamic ContextMenu for TreeView in WPF”

  1. Hi, can you upload or send me the project? I trying to load the Packages.xml with his Packages, Package and Batch classes but its not worked. I will appreciate it.

    Thank you!

    Like

  2. “(sender as TreeViewItem).ContextMenu = menu;” can throw a null reference exception. Use “item.ContextMenu=menu;” instead. You should also check to see if item is null and if so, return before attempting to do anything further,

    Like

  3. This is a good example, except that it doesn’t show how to handle the command binding of a dynamically generated ContextMenu for a TreeViewItem.

    Like

Please share your thoughts

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Power Melange

Power Melange By Shalinee

Clavin's Blog

Power Automate - Power Apps - SharePoint Online - Azure - Nintex - K2 - Artificial Intelligence

Sat Sangha Salon

An Inquiry in Being

The Indoencers

The Influencers & Influences of Indian Music

Monika Halan's blog

Hand's-free money management

D365 Demystified

A closer look at Microsoft Dynamics 365.

Microsoft Mate (msftmate) - Andrew Rogers

Experienced consultant primarily focused on Microsoft Dynamics 365 and the Power Platform

Knowhere365

Specific topics by Django Lohn on the whole Microsoft365 Stack

Manmit Rahevar's Blog

One Stop Destination for Microsoft Technology Solutions

MG

Naturally Curious

Brian Illand

Power Platform and Dynamics 365

Steve Mordue MVP

A Microsoft Business Applications MVP

Subwoofer 101

Bass defines your home theater

SQLTwins by Nakul Vachhrajani

SQL Server tips and experiences dedicated to my twin daughters.

Everything D365

Discovering Azure DevOps and D365 Business Applications

Tech Wizard

Lets do IT Spells

Two Bite Tips

Valuable Tips To Grow Your Business

XRM Tricks (Power Platform & Dynamics CRM )

Power Platform & Dynamics CRM

CRM TIPS BY PRM

Mail to crmtipsbyprm@gmail.com for queries and suggestions

nijos.dev

Giving back to the community what I have learned

xrm CRM Dynamics

Dynamics CRM Technical & Functional Info

Dynamics 365 Blogs - Explained in unique way

Sometimes you need to look at things from different perspective.

CRM Keeper

Dynamics 365 Customer Engagement, CRM, Microsoft CRM, Dynamics CRM

EVOLVED365

Step into the world of a Dynamics 365 Consultant

Dianamics PCF Lady

Diana & Dynamics 365 & Power Platform

Sara Lagerquist

No Code Customization Concepts

innovativeaj

developer, designer, writer, fun loving, patriotic, humble and a sweet person inside out :) love and respect people who have a great sense of humor.

Temmy Wahyu Raharjo

Dreaming to be a clean coder and TDD minded programmer.

Transform 365

We blog about problems we face and code we write to help others

Virendra Agrawal's Blog

Blogs, News and Insights of Dynamics 365 world

Jukka Niiranen

Thinking forward about Microsoft Power Platform

Amar Singh

Share your knowledge. It’s a way to achieve immortality.

%d bloggers like this: