Getting Started with WPF NotifyIcon

This tutorial will walk you through the creation of a sample application that contains a RadNotifyIcon control.

Assembly References

In order to use RadNotifyIcon, you will need to add references to the following assemblies:

• Telerik.Windows.Controls
• Telerik.Windows.Controls.Navigation

You can find the required assemblies for each control from the suite in the Controls Dependencies help article.

Defining RadNotifyIcon

Example 1 demonstrates how you can define a RadNotifyIcon in xaml. You have to point the RadNotifyIcon to an ".ico" file that will be shown in the taskbar notification area. You can either set the TrayIconSource property which accepts an ImageSource/string pointing to the file, or the TrayIcon property, which accepts a System.Drawing.Icon object.

Example 1: Defining RadNotifyIcon

<telerik:RadNotifyIcon x:Name="icon" TrayIconSource="YourIconPath.ico" GuidItem="00000001-0002-0003-0004-000000000005" /> 

You should replace the placeholder GuidItem with your own Guid. Make sure to create two separate Guids for building in Debug and Release mode and use the same ones for a given application. This will allow Windows to recognize the icon each time you show it in the tray.

Each time you use a new GuidItem, Windows will register a new icon. To learn how to clear the icon cache, you can check out the following thread: How to remove old notification icons from the Windows 10 system tray.

Showing and Hiding the Icon

By default the icon will be displayed in the tray area once the application is started. If you want to manually show the icon, you can initially set its ShowTrayIcon to False. Example 3 shows two options for showing and hiding the icon in code.

Example 2: Hiding the icon by default

<telerik:RadNotifyIcon x:Name="icon" ShowTrayIcon="False" /> 

Example 3: Show/Hide the icon in code

// Options for showing the icon 
this.icon.ShowTrayIcon = true; 
this.icon.AddIcon(); 
 
 
// Options for hiding the icon 
this.icon.ShowTrayIcon = false; 
this.icon.RemoveIcon(); 

' Options for showing the icon 
Me.icon.ShowTrayIcon = True 
Me.icon.AddIcon() 
 
 
' Options for hiding the icon 
Me.icon.ShowTrayIcon = False 
Me.icon.RemoveIcon() 

Refreshing the Icon

The RadNotifyIcon allows for refreshing the icon through the UpdateIcon method.

Example 4: Updating the icon

this.icon.UpdateIcon(); 

Me.icon.UpdateIcon() 

Interacting with the Icon

The RadNotifyIcon supports displaying a popup, tooltip, context menu and balloon notifications. You can learn more about each feature in its respective article:

• Tooltip
• Popup
• ContextMenu
• Balloon Notifications

GetUserNotificationState

The RadNotifyIcon exposes the GetUserNotificationState static method, which allows you to check the state of the computer for the current user to determine whether sending a notification is appropriate.

Example 5: Using the GetUserNotificationState method

var state = RadNotifyIcon.GetUserNotificationState(); 
 
if(state == UserNotificationState.AcceptsNotifications) 
{ 
    // send notification 
} 

Dim state = RadNotifyIcon.GetUserNotificationState() 
 
If state Is UserNotificationState.AcceptsNotifications Then 
    ' send notification 
End If 

Setting a Theme

The controls from our suite support different themes. You can see how to apply a theme different than the default one in the Setting a Theme help article.

Changing the theme using implicit styles will affect all controls that have styles defined in the merged resource dictionaries. This is applicable only for the controls in the scope in which the resources are merged.

To change the theme, you can follow the steps below:

• Choose between the themes and add reference to the corresponding theme assembly (ex: Telerik.Windows.Themes.Windows8.dll). You can see the different themes applied in the Theming examples from our WPF Controls Examples application.

• Merge the ResourceDictionaries with the namespace required for the controls that you are using from the theme assembly. For the RadNotifyIcon, you will need to merge the following resources:

  • Telerik.Windows.Controls
  • Telerik.Windows.Controls.Navigation

Example 6 demonstrates how to merge the ResourceDictionaries so that they are applied globally for the entire application.

Example 6: Merge the ResourceDictionaries

<Application.Resources> 
    <ResourceDictionary> 
        <ResourceDictionary.MergedDictionaries> 
            <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/System.Windows.xaml"/> 
            <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.xaml"/> 
            <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.Navigation.xaml"/> 
        </ResourceDictionary.MergedDictionaries> 
    </ResourceDictionary> 
</Application.Resources> 

Alternatively, you can use the theme of the control via the StyleManager.

Figure 3 shows a RadNotifyIcon with the Windows8 theme applied.

Figure 3: RadNotifyIcon with the Windows8 theme

See Also

• Events