WPF - Tooltip

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A tooltip is a control that creates a pop-up window that displays information for an element in the GUI. The hierarchical inheritance of ToolTip class is as follows −

Commonly Used Properties of ToolTip Class

Given below are the most commonly used properties of ToolTip.

Sr. No.	Property & Description
1	IsOpen Gets or sets a value that indicates whether the ToolTip is visible.
2	IsOpenProperty Identifies the IsOpen dependency property.
3	Placement Gets or sets how a ToolTip is positioned in relation to the placement target element.
4	PlacementProperty Identifies the Placement dependency property.
5	PlacementTarget Gets or sets the visual element or control that the tool tip should be positioned in relation to when opened by the ToolTipService.
6	PlacementTargetProperty Identifies the PlacementTarget dependency property.
7	TemplateSettings Gets an object that provides calculated values that can be referenced as TemplateBinding sources when defining templates for a ToolTip.

Commonly Used Events of ToolTip Class

Given below are the most commonly used events of ToolTip.

Sr. No.	Events & Description
1	Closed Occurs when a ToolTip is closed and is no longer visible.
2	Opened Occurs when a ToolTip becomes visible.

Example

• Let’s create a new WPF project with the name WPFToolTipControl.

• Drag two text blocks, two text boxes, and one button from the Toolbox.

• The following example shows how to use a ToolTip in a WPF application.

• The following XAML code creates a ToolTip with some properties to display ToolTips on Button and Text boxes.

<Window x:Class = "WPFToolTipControl.MainWindow" 
   xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
   xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml" 
   xmlns:d = "http://schemas.microsoft.com/expression/blend/2008" 
   xmlns:mc = "http://schemas.openxmlformats.org/markup-compatibility/2006" 
   xmlns:local = "clr-namespace:WPFToolTipControl" 
   mc:Ignorable = "d" Title = "MainWindow" Height = "350" Width = "604"> 
	
   <Grid> 
      <TextBlock x:Name = "textBlock" HorizontalAlignment = "Left"  
         Margin = "101,75,0,0" TextWrapping = "Wrap"  
         Text = "User Name" VerticalAlignment = "Top" /> 
			
      <TextBlock x:Name = "textBlock1" HorizontalAlignment = "Left"  
         Margin = "101,125,0,0" TextWrapping = "Wrap"  
         Text = "Password" VerticalAlignment = "Top" /> 
			
      <TextBox x:Name = "textBox" HorizontalAlignment = "Left"  
         Height = "24" Margin = "199,75,0,0" TextWrapping = "Wrap"  
         VerticalAlignment = "Top" Width = "219"  
         ToolTipService.ToolTip  =  "Enter User Name" />
			
      <PasswordBox x:Name = "passwordBox" HorizontalAlignment = "Left"  
         Margin = "199,125,0,0" VerticalAlignment = "Top" Width = "219"  
         Height = "24" ToolTipService.ToolTip  =  "Enter Password" /> 
			
      <Button x:Name = "button" Content = "Log in" HorizontalAlignment = "Left"  
         Margin = "199,189,0,0" VerticalAlignment = "Top" Width = "75"  
         ToolTipService.ToolTip = "Log in" /> 
			
   </Grid> 
	
</Window> 

When you compile and execute the above code, it will produce the following output. When the mouse enters the region of the Button or the Text boxes, it will show a tool tip.

We recommend that you execute the above example code and try the other properties and events of ToolTip class.