Menus in WPF

Mahesh Chand
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In WPF, the Menu and the MenuItem classes represent a menu and a menu item respectively. A Menu is a collection of menu items with a command associated with each menu items. A menu item may have children menu items called submenus. This article discusses how to work with menus in WPF applications using XAML and C#.

Creating a Menu as Design Time

The Menu tag in XAML creates a menu control.

The Name property defines the name of the menu and Height and Width represents the height and width of a menu control.

To position a menu control in a Window, the Margin, HorizontalAlignment and VerticalAlignment properties may be used. The following code sets horizontal, vertical alignments, margin, and background color of a menu control.

</Menu>

Setting Menu Control Properties

There are three ways to set a menu control properties. You may use the Properties windows, set properties in XAML manually, or set properties at run-time using WPF code.

If you right click on the menu control and select Properties menu item, you will see the Properties window same as Figure 1.

Figure 1. Properties Window

As you can see from Figure 1, you can set all properties of a Menu control through this Window such as border thickness, opacity, bitmap effects, background and foreground colors, alignments, width and height, layouts, and fonts.

Once you set properties in the Properties window, the respective XAML code is written in the XAML file by the designer. For example, I set BorderThickness to 2, BitmapEffect to DropShadowEffect, and Background to Blue as shown in Figure 2.

Figure 2. Setting a Menu Control Properties

If you look at the XAML file now, you will see Menu code like below where you can see BorderThickness is set to 2, Background is set to Blue, and Menu.BitmapEffect tag is added within the Menu tag.

<Menu.BitmapEffect>

</Menu.BitmapEffect>

</Menu>

Now, the menu looks like Figure 3.

Figure 3. Menu with blue background and drop shadow effect

Adding Menu Items and Sub Menus to a Menu

Now let's add menu items and sub menus to the menu control. The MenuItem tag adds a menu item to the menu control. The following code shows the initial syntax of the MenuItem tag. The Header attribute is the name of the MenuItem.

A MenuItem can have other MenuItem tags within it as child/sub menus and can go up to several levels. The following code adds three children menu items to first menu item.

The output looks like Figure 4.

Figure 4. A menu with menu items

A separate is used to separate categories of menu items. We can add a separator to a menu control by using <Separator /> tag.

We can also add sub menus and sub menu items using the MenuItem tag within parent a MenuItem tag. The following code adds a separator and sub menus and sub menu items to the menu.

</MenuItem>

Now, our new output looks like Figure 5.

Figure 5. A menu with menu items

Adding Tooltips to Menus

The MenuItem.ToolTip tag adds a tooltip to a menu item. The following code adds a tooltip to the Open menu item.

<MenuItem.ToolTip>

Open a file.

</ToolTip>

</MenuItem.ToolTip>

</MenuItem>

The output with the tooltip looks like Figure 6.

Figure 6. A menu with a tooltip

Adding a CheckBox to a Menu Item

By setting IsCheckable property of a MenuItem to true makes a menu item to a CheckBox in front of the header text.

Figure 7

Adding a Keyboard Shortcut to a Menu Item

InputGestureText property is used to add keyboard shortcut to the menu item. The following code adds CTRL+O to a menu item.

You can also add ALT support to a menu item by adding underscore (_) before a character and ALT+character will work. For example, in the previous line of code, _Open menu item can be executed using ALT+O.

Adding an Event Trigger to a MenuItem

The Click event is used to add the menu item click event handler. The following code adds a click event handler for a menu item.

The event handler is defined like following in the code behind. I added a message box when the menu item is clicked.

private void MenuItem_Click(object sender, RoutedEventArgs e)

{

MessageBox.Show("Menu item clicked");

}

Creating a Menu Control at Run-time

The following code creates a menu and adds menu items dynamically.

Menu mainMenu = new Menu();

mainMenu.Background = Brushes.LightGreen;

mainMenu.Height = 300;

mainMenu.Width = 200;

MenuItem item1 = new MenuItem();

item1.Width = 50;

item1.Header = "First";

mainMenu.Items.Add(item1);

MenuItem item2 = new MenuItem();

item2.Width = 50;

item2.Header = "Two";

item1.Items.Add(item2);

MenuItem item3 = new MenuItem();

item3.Width = 50;

item3.Header = "Third";

item1.Items.Add(item3);

Listing 1

Added on 9/27/2011

How to make a Gradient Brackground

How about creating a nice gradient background of menu looks like Figure 8.

Figure 8

All we need is, to set the Background of the Menu item to LinearGradientBrush.

<Menu.Background>
<LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FF3A60AD" Offset="0.528"/>
<GradientStop Color="#FF6A85D8" Offset="0.01"/>
<GradientStop Color="#FF3464C4" Offset="1"/>
<GradientStop Color="#FF202E7E" Offset="1"/>
</LinearGradientBrush>
</Menu.Background>

How to Add multiple menus horizontally

Let's you need to add menu items horizontally, not vertically. All you need to do is, create your Menu width so all items will fit. And you can set layout of the Grid.

See code Listing 2.

</Menu>

</Grid>

Listing 2

Set Menu Item Background to an Image

One of the readers asked this question, how to set the MenuItem background to an Image.

We can do this by setting the Background property of the MenuItem to an ImageBrush. The ImageBrush takes ImageSource as the full path of an image and we can also set the Stretch property to Fill.

<MenuItem.Background>
<ImageBrush ImageSource="Database.png" Stretch="Fill" />
</MenuItem.Background>
</MenuItem>

Summary

In this article, I discussed how we can use Menu and MenuItem controls to create menus in a WPF application. We also saw how we can set menu properties, add menu items at design-time as well as at run-time and add menu item event handlers.

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