ContextMenu in WPF using VB.NET

In this article we will learn how to use ContextMenu in WPF using VB.NET.
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In this article we will learn how to use ContextMenu in WPF using VB.NET.

ContextMenu

The ContextMenu element enables you to present users with a list of items that specify commands or options that are associated with a particular control. When Users right-click the control to make the menu appear. The event is a right-click on an existing control, element, or item already displayed in the page. A ContextMenu can contain one or more context menu items. Each item is associated with an action to execute client or server-side code. In addition, each context menu item may be displayed with an icon and\or text.

For Example

Taking a TextBox control on the form.

XAML code

<Window x:Class="MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    Title="MainWindow" Height="348" Width="525">

    <TextBox Name="textBox1"

         TextWrapping="Wrap"

         Margin="10, 10, 5, 5" Grid.Row="7" Height="289">

        Rohatash Kumar

        <TextBox.ContextMenu>

            <ContextMenu>

                <MenuItem Header="_Bold"

                IsCheckable="True"

                Checked="Bold_Checked"

                Unchecked="Bold_Unchecked" />

                <MenuItem Header="_Italic"

                IsCheckable="True"

                Checked="Italic_Checked"

                Unchecked="Italic_Unchecked" />

                <Separator />

                <MenuItem Header="I_ncrease Font Size"

                Click="IncreaseFont_Click" />

                <MenuItem Header="_Decrease Font Size"

                Click="DecreaseFont_Click" />

            </ContextMenu>

        </TextBox.ContextMenu>

    </TextBox>

</Window>

 

The form looks like this.


 

con1.gif 

Figure 1.

 

Now double click on the form and add the following code.

 

Private Sub Bold_Checked(ByVal sender As Object, ByVal e As RoutedEventArgs)

        textBox1.FontWeight = FontWeights.Bold

    End Sub

 

    Private Sub Bold_Unchecked(ByVal sender As Object, ByVal e As RoutedEventArgs)

        textBox1.FontWeight = FontWeights.Normal

    End Sub

 

    Private Sub Italic_Checked(ByVal sender As Object, ByVal e As RoutedEventArgs)

        textBox1.FontStyle = FontStyles.Italic

    End Sub

    Private Sub Italic_Unchecked(ByVal sender As Object, ByVal e As RoutedEventArgs)

        textBox1.FontStyle = FontStyles.Normal

    End Sub

    Private Sub IncreaseFont_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)

        If textBox1.FontSize < 18 Then

            textBox1.FontSize += 2

        End If

    End Sub

    Private Sub DecreaseFont_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)

        If textBox1.FontSize > 10 Then

            textBox1.FontSize -= 2

        End If

    End Sub

 

Now run the application and test it.


 

con2.gif 

Figure 2.

 

Now right click on the TextBox control. The form looks like this.


 

con3.gif 

Figure 3.

 

Now applying context-specific Menu bold.


 

con4.gif 

Figure 4.

 

Now applying italic.


 

con5.gif 

Figure 5.

 

Now applying increase font size.


 

con6.gif 

Figure 6.

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