Use Run the mark underlink TextDecorations

       


<Window x:Class="ClassicControls.PopupTest"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="PopupTest" Height="300" Width="300">
    <Grid Margin="10">
      <TextBlock TextWrapping="Wrap">text 
         <Run TextDecorations="Underline" MouseEnter="run_MouseEnter">link</Run>
      </TextBlock>
      <Popup Name="popLink" StaysOpen="False" Placement="Mouse" MaxWidth="200" PopupAnimation="Slide" AllowsTransparency = "True">
        <Border BorderBrush="Beige" BorderThickness="2" Background="White">
          <TextBlock Margin="10"  TextWrapping="Wrap" >
            check out
            <Hyperlink NavigateUri="http://java2s.com" Click="lnk_Click">java2s.com</Hyperlink>
          </TextBlock>
        </Border>
      </Popup>
    </Grid>
</Window>
//File:Window.xaml.vb

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes
Imports System.Diagnostics

Namespace ClassicControls
  Public Partial Class PopupTest
    Inherits System.Windows.Window

    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub run_MouseEnter(sender As Object, e As MouseEventArgs)
      popLink.IsOpen = True
    End Sub
    Private Sub lnk_Click(sender As Object, e As RoutedEventArgs)
      Process.Start(DirectCast(sender, Hyperlink).NavigateUri.ToString())
    End Sub
  End Class
End Namespace

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1.	Simple TextBlock
2.	Simple content
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4.	Semi-Transparent TextBlock
5.	TextBlock.Foreground and ImageBrush
6.	Text decorations: underline
7.	Text decorations: Baseline
8.	Text decorations: Strikethrough
9.	Text decorations: Overline
10.	Text decorations: more than one styles
11.	Multi-span for TextBlock
12.	Setting text decorations
13.	Set pen for TextDecorations
14.	TextTrimming for TextBlock
15.	Apply Blur Effects on UI Element TextBlock
16.	Apply a Glow Effect to Your UI Element TextBlock
17.	Layout TextBlock in UniformGrid
18.	Text as content
19.	Text with mixed content
20.	Whitespace as content and as attribute
21.	Preserving whitespace in mixed content
22.	Nested TextBlock
23.	Enabling hyphenation
24.	Positioning a hosted Button element with BaselineAlignment along with text
25.	Using RenderTransform
26.	This is rotating text
27.	TextBox PreviewKeyDown
28.	TextBox KeyDown
29.	TextBox PreviewKeyUp
30.	TextBox KeyUp
31.	TextBox TextInput
32.	Handling overflow
33.	Simple underline decoration
34.	Effects of the enumerated values of TextWrapping.
35.	Programmatically change the way in which TextBlock is trimmed when it exceeds the outer boundaries of its containing box.

Use Run the mark underlink TextDecorations : TextBlock « Windows Presentation Foundation « VB.Net

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