C# Hyperlink in TextBlock: nothing happens when I click on it
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05-07-2021 - |
Question
In my C# standalone application, I want to let users click on a link that would launch their favorite browser.
System.Windows.Controls.TextBlock text = new TextBlock();
Run run = new Run("Link Text");
Hyperlink link = new Hyperlink(run);
link.NavigateUri = new Uri("http://w3.org");
text.Inlines.Add(link);
The link is displayed correctly.
When I move the mouse over it, the link becomes red.
PROBLEM: When I click it, nothing happens.
Did I forget something? Do I need to implement some kind of method to really let the link be opened?
Solution
You need to handle the hyperlink's RequestNavigate
event. Here's a quick way of doing it:
link.RequestNavigate += (sender, e) =>
{
System.Diagnostics.Process.Start(e.Uri.ToString());
};
OTHER TIPS
Are you handling the 'Hyperlink.RequestNavigate' event? When a user clicks a Hyperlink in a WPF window it doesn't automatically open a browser with the URI specified in its NavigateUri property.
In your code-behind you can do something like:
link.RequestNavigate += LinkOnRequestNavigate;
private void LinkOnRequestNavigate(object sender, RequestNavigateEventArgs e)
{
System.Diagnostics.Process.Start(e.Uri.ToString());
}
You can make a global hyperlink handler in your App.xaml.cs
protected override void OnStartup(StartupEventArgs e) {
EventManager.RegisterClassHandler(
typeof(System.Windows.Documents.Hyperlink),
System.Windows.Documents.Hyperlink.RequestNavigateEvent,
new System.Windows.Navigation.RequestNavigateEventHandler(
(sender, en) => System.Diagnostics.Process.Start(en.Uri.ToString())
)
);
base.OnStartup(e);
}
This assumes all the NavigateUri properties refer to something you want to launch, but you can always make the handler take care of edge cases.