WPF/C# keyboard event input sendkey

Question

Hi I want to type text in textbox by sendind keys from keyboard.

Xaml:

<Button Name="Start" Margin="20" Grid.Column="0" Grid.Row="0" VerticalAlignment="Top" Click="Start_Click">Start</Button>
<TextBox Name="test" Grid.Column="0" Grid.Row="2"></TextBox>

C#:

private async void Start_Click(object sender, RoutedEventArgs e)
{
 Keyboard.Focus(test);
 await wait(1);
 SendKeys.Send("s"); 
}

But this gives me an error. What I made wrong ?

what error does it give? It usually says what's the problem – Axarydax Mar 31 '13 at 08:29 — Axarydax, Mar 31 '13 at 08:29
InvalidOperationException was unhalted by user code. – Finchsize Mar 31 '13 at 08:31 — Finchsize, Mar 31 '13 at 08:31
and what is the error message of the Exception? – Axarydax Mar 31 '13 at 09:34 — Axarydax, Mar 31 '13 at 09:34

score 3 · Answer 1 · answered Apr 18 '13 at 12:38

I think the problem is you are using "SendKeys" which is Windows Forms technology to interact with WPF components, which is not Windows Forms technology. You need to send events to the TextBox like this:

TextCompositionManager.StartComposition(new TextComposition(InputManager.Current, test, "s"));

WPF/C# keyboard event input sendkey

1 Answers1