Question

I was trying to use the event keyDown event in a wpf textbox control and capture clicked keys with e.Key, however since the at “@” character doesn’t have a key, I can’t catch it. How do I detect the “@” key clicked

private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
{
    if(e.Key == Key.) // nothing corresponding the at key 
}

Answer 1

KeyDown is for actual keys, it does not concern itself with their interpretation. Use PreviewTextInput instead for example.

private void RichTextBox_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
    if (e.Text == "@")
    {
        //...
    }
}