Question

I’m trying to pass parameters to a function that is used in a RoutedEventHandler

Button start = new Button();
start.Click += new RoutedEventHandler(playSelectedAlarm_Click);

private void playSelectedAlarm_Click(object sender, EventArgs e)
{
    NavigationService.Navigate(new Uri("/AlarmPicker.xaml", UriKind.Relative));
}

how do I do this? Or is there a better way?

Answer 1

You could add your parameters into the Button’s Tag property. Then, extract them in your event handler:

Button start = new Button();
start.Tag = new string[] { "param1", "param2" };
start.Click += new RoutedEventHandler(playSelectedAlarm_Click);

private void playSelectedAlarm_Click(object sender, EventArgs e)
{        
    //extract the parameters and cast to a `string[]`
    var myParameters = (string[])((Button)sender).Tag;
    string p1 = myParameters[0]; //value is "param1"
    string p2 = myParameters[1]; //value is "param2"


    NavigationService.Navigate(new Uri("/AlarmPicker.xaml", UriKind.Relative));
}

The Tag property expects an object type, so you can input an array of parameters, collection, string etc..