如何在Monodroid中显示MessageBox

Question

How can I display a message box in Xamarin.Android? How can I get the yes or no response from the message box?

--- Updated :

myBtn.Click += (sender, e) => 
{
   new AlertDialog.Builder(this)
   .SetMessage("hi")
   .Show();
};

Answer 1

You can use the AlertDialog.Buider class from within an Activity .

new AlertDialog.Builder(this)
    .SetPositiveButton("Yes", (sender, args) =>
    {
        // User pressed yes
    })
    .SetNegativeButton("No", (sender, args) =>
    {
        // User pressed no 
    })
    .SetMessage("An error happened!")
    .SetTitle("Error")
    .Show();

Answer 2

Try this:

public void ShowAlert (string str)
        {
            AlertDialog.Builder alert = new AlertDialog.Builder (this);
            alert.SetTitle (str);
            alert.SetPositiveButton ("OK", (senderAlert, args) => {
                // write your own set of instructions
                });

            //run the alert in UI thread to display in the screen
            RunOnUiThread (() => {
                alert.Show ();
            });
        }