如何在Monodroid中顯示MessageBox

Question

如何在Xamarin.Android中顯示消息框？我如何從消息框中得到是或否的答覆？

---更新時間：

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

Answer 1

可以使用AlertDialog.Buider類從Activity之內。

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

試試這個：

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(); 
      }); 
     }