在Android Xamarin中设置对话框按钮clicklistener

Question

我想在我的Xamarin Android应用程序(C#)中显示一个对话框警报,我想在单击按钮时对对话框进行操作.

从以前开始,我使用这段代码:

AlertDialog.Builder builder = new AlertDialog.Builder(this)
    .SetTitle("Delete")
    .SetMessage("Are you sure you want to delete?)
    .SetPositiveButton("No", (senderAlert, args) => { })
    .SetNegativeButton("Yes", (senderAlert, args) => {
    DatabaseHelper.Delete(item);
});
builder.Create().Show();

为了做一个随机的例子,假设我想保持对话框打开,直到项目被删除,但我想在Android运行时禁用"是"按钮并更改消息文本.这可能来自我必须访问对话框并更改它的代码吗？senderAlert和args都没有任何有用的属性或方法.

我一直在寻找其他方法来构建我的对话框,我已经看到了这两个:

1)这家伙正在使用下面的方式,但我的DialogInterface没有.OnClickListener()

builder.setPositiveButton("Test", 
new DialogInterface.OnClickListener()
{
    @Override
    public void onClick(DialogInterface dialog, int which)
    {
        //Do stuff to dialog
    }
});

2)这家伙正在使用IDialogInterfaceOnClickListener,我一直试图找到一个如何以这种方式做到的例子,但我还没找到.好像他正在使用null而不是我想要的代码.

.setPositiveButton("OK", (Android.Content.IDialogInterfaceOnClickListener)null)

有任何想法吗？

Answer 1

我使用这样的东西:

      using (var builder = new AlertDialog.Builder(Activity))
      {
         var title = "Please edit your details:";
         builder.SetTitle(title);
         builder.SetPositiveButton("OK", OkAction);
         builder.SetNegativeButton("Cancel", CancelAction);
         var myCustomDialog = builder.Create();

         myCustomDialog.Show();
      }

      private void OkAction(object sender, DialogClickEventArgs e)
      {
         var myButton = sender as Button; //this will give you the OK button on the dialog but you're already in here so you don't really need it - just perform the action you want to do directly unless I'm missing something..
         if(myButton != null)
         {
             //do something on ok selected
         }
      }
      private void CancelAction(object sender, DialogClickEventArgs e)
      {
         //do something on cancel selected
      }

例如:https://wordpress.com/read/feeds/35388914/posts/1024259222