相关疑难解决方法(0)

我是Xamarin的新手,我不知道如何在c#中执行以下操作.我想在单击Positive/Negative按钮时阻止alertdialog关闭.我需要先对输入进行一些验证.如果输入正确,则对话框可以关闭,否则我将显示带有说明的消息.基本上,我有以下代码:

private void CreateAddProjectDialog() { 
    //some code
    var alert = new AlertDialog.Builder (this);
    alert.SetTitle ("Create new project");
    alert.SetView (layoutProperties);
    alert.SetCancelable (false);
    alert.SetPositiveButton("Create", HandlePositiveButtonClick);
    alert.SetNegativeButton("Cancel", HandelNegativeButtonClick);
}

private void HandlePositiveButtonClick (object sender, EventArgs e) {
    //Do some validation here and return false (prevent closing of dialog) if invalid, else close....
}

现在,我在StackOverflow上重新发布以下文章:如何在单击按钮时阻止对话框关闭

我认为下面的代码(取自线程)有解决方案,但我不知道如何重写我的c#代码来实现Java:

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("Test for preventing dialog close");
builder.setPositiveButton("Test", 
    new DialogInterface.OnClickListener()
    {
        @Override
        public void onClick(DialogInterface dialog, int which)
        {
            //Do nothing here because we …

我正在尝试使用C#在Android应用程序上创建警报对话框.不幸的是我收到此错误:

The call is ambiguous between the following methods or properties: `Android.App.AlertDialog.Builder.SetPositiveButton(string, System.EventHandler<Android.Content.DialogClickEventArgs>)' and `Android.App.AlertDialog.Builder.SetPositiveButton(string, Android.Content.IDialogInterfaceOnClickListener)' (CS0121) (App)

这是我的代码:

var alert = new AlertDialog.Builder(this).SetTitle("Title").SetMessage("Message").setPositiveButton("OK", null);
alert.Show ();
return true;

我究竟做错了什么？