ContentPage中的Xamarin公共变量

Question

为什么我在ContentPage中创建的变量为空

ReceiptPage.xaml.cs

using System;
using System.Collections.Generic;
using Xamarin.Forms;
namespace LiquidCalc


public partial class ReceiptPage : ContentPage
{

    public string OutAromaProp { get; set; }
    public string OutShotProp { get; set; }
    public string OutBasisProp { get; set; }

    public ReceiptPage()
    {


        InitializeComponent();
        BindingContext = this;

        OutAroma.Text = "Hallo:"+ OutAromaProp;


    }

}

在主页上

 var page = new ReceiptPage
        {
            OutAromaProp ="Hallo", //"Aroma: " + AromaOut.ToString() + " ml",
            OutShotProp = "Nikotien Shot " + NikoteinMG.Text + "mg: " + Math.Round(NikoteinShot).ToString() + " ml",
            OutBasisProp = "Basis: " + Math.Round(Basis).ToString() + "ml",

        };
        await Navigation.PushModalAsync(page,true);

标签仅获得值“ Hallo：”，未分配变量OutAromaProp。 为什么？

Answer 1

好的，我有它，它不会因为异步原因而工作。 这个解决了我的问题

 protected override void OnAppearing()
    {
        base.OnAppearing();
        OutAroma.Text = OutAromaProp;
        OutShot.Text = OutShotProp;
        OutBasis.Text = OutBasisProp;
    }