PancakeView Lebel 文本绑定不起作用

Question

我在我的 xamarin 表单项目中使用 PancakeView Nuget，这是我的代码：

<yummy:PancakeView Margin="0,32,0,0" BackgroundColor="#E96C20" Padding="20,0"
                               HorizontalOptions="FillAndExpand" HeightRequest="150" CornerRadius="20">

                 <Label Text="{Binding Points}" HorizontalTextAlignment="Center" FontSize="Large"
                       HorizontalOptions="Center" VerticalOptions="Center" TextColor="#000000" />

                <yummy:PancakeView.Shadow>
                    <yummy:DropShadow x:Name="shadow" Color="Gray" Offset="30, 30"/>
                </yummy:PancakeView.Shadow>

            </yummy:PancakeView>

如您所见，我正在尝试从名为 points 的视图模型中绑定一个字符串，下面是它的 C# 代码：

public class PointsPageViewModel : ContentPage
   {
       public string Points = "0";
   }

但是，即使我确实在 xml 文件的开头定义了绑定上下文，它似乎也不起作用：

<ContentPage 
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:d="http://xamarin.com/schemas/2014/forms/design"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:yummy="clr-namespace:Xamarin.Forms.PancakeView;assembly=Xamarin.Forms.PancakeView"
    xmlns:vm="clr-namespace:MyProject.ViewModels"
    mc:Ignorable="d"
    x:Class="MyProject.Views.PointsPage" Title="POINTS">
     <ContentPage.BindingContext>
        <vm:PointsPageViewModel/>
    </ContentPage.BindingContext>

所以我不知道为什么会这样，绑定在 pancakeview 之外工作正常，所以我不明白为什么它不能在其中工作。如果有人以前遇到过这个问题并且知道如何解决，请告诉我！

Answer 1

您 xml 类需要看起来像下面的代码才能正确反序列化

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        const string FILENAME = @"c:\temp\test.xml";
        static void Main(string[] args)
        {
            string xml = File.ReadAllText(FILENAME);
            StringReader sReader = new StringReader(xml);
            XmlReader xReader = XmlReader.Create(sReader);
            XmlSerializer serializer = new XmlSerializer(typeof(ContentPage));
            ContentPage contentPage = (ContentPage)serializer.Deserialize(xReader);
        }
    }
    [XmlRoot(Namespace = "http://xamarin.com/schemas/2014/forms")]
    public class ContentPage
    {
        [XmlElement(ElementName = "ContentPage.BindingContext", Namespace = "http://xamarin.com/schemas/2014/forms")]
        public BindingContext BindingContext { get; set; } 
    }
    public class BindingContext
    {
        [XmlElement(Namespace = "clr-namespace:MyProject.ViewModels")]
        public string PointsPageViewModel { get; set; }
    }
}

PancakeView Lebel 文本绑定不起作用

PancakeView Lebel Text Binding not working

c#

xml

nuget

xamarin.forms