我正在遵循MSDN中的这个基本示例,但是似乎有些错误。运行程序时出现此错误
错误消息:
Binding: 'Title' property not found on 'HelloWorld.MainPage+Post', target property: 'Xamarin.Forms.TextCell.Text'
我在某处找到了一篇有关设置 BindingContext 的文章,但这并没有解决任何问题。任何指导将不胜感激。
XAML代码:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:HelloWorld"
x:Class="HelloWorld.MainPage">
<ListView x:Name="rssList">
<ListView.ItemTemplate>
<DataTemplate>
<TextCell Text="{Binding Title}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
MainPage.xaml.cs代码
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;
using Xamarin.Forms;
namespace HelloWorld
{
public partial class MainPage : ContentPage
{
ObservableCollection<Post> posts = new ObservableCollection<Post>();
public MainPage()
{
InitializeComponent();
var posts = new
RssFeedReader().ReadFeed(@"http://www.espn.com/espn/rss/news");
Console.WriteLine(posts.ToList().Count);
Console.ReadLine();
rssList.ItemsSource = posts;
BindingContext = this;
}
public class RssFeedReader
{
public string Title { get; set; }
public ObservableCollection<Post> ReadFeed(string url)
{
var rssFeed = XDocument.Load(url);
var rssPost = from item in rssFeed.Descendants("item")
select new Post
{
Title = item.Element("title").Value,
Description = item.Element("description").Value,
PublishedDate = item.Element("pubDate").Value
};
var myObservableCollection = new ObservableCollection<Post>(rssPost);
return myObservableCollection;
}
}
public class Post
{
public string PublishedDate;
public string Description;
public string Title;
}
}
}
答案 0 :(得分:1)
为了将DataBinding
与Post
类一起使用,它应该具有properties。因此,至少标题应如下所示:
public string Title { get; set; }
P.S .:不需要将BindingContext
设置为self,因为您直接设置了ItemSource
,而没有涉及数据绑定引擎。