VS不检测命名空间中的转换函数

我使用VS2013并构建Windows商店应用程序。解析器未检测species_to_chart_itemsource_converter函数。具体错误:

名称'…命名空间'…'中不存在

我甚至尝试使用clr-namespace:Sustenance_V_1。0，但徒劳。我还尝试在新的。cs文件中定义新的名称空间，但似乎没有任何作用。我已经提到了这个问题:xaml解析器没有检测到我的转换器

请帮助。

PS:我已经在MainPage本身定义了一个类物种，但没有在这里显示。

这是我的mainpage . example .cs文件:

    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Runtime.InteropServices.WindowsRuntime;
    using Windows.Foundation;
    using Windows.Foundation.Collections;
    using Windows.UI.Xaml;
    using Windows.UI.Xaml.Controls;
    using Windows.UI.Xaml.Controls.Primitives;
    using Windows.UI.Xaml.Data;
    using Windows.UI.Xaml.Input;
    using Windows.UI.Xaml.Media;
    using Windows.UI.Xaml.Navigation;
    using Windows.UI.Xaml.Shapes;
    using WinRTXamlToolkit.Controls.DataVisualization.Charting;

    // The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
    namespace Sustenance_V_1._0
    {
        /// <summary>
        /// An empty page that can be used on its own or navigated to within a Frame.
        /// </summary>
        public sealed partial class MainPage : Page
        {

            //===========Converters==========//
            public class species_to_chart_itemsource_converter : IValueConverter
            {
                public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
                {
                    var sp = parameter as species;
                    List<Population> data = new List<Population>();
                    data.Add(new Population() { Name = "Healthy", Amount = sp.healthy });
                    data.Add(new Population() { Name = "Healthy", Amount = sp.sick });
                    return data;
                }
                public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
                {
                    return true;
                }
            }
            public MainPage()
            {
                this.InitializeComponent();
                add_species(all_species);
                link_members(all_species);
                LoadChartContents(all_species);
            }
            void MainPage_Loaded(object sender, RoutedEventArgs e)
            {
            }
       }
   }

这是主页的顶部。xaml文件:

<Page
    xmlns:Charting="using:WinRTXamlToolkit.Controls.DataVisualization.Charting"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Sustenance_V_1._0"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:DataVisualization="using:WinRTXamlToolkit.Controls.DataVisualization" xmlns:Controls="using:WinRTXamlToolkit.Controls" x:Name="page"
    xmlns:l="clr-namespace:Sustenance_V_1._0"
    x:Class="Sustenance_V_1._0.MainPage"
    mc:Ignorable="d">
    <Page.Resources>
        <Style TargetType="Image">
            <Setter Property="Stretch" Value="Uniform"/>
        </Style>
        <local:species_to_chart_itemsource_converter x:Key="chart_converter"/>
    </Page.Resources>

namespace Sustenance_V_1._0
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            add_species(all_species);
            link_members(all_species);
            LoadChartContents(all_species);
        }
        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
        }
    }
    //This could be in a different file, but I placed it outside the class here just to illustrate.
    //===========Converters==========//
    public class species_to_chart_itemsource_converter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            var sp = parameter as species;
            List<Population> data = new List<Population>();
            data.Add(new Population() { Name = "Healthy", Amount = sp.healthy });
            data.Add(new Population() { Name = "Healthy", Amount = sp.sick });
            return data;
        }
        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return true;
        }
    }
}