可以帮我解决这个错误吗？当我构建我的语法没有错误，tp当我执行错误出现时，我一直在使用所有手段开始运行VS 2015 deng以管理员身份运行直到exeption设置但没有任何变化。任何想法？
这是XAML：
<Page
x:Class="berhasil.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:berhasil"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:converter="using:berhasil"
mc:Ignorable="d">
<Page.Resources>
<converter:Converter x:Key="Converter" />
</Page.Resources>
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Row="0" Text="Input Value: " VerticalAlignment="Center"/>
<TextBox x:Name="textbox"
Grid.Row="0"
Grid.Column="1"
Margin="0,10,0.333,0"
Width="154"
VerticalAlignment="Center"
InputScope="Number"/>
<StackPanel Grid.Column="2"
Grid.Row="0"
VerticalAlignment="Center"
Margin="20,10,0,10"
Orientation="Horizontal">
<ComboBox x:Name="combobox"
ItemsSource="{x:Bind ComboBoxOptions}"
SelectedItem="{x:Bind SelectedComboBoxOption, Mode=TwoWay, Converter={StaticResource ComboBoxItemConvert}}"
SelectedValuePath="ComboBoxOption"
DisplayMemberPath="ComboBoxOption">
</ComboBox>
</StackPanel>
<Button Grid.Row="1" x:Name="button"
Content="Conversion"
HorizontalAlignment="Center" Margin="78,0,0.333,0"
Width="154" Grid.ColumnSpan="2"
Click="button_Click"/>
<TextBlock Grid.Row="2" Text="Celcius: " VerticalAlignment="Center"/>
<TextBox x:Name="textbox1"
Grid.Row="2"
Margin="78,10,-23.333,0"
Grid.ColumnSpan="3"
VerticalAlignment="Center"
InputScope="Number"
IsReadOnly="True"/>
<TextBlock Grid.Row="3" Text="Reamur: " VerticalAlignment="Center"/>
<TextBox x:Name="textbox2"
Grid.Row="3"
Margin="78,10,-23.333,0"
Grid.ColumnSpan="3"
VerticalAlignment="Center"
InputScope="Number"
IsReadOnly="True"/>
<TextBlock Grid.Row="4" Text="Fahrenheit: " VerticalAlignment="Center"/>
<TextBox x:Name="textbox3"
Grid.Row="4"
Margin="78,10,-23.333,0"
Grid.ColumnSpan="3"
VerticalAlignment="Center"
InputScope="Number"
IsReadOnly="True"/>
<TextBlock Grid.Row="5" Text="Kelvin: " VerticalAlignment="Center"/>
<TextBox x:Name="textbox4"
Grid.Row="5"
Margin="78,10,-23.333,0"
Grid.ColumnSpan="3"
VerticalAlignment="Center"
InputScope="Number"
IsReadOnly="True"/>
</Grid>
</Page>
这就是背后的代码：
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Xml.Serialization;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
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;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
namespace berhasil
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page, INotifyPropertyChanged
{
Double awal, celcius, reamur, fahrenheit, kelvin;
private ObservableCollection<ComboBoxItem> ComboBoxOptions;
public int ComboBoxId { get; private set; }
ApplicationDataContainer roamingSettings = null;
public MainPage()
{
this.InitializeComponent();
ComboBoxOptions = new ObservableCollection<ComboBoxItem>();
ComboBoxOptionsManager.GetComboBoxList(ComboBoxOptions);
roamingSettings = ApplicationData.Current.RoamingSettings;
var value = (string)roamingSettings.Values["ComboBoxSelection"];
if (value != null)
{
var deserialized = Deserialize<ComboBoxItem>(value);
// using ComboBoxOption as the primary key field of your object
SelectedComboBoxOption = ComboBoxOptions.SingleOrDefault(c =>
c.ComboBoxOption == deserialized.ComboBoxOption);
}
else
{
SelectedComboBoxOption = ComboBoxOptions[0];
}
}
public class ComboBoxItem
{
public int ComboBoxId { get; set; }
public string ComboBoxOption { get; set; }
}
public class ComboBoxOptionsManager
{
public static void GetComboBoxList(ObservableCollection<ComboBoxItem> ComboBoxItems)
{
var allItems = getComboBoxItems();
ComboBoxItems.Clear();
allItems.ForEach(p => ComboBoxItems.Add(p));
}
private static List<ComboBoxItem> getComboBoxItems()
{
var items = new List<ComboBoxItem>();
items.Add(new ComboBoxItem() { ComboBoxId = 1, ComboBoxOption = "Celcius"});
items.Add(new ComboBoxItem() { ComboBoxId = 2, ComboBoxOption = "Reamur" });
items.Add(new ComboBoxItem() { ComboBoxId = 3, ComboBoxOption = "Fahrenheit" });
items.Add(new ComboBoxItem() { ComboBoxId = 4, ComboBoxOption = "Kelvin" });
return items;
}
}
private ComboBoxItem _SelectedComboBoxOption;
public ComboBoxItem SelectedComboBoxOption
{
get
{
return _SelectedComboBoxOption;
}
set
{
if (_SelectedComboBoxOption != value)
{
_SelectedComboBoxOption = value;
roamingSettings.Values["ComboBoxSelection"] = Serialize(value);
RaisePropertyChanged("SelectedComboBoxOption");
}
}
}
public static string Serialize(object obj)
{
using (var sw = new StringWriter())
{
var serializer = new XmlSerializer(obj.GetType());
serializer.Serialize(sw, obj);
return sw.ToString();
}
}
public static T Deserialize<T>(string xml)
{
using (var sw = new StringReader(xml))
{
var serializer = new XmlSerializer(typeof(T));
return (T)serializer.Deserialize(sw);
}
}
void RaisePropertyChanged(string prop)
{
if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(prop)); }
}
public event PropertyChangedEventHandler PropertyChanged;
private void button_Click(object sender, RoutedEventArgs e)
{
if (Equals(ComboBoxId = 1))
{
awal = Convert.ToDouble(textbox.Text);
celcius = awal;
textbox1.Text = celcius.ToString();
reamur = 0.8 * awal;
textbox2.Text = reamur.ToString();
fahrenheit = (1.8 * awal) + 32;
textbox3.Text = fahrenheit.ToString();
kelvin = awal + 273;
textbox4.Text = kelvin.ToString();
}
else if (Equals(ComboBoxId = 2))
{
awal = Convert.ToDouble(textbox.Text);
celcius = 1.25 * awal;
textbox1.Text = celcius.ToString();
reamur = awal;
textbox2.Text = reamur.ToString();
fahrenheit = (2.25 * awal) + 32;
textbox3.Text = fahrenheit.ToString();
kelvin = celcius + 273;
textbox4.Text = kelvin.ToString();
}
else if (Equals(ComboBoxId = 3))
{
awal = Convert.ToDouble(textbox.Text);
celcius = 0.55555 * (awal - 32);
textbox1.Text = celcius.ToString();
reamur = 0.44444 * (awal - 32);
textbox2.Text = reamur.ToString();
fahrenheit = awal;
textbox3.Text = fahrenheit.ToString();
kelvin = celcius + 273;
textbox4.Text = kelvin.ToString();
}
else if (Equals(ComboBoxId = 4))
{
awal = Convert.ToDouble(textbox.Text);
celcius = awal - 273;
textbox1.Text = celcius.ToString();
reamur = 0.8 * (awal - 273);
textbox2.Text = reamur.ToString();
fahrenheit = (1.8 * (awal - 273)) + 32;
textbox3.Text = fahrenheit.ToString();
kelvin = awal;
textbox4.Text = kelvin.ToString();
}
}
}
public class Converter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, string language)
{
return value;
}
public object ConvertBack(object value, Type targetType, object parameter, string language)
{
return value as MainPage.ComboBoxItem;
}
}
}
答案 0 :(得分：0)
Combobox可能导致问题。此外，您使用的是至少在此页面中缺少的ComboBoxItemConvert转换器！