XamlParseException當加載頁面

Question

我在我的應用程序中發現了一個奇怪的問題。當我打開其中一個頁面時，應用程序的InitializeComponent（）方法將引發XamlParseException。我能做些什麼來擺脫這個問題？我還沒有在我的xaml代碼中發現任何明顯的錯誤。在這裏，你可以看到我的.cs和頁面的.xaml文件：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Net; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Navigation; 
using Microsoft.Phone.Controls; 
using Microsoft.Phone.Shell; 
using System.IO.IsolatedStorage; 

namespace app_name 
{ 
public partial class newsummaryPage : PhoneApplicationPage 
{ 
    List<String> savingList; 
    List<String> projectList; 
    List<String> subjectsList; 

    IsolatedStorageSettings settings; 
    Boolean amISelectingProjects = true; 
    Boolean firstSelection = true; 

    String practicesummaryText; 
    public newsummaryPage() 
    { 
     InitializeComponent(); 

     //Initialize settings 
     settings = IsolatedStorageSettings.ApplicationSettings; 
    } 

    private void nextButton_Click(object sender, RoutedEventArgs e) 
    { 
     //Load existing list into the savingList (For temporary storage) 
     savingList = null; 
     savingList = readSetting("practiceList") != null ? (List<String>)readSetting("practiceList") : new List<String>(); 

     //Remove existing practiceList from IsolatedStorage 
     settings.Remove("practiceList"); 

     //Add the new practice summary to the savingList 
     savingList.Add(practiceTextBox.Text.ToString()); 

     //Save the savingList into practiceList in IsolatedStorage 
     settings.Add("practiceList", savingList); 

     //Save the summary text itself. Add "-practicesummary" to the end of the name to be able to add it without conflicts with the projectList and it's references 
     settings.Add(practiceTextBox.Text.ToString() + "-practicesummary", practicesummaryText); 

     //Save the settings 
     settings.Save(); 

     MessageBox.Show("next"); 
    } 

    private void newsummaryPage_Loaded(object sender, RoutedEventArgs e) 
    { 
     //Initialize the list 
     projectList = new List<String>(); 
     try 
     { 
      //Load existing list 
      selectprojectsandsubjectsListBox.Items.Clear(); 
      projectList.Clear(); 
      MessageBox.Show("loaded"); 
      projectList = readSetting("projectList") != null ? (List<String>)readSetting("projectList") : new List<String>(); 

      selectprojectsandsubjectsListBox.ItemsSource = projectList; 
     } 
     catch (Exception) 
     { 
      //run method CurrentProjectNotEmpty(); 
     } 
    } 

    private static object readSetting(string key) 
    { 
     return IsolatedStorageSettings.ApplicationSettings.Contains(key) ? IsolatedStorageSettings.ApplicationSettings[key] : null; 
    } 

    private void selectprojectsandsubjectsListBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e) 
    { 
    } 

    private void selectprojectsandsubjectsListBox_Tap(object sender, System.Windows.SizeChangedEventArgs e) 
    { 
     //Select a project/subject depending on the amISelectingProjects variable 
     if (amISelectingProjects.Equals(true)) 
     { 
      //The user is selecting a project. Get the name from the project and use it to get the subjects 
      var selectedItem = selectprojectsandsubjectsListBox.SelectedItem as String; 
      String item = selectedItem; 

      MessageBox.Show("select"); 
      subjectsList = readSetting(item) != null ? (List<String>)readSetting(item) : new List<String>(); 
      selectprojectsandsubjectsListBox = null; 
      selectprojectsandsubjectsListBox.ItemsSource = subjectsList; 

      //Set amISelectingProjects to false so that the user can select subjects next time 
      amISelectingProjects = false; 

      //Set the ListBox to multiple selection mode for selecting multiple subjects 
      selectprojectsandsubjectsListBox.SelectionMode = SelectionMode.Multiple; 

      //Tell the user what he should do next 
      MessageBox.Show("The subjects corresponding the the project you selected will now appear in the list. Tap on all the items you want to create a summary of and then press create when you're finished."); 
     } 
     else if (amISelectingProjects.Equals(false)) 
     { 
      //The user is selecting a subject. Select multipe 
      if (firstSelection.Equals(true)) 
      { 
       practicesummaryText = selectprojectsandsubjectsListBox.SelectedItem as String; 
       firstSelection = false; 
      } 
      else if (firstSelection.Equals(false)) 
      { 
       //This is not the first subject that the user selects, therefore add some characters in between 
       practicesummaryText = practicesummaryText + ". New subject= " + selectprojectsandsubjectsListBox.SelectedItem as String; 
      } 
     } 
    } 
} 
} 

我的XAML文件：

<phone:PhoneApplicationPage 
x:Class="app_name.newsummaryPage" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone" 
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone" 
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
FontFamily="{StaticResource PhoneFontFamilyNormal}" 
FontSize="{StaticResource PhoneFontSizeNormal}" 
Foreground="{StaticResource PhoneForegroundBrush}" 
SupportedOrientations="Portrait" Orientation="Portrait" 
mc:Ignorable="d" 
shell:SystemTray.IsVisible="True"> 

<!--LayoutRoot is the root grid where all page content is placed--> 
<Grid x:Name="LayoutRoot" Background="#FF03171B" Loaded="newsummaryPage_Loaded"> 
    <Grid.RowDefinitions> 
     <RowDefinition Height="Auto" MinHeight="1111"/> 
     <RowDefinition Height="0*"/> 
    </Grid.RowDefinitions> 

    <!--TitlePanel contains the name of the application and page title--> 
    <StackPanel Grid.Row="0" Margin="12,0,0,0" Height="116" VerticalAlignment="Top"> 
     <TextBlock Text="app name" Style="{StaticResource PhoneTextNormalStyle}"/> 
     <TextBlock Text="New summary" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/> 
    </StackPanel> 
    <Grid x:Name="newsummaryGrid" Margin="0,116,12,370"> 
     <TextBox x:Name="practiceTextBox" HorizontalAlignment="Left" TextWrapping="Wrap" Width="458" Margin="0,27,0,0" Height="72" VerticalAlignment="Top"/> 
     <TextBlock HorizontalAlignment="Left" Margin="10,0,0,0" TextWrapping="Wrap" Text="Enter a new name for your summary:" VerticalAlignment="Top"/> 
     <Button x:Name="nextButton" Content="Create the summary" HorizontalAlignment="Left" Margin="0,553,0,0" VerticalAlignment="Top" Width="456" Click="nextButton_Click"/> 
     <ListBox x:Name="selectprojectsandsubjectsListBox" Margin="10,99,12,80" SelectionChanged="selectprojectsandsubjectsListBox_SelectionChanged" FontSize="36" Tap="selectprojectsandsubjectsListBox_Tap"/> 
    </Grid> 

    <!--ContentPanel - place additional content here--> 
</Grid> 

</phone:PhoneApplicationPage> 

內部異常：

• $異常{System.Windows.Markup .XamlParseException：未能分配給屬性'System.Windows.UIElement.Tap'。 [Line：32 Position：172] at System.Windows.Application.LoadComponent（Object component，Uri resourceLocator） at Knowledge_Organizer.newsummaryPage.InitializeComponent（） at Knowledge_Organizer.newsummaryPage..ctor（）} System.Exception {System。 Windows.Markup.XamlParseException}

Answer 1

看到輸出窗口，它usualy包含有關異常的內容有用的信息。

或者當出現異常窗口時，按break鍵並進入visual studio DEBUG菜單，選擇windows-> locals。該異常應該出現在當地人視圖中。

或嘗試調試並捕獲異常，而不是看到它的屬性和內部消息。