简而言之，我想创建一个可更新的列表框，它将在从ComboBox中选择一个选项时更新

<ListBox Background="Transparent" Width="Auto" Height="Auto" HorizontalAlignment="Right" ScrollViewer.CanContentScroll="true" ItemsSource="{Binding Lessons, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <WrapPanel>
                                <TextBlock Text="{Binding LessonText, UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}">
                                    <StackPanel>
                                        
                                     </StackPanel>
                                </TextBlock>
                                <Image Source="{Binding LessonImage, UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}" HorizontalAlignment="Center" Width="auto" MaxWidth="400"/>
                            </WrapPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>

更改变量的值Lesson将触发一个操作，该操作将使用元素填充对象列表

public class LessonData : BaseViewModel
  {
    public int _lessonID;
    public string _lessonText;
    public byte[] _lessonImage;

    public int LessonID { get { return _lessonID; } set { _lessonID = value; OnPropertyChanged(nameof(LessonID)); } }
    public string LessonText { get { return _lessonText; } set { _lessonText = value; OnPropertyChanged(nameof(LessonText)); } }
    public byte[] LessonImage { get { return _lessonImage; } set { _lessonImage = value; OnPropertyChanged(nameof(LessonImage)); } }
  }
public List<LessonData> editedLessons = new List<LessonData>();

 public List<LessonData> EditedLessons { get { return editedLessons; } set { editedLessons = value; OnPropertyChanged(nameof(EditedLessons)); } }

 public string Lesson { get { return _lesson; } set { _lesson = value; OnPropertyChanged(nameof(Lesson));
        if (Lesson == "None")
        {
          EditedLessons.Clear();
          IsLessonBeingEdited = false;
        }
        else
        {
          EditedLessons = lessonRepository.Obtain_Lesson_Content(Lesson);
          foreach (LessonData p in EditedLessons) { Console.WriteLine(p.LessonID, p.LessonText, p.LessonImage); }
          IsLessonBeingEdited = true;
        }
      } }

下面是来自存储库的函数

public List<LessonData> Obtain_Lesson_Content(string Lesson)
    {
      List<LessonData> lc = new List<LessonData>();
      using (var connection = GetConnection())
      using (var command = new SqlCommand())
      {
        connection.Open();
        command.Connection = connection;
        command.CommandText = "SELECT Id_Lesson_Content, Lesson_Text, Lesson_Image FROM [Lesson_Content] WHERE Id_Lesson_Title = (SELECT Id_Lesson FROM [Lesson_Title] WHERE Lesson_Title = @title)";
        command.Parameters.Add("@title", SqlDbType.NVarChar).Value = Lesson;
        using (var reader = command.ExecuteReader())
        {
          while (reader.Read())
          {
            LessonData model = new LessonData();
            model.LessonID = (int)reader["Id_Lesson_Content"];
            model.LessonText = reader["Lesson_Text"].ToString();
            if (reader["Lesson_Image"] != System.DBNull.Value)
              model.LessonImage = (byte[])reader["Lesson_Image"];
            else
              model.LessonImage = null;
            lc.Add(model);
          }
          reader.NextResult();
        }
        foreach (LessonData p in lc) { Console.WriteLine(p.LessonID, p.LessonText, p.LessonImage); }
        return lc;
      }
    }

然而，每次我调用这个函数时，我都会遇到抛出的错误（在这种情况下，它加载了两个对象，一个有图像，一个没有图像）：

System.Windows.Data Error: 1 : Cannot create default converter to perform 'two-way' conversions between types 'System.Byte[]' and 'System.Windows.Media.ImageSource'. Consider using Converter property of Binding. BindingExpression:Path=LessonImage; DataItem='LessonData' (HashCode=2419756); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')
System.Windows.Data Error: 5 : Value produced by BindingExpression is not valid for target property.; Value='System.Byte[]' BindingExpression:Path=LessonImage; DataItem='LessonData' (HashCode=2419756); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')
System.Windows.Data Error: 1 : Cannot create default converter to perform 'two-way' conversions between types 'System.Byte[]' and 'System.Windows.Media.ImageSource'. Consider using Converter property of Binding. BindingExpression:Path=LessonImage; DataItem='LessonData' (HashCode=10026414); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')

但对我来说，最奇怪的部分是，试图在控制台中编写所有列表对象会引发以下三个错误：

• 无法从int转换为char[]，
• 从string到int
• 从byte[]到int

foreach（LessonData p in lc）{ Console.WriteLine（p.LessonID，p.LessonText，p.LessonImage）;}
为什么会这样我已经看过我的其他相同/类似的功能，以同样的方式工作，他们都没有抛出这样的编译错误。最重要的是，当我通过将LessonID作为最后一个来更改对象元素的顺序时，它不会显示错误，（但是唯一显示的项目是LessonText）。
不管是什么原因，我相信它是隐藏在错误的背后与阅读名单。