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我不知道为什么我的类不能被序列化。

c#windows-phone-7data-bindingserialization
6

我完成了我的应用程序编码。但是当我点击“开始”按钮时，我的应用程序出现了异常.. :'(


A first chance exception of type 'System.Runtime.Serialization.InvalidDataContractException' occurred in System.Runtime.Serialization.dll
A first chance exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll
A first chance exception of type 'System.Runtime.Serialization.InvalidDataContractException' occurred in System.Runtime.Serialization.dll

我看到了“Application_UnhandledException”的参数e，并且我能够知道原因。

“'类型 'GPACalculator.Subject' 无法被序列化。考虑使用DataContractAttribute属性标记它，并使用DataMemberAttribute属性标记您想要序列化的所有成员。”

我只是使用默认数据类型创建了我的类。

public class Subject : INotifyPropertyChanged
{
    private string name;
    private GradePoint gradePoint;
    private int credit;

    public Subject(string name)
    {
        Name = name;
        GradePoint = new GradePoint();
    }

    public string Name
    {
        get { return name; }
        set
        {
            Debug.WriteLine("Name: " + value);
            if (name != value)
            {
                name = value;
                OnPropertyChanged("Name");
            }
        }

    }

    public GradePoint GradePoint
    {
        get { return gradePoint; }
        set
        {
            if (gradePoint != value)
            {
                gradePoint = value;
                OnPropertyChanged("GradePoint");
            }
        }
    }

    public int Credit
    {
        get { return credit; }
        set
        {
            if (credit != value)
            {
                credit = value;
                OnPropertyChanged("Credit");
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}


public class GradePoint : INotifyPropertyChanged
{
    private string mainGradePoint;
    private string subGradePoint;
    private int credit;

    public int Credit
    {
        get { return credit; }
        set
        {
            if (credit != value)
            {
                credit = value;
                OnPropertyChanged("Credit");
            }
        }
    }

    public string MainGradePoint
    {
        get { return mainGradePoint; }
        set
        {
            value = value.ToUpper();
            if (mainGradePoint != value)
            {
                mainGradePoint = value;
                OnPropertyChanged("MainGradePoint");
            }
        }
    }

    public string SubGradePoint
    {
        get { return subGradePoint; }
        set
        {
            if (subGradePoint != value)
            {
                subGradePoint = value;
                OnPropertyChanged("SubGradePoint");
            }
        }
    }

    public override string ToString()
    {
        return string.Format("{0}{1}", mainGradePoint, subGradePoint);
    }

    public double ToDouble(double perfectScore = 4.5F)
    {
        double gap = perfectScore - Math.Floor(perfectScore);
        double value;


        switch (mainGradePoint)
        {
            case "A":
                value = 4.0;
                break;
            case "B":
                value = 3.0;
                break;
            case "C":
                value = 2.0;
                break;
            case "D":
                value = 1.0;
                break;
            default:
                value = 0.0;
                return value;
        }

        switch (subGradePoint)
        {
            case "+":
                value += gap;
                break;
            case "-":
                value -= gap;
                break;
        }

        return value;
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

以下是我的课程表...
请帮助我。
5个回答
13

首先，需要使用适合你要使用的序列化器的属性来装饰你的类，例如针对BinaryFormatter，使用[Serializable]，或者针对基于协定的格式化器，使用[DataContract]。

注意：如果你使用[Serializable]属性，请记得用[field:NonSerialized]标记事件字段，否则所有这些事件的监听器也会被序列化。

6

正如错误所述，您需要使用DataContract属性对类进行修饰以将其定义为可序列化，并使用DataMember属性对其属性进行修饰。只有使用DataMember修饰的公共属性才能被序列化。您的方法和事件则不能。

[DataContract]
public class Subject
{
    [DataMember]
    public string Name{get;set;}
}

更多信息请点击此处

2
您可以尝试使用属性标记类。
[DataContract]
public class Subject : ...

或者将其标记为可序列化，方法如下：
[Serializable]
public class Subject : ...
0

在这种情况下，两个类都应该是可序列化的。请向类添加 [Serializable]。

0
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