自定义类型不隐式转换为用于绑定的字符串

我创建了一个自定义类型,基本上是一个字符串,但是当绑定到wp if时,会给出一个转换异常。

public class SelectedProfileName: IConvertible
{
    private string _value;
    public string Value { get { return _value; } set { _value = value; } }

    public SelectedProfileName(string value)
    {
        this._value = value;
    }

    public static implicit operator string(SelectedProfileName d)
    {
        return d.Value;
    }
    public static implicit operator SelectedProfileName(string d)
    {
        return new SelectedProfileName(d);
    }

    public override string ToString()
    {
        return Value;
    }

    public TypeCode GetTypeCode()
    {
        return Value.GetTypeCode();
    }

    public bool ToBoolean(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToBoolean(provider);
    }

    public char ToChar(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToChar(provider);
    }

    public sbyte ToSByte(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToSByte(provider);
    }

    public byte ToByte(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToByte(provider);
    }

    public short ToInt16(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToInt16(provider);
    }

    public ushort ToUInt16(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToUInt16(provider);
    }

    public int ToInt32(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToInt32(provider);
    }

    public uint ToUInt32(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToUInt32(provider);
    }

    public long ToInt64(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToInt64(provider);
    }

    public ulong ToUInt64(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToUInt64(provider);
    }

    public float ToSingle(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToSingle(provider);
    }

    public double ToDouble(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToDouble(provider);
    }

    public decimal ToDecimal(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToDecimal(provider);
    }

    public DateTime ToDateTime(IFormatProvider provider)
    {
        return ((IConvertible)Value).ToDateTime(provider);
    }

    public string ToString(IFormatProvider provider)
    {
        return Value.ToString(provider);
    }

    public object ToType(Type conversionType, IFormatProvider provider)
    {
        return ((IConvertible)Value).ToType(conversionType, provider);
    }
}

绑定到它的文本框时出现的错误是:

System.ArgumentException:“system.string”类型的对象不能为 已转换为“myapp.selectedprofilename”类型。

我以为隐式算符是为了实现这一点?

值得注意的是,这并不是直接绑定的,而是通过一个包装类来公开绑定用例中属性所需的属性和其他选项,这里是包装器,错误会抛出到value.set访问器上。

public class PropertyValue : INotifyPropertyChanged
{
    private PropertyInfo propertyInfo;
    private object baseObject;

    public event PropertyChangedEventHandler PropertyChanged;

    public PropertyValue(PropertyInfo propertyInfo, object baseObject)
    {
        this.propertyInfo = propertyInfo;
        this.baseObject = baseObject;

        if (baseObject is INotifyPropertyChanged)
        {
            (baseObject as INotifyPropertyChanged).PropertyChanged += (s, e) =>
            {
                if (e.PropertyName == propertyInfo.Name)
                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(null));
            };
        }
    }

    public string name { get { return propertyInfo.Name; } }

    public string displayName { get { return propertyType.getCustomNameAttribute(); } }

    public Type propertyType { get { return propertyInfo.PropertyType; } }

    public object value
    {
        get { return propertyInfo.GetValue(baseObject, null); }
        set { propertyInfo.SetValue(baseObject, value, null); }
    }

    public bool isSetable { get { return propertyInfo.GetSetMethod() != null; } }
}