C# 对象删除后的序列化错误（NetDataContractSerializer）

我正在使用NetDataContractSerializer。我可以创建，添加和序列化对象到数据文件没有问题；将文件重新加载到GUI中没有问题

但是，当我试图从数据中删除（删除）对象并重新保存（序列化）数据时，遇到了一个问题

这是我的删除房间按钮；当用户请求删除特定楼层上的房间时，程序将创建位于该楼层上特定房间内的对象列表。然后删除它们，关闭它们正在查看的当前表单并保存数据

这似乎是可行的，因为程序不会崩溃，并且该房间将从当前楼层的房间列表中删除

但是，当我尝试重新加载文件（关闭程序、打开并加载）时，会出现以下错误：

“反序列化对象时出错。根级别的数据无效。第1行，位置1。”

这是我的房间按钮

      private void btn_deleteRoom_Click(object sender, EventArgs e)
    {
        var assets = getAssetsForCurrentRoom();
        string warningMessage = "Deleting this room will delete this room and all contained assets! Are you sure you want to do this?";
        string caption = "WARNING!";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;
        //Display the MessageBox
        result = MessageBox.Show(warningMessage, caption, buttons);
        if (result == System.Windows.Forms.DialogResult.Yes)
        {
            var itemsToRemove = new ArrayList();
            foreach (var item in currentHouse.GetAssets())
            {
                if (item.Parent.Name == currentRoom.Name)
                {
                    itemsToRemove.Add(item);
                }
            }
            foreach (var item in itemsToRemove)
            {
                currentHouse.deleteAsset((Asset)item);
            }
            currentHouse.DeleteRoom(currentRoom);
            PersistanceController.SaveHouseWithCurrentPath(currentHouse);
            this.Close();
        }
    }

这是我对方法deleteAsset（）的CRUD

这是我的持久控制器

 public static class PersistanceController
{

    public static string LastLoadedPath { get; set; }

    public static House LoadHouse(string path)
    {
        NetDataContractSerializer houseDeserializer = new NetDataContractSerializer();

        FileStream houseFileStream = new FileStream(path, FileMode.Open);
        House deserialzedHouse = (House)houseDeserializer.Deserialize(houseFileStream);

        houseFileStream.Close();

        LastLoadedPath = path;

        return deserialzedHouse;
    }

    public static void SaveHouseWithCurrentPath(House house)
    {
        SaveHouse(house, LastLoadedPath);
    }

    public static void SaveHouse(House house, string path)
    {

        //save house
        NetDataContractSerializer xmlSerializer = new NetDataContractSerializer();
        Stream streamWriter = new FileStream(path, FileMode.OpenOrCreate);
        xmlSerializer.Serialize(streamWriter, house);

        streamWriter.Close();
    }
}

---

我想你的问题可能是

FileMode.open或create

。创建，否则您将从原始（较长）文件中得到一个不需要的尾部

另外，在主题旁边，使用

using（）{}

块来处理文件流

 public static class PersistanceController
{

    public static string LastLoadedPath { get; set; }

    public static House LoadHouse(string path)
    {
        NetDataContractSerializer houseDeserializer = new NetDataContractSerializer();

        FileStream houseFileStream = new FileStream(path, FileMode.Open);
        House deserialzedHouse = (House)houseDeserializer.Deserialize(houseFileStream);

        houseFileStream.Close();

        LastLoadedPath = path;

        return deserialzedHouse;
    }

    public static void SaveHouseWithCurrentPath(House house)
    {
        SaveHouse(house, LastLoadedPath);
    }

    public static void SaveHouse(House house, string path)
    {

        //save house
        NetDataContractSerializer xmlSerializer = new NetDataContractSerializer();
        Stream streamWriter = new FileStream(path, FileMode.OpenOrCreate);
        xmlSerializer.Serialize(streamWriter, house);

        streamWriter.Close();
    }
}