Question

我目前正在尝试序列化List，它序列化（我认为很好），但是当它反序列化时，

很抱歉代码的数量，但我真的很困难，不知道为什么会发生这种情况，我也试图将结构改成一个类而没有帮助。

感谢。

我收到以下错误更新

    There was an error deserializing the object of type There was an error deserializing the object of type 
`System.Collections.Generic.List`1[[A.B.C.DataValues, A.V, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]. Unexpected end of file. Following elements are not closed: Time, DataValues, ArrayOfDataValues.`

我正在按照 UPDATED

进行序列化

     public void SerializeDataValue(List<DataValues> values)
            {
                DataContractSerializer serializer = new DataContractSerializer(typeof(List<DataValues>));

                using (MemoryStream stream = new MemoryStream())
                {
                    using (GZipStream compress = new GZipStream(stream, CompressionMode.Compress))
                    {
                        XmlDictionaryWriter w = XmlDictionaryWriter.CreateBinaryWriter(compress);
                        serializer.WriteObject(w, values);

                    }
                    _serializedData = stream.ToArray();
                }
            }

我正在反序列化 UPDATED

 public List<DataValues> DeserializeDataValue()
{
    if (SerializedData == null || SerializedData.Length == 0)
    {
        return new List<DataValues> ();
    }
    else
    {
        DataContractSerializer serializer = new DataContractSerializer(typeof(List<DataValues>));
        using (MemoryStream stream = new MemoryStream(SerializedData))
        {
            using (GZipStream decompress = new GZipStream(stream, CompressionMode.Decompress))
            {
                XmlDictionaryReader r = XmlDictionaryReader.CreateBinaryReader(decompress, XmlDictionaryReaderQuotas.Max);
                return serializer.ReadObject(r, true) as List<DataValues>;
            }
        }
    }
}

属性

private byte[] _serializedData;

[DataMember]
[Browsable(false)]
public byte[] SerializedData
{
    get { return _serializedData; }
    set { _serializedData = value; }
}

帮助方法

public static byte[] ReadFully(Stream input)
{
    byte[] buffer = new byte[16 * 1024];
    input.Position = 0;
    using (MemoryStream ms = new MemoryStream())
    {
        int read;
        while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
        {
            ms.Write(buffer, 0, read);
        }
        return ms.ToArray();
    }
}

STRUCT

[DataContract(Name = "DataValues", Namespace = "A.B.C")]
public struct DataValues
{
    [DataMember]
    public DateTime Time { get; set; }
    [DataMember]
    public Single Value { get; set; }

    public DataValues(DateTime dateTime, Single value)
    {
        Time = dateTime;
        Value = value;
   }
}

Answer 1

这是因为您没有完全序列化对象。您需要在写入后关闭流，尤其是在使用gzip时。建议的做法是使用using：

public void SerializeDataValue(List<DataValues> values)
{
    DataContractSerializer serializer = new DataContractSerializer(typeof(List<DataValues>));
    using (MemoryStream stream = new MemoryStream())
    {
        using (GZipStream compress = new GZipStream(stream, CompressionMode.Compress))
        {
            XmlDictionaryWriter w = XmlDictionaryWriter.CreateBinaryWriter(compress);
            serializer.WriteObject(w, values);
        }
        _serializedData = stream.ToArray();
    }
}

Answer 2

很抱歉这个问题迟到了。

初始方法的问题只是你没有刷新（读取：处理） XmlDictionaryWriter 。

这应该有用（注意第二个使用条款）：

using (GZipStream compress = new GZipStream(stream, CompressionMode.Compress))
using (XmlDictionaryWriter w = XmlDictionaryWriter.CreateBinaryWriter(compress))
{
    serializer.WriteObject(w, values);
}

希望这有助于某人。

Answer 3

我可以通过删除XmlDictionaryReader来获取样本，而是直接将输入/输出流提供给DataContractSerializer。对于大型压缩集合，它可能是XmlDictionaryReader中的一个缺陷，但我不确定。

希望这会有所帮助：

public void SerializeDataValue(List<DataValues> values)
            {
                DataContractSerializer serializer = new DataContractSerializer(typeof(List<DataValues>));
                    using (MemoryStream stream = new MemoryStream())
                {
                    using (GZipStream compress = new GZipStream(stream, CompressionMode.Compress))
                    {
                        serializer.WriteObject(compress , values);

                    }
                    _serializedData = stream.ToArray();
                }
            }

    public List<DataValues> DeserializeDataValue()
    {
        if (SerializedData == null || SerializedData.Length == 0)
        {
            return new List<DataValues> ();
        }
        else
        {
            DataContractSerializer serializer = new DataContractSerializer(typeof(List<DataValues>));
            using (MemoryStream stream = new MemoryStream(SerializedData))
            {
                using (GZipStream decompress = new GZipStream(stream, CompressionMode.Decompress))
                {
                    return serializer.ReadObject(decompress , true) as List<DataValues>;
                }
            }
        }
    }

Answer 4

我遇到了同样的问题，我终于找到了解决方案：在您编写的Stream本身已关闭之前，需要处理/关闭XmlDictionaryWriter。我发现，感谢在http://www.albahari.com/nutshell/ch15.aspx找到的完整示例，这些示例比MSDN更完整。

在您的示例代码中，这将是：

            using (XmlDictionaryWriter w = XmlDictionaryWriter.CreateBinaryWriter(compress))
            {
                serializer.WriteObject(w, values);
            }

在我自己的例子中，使用XmlDictionaryWriter而不是普通的默认Xml编写器只能使文件大小减少约25％，但在读回对象时减少了3倍。

DataContractSerializer序列化List <t>获取错误</t>

4 个答案: