Question

我在AppFabric中使用了两个命名缓存：

CacheA只是[string，string]对，并没有以任何特殊方式使用
CacheB是[string，object]对（其中object是可序列化类型），并用作ASP.NET MVC4站点的Session存储

我有一个单独的VS Project，它试图枚举缓存的全部内容并输出每个项目：

foreach (string regionName in cache.GetSystemRegions()) {
    foreach (var cacheItem in cache.GetObjectsInRegion(regionName)) {
        Trace.WriteLine(String.Format("{0} \t\t {1}", cacheItem.Key, cacheItem.Value));
    }
}

这适用于CacheA，但使用CacheB运行会引发异常（当cache.GetObjectsInRegion（）返回非空的内容时）：

Assembly 'Microsoft.Web.DistributedCache, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' is not found. ---> System.Runtime.Serialization.SerializationException: Assembly 'Microsoft.Web.DistributedCache, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' is not found.
   at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns)
   at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, String name, String ns)
   at System.Runtime.Serialization.NetDataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName)
   at System.Runtime.Serialization.XmlObjectSerializer.InternalReadObject(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader)
   at Microsoft.ApplicationServer.Caching.Utility.Deserialize(Byte[][] buffers, Boolean checkTypeToLoad, Object context, IEnumerable`1 knownTypes)
   at Microsoft.ApplicationServer.Caching.Utility.Deserialize(Byte[][] buffers, Boolean checkTypeToLoad, Object context)
   at Microsoft.ApplicationServer.Caching.Utility.Deserialize(Byte[][] buffers, Boolean checkTypeToLoad)
   at Microsoft.ApplicationServer.Caching.CacheEnumerator.MoveNext()

我看到unable to read azure cached data from a different application并添加了对我的其他项目的引用，该项目包含序列化之前这些对象的类（我实际上只想查看值，因为它们被序列化并存储在缓存中），但是一个人没有改变什么。

Answer 1

会话项目使用Microsoft.Web.DistributedCache.SerializableSessionStateStoreData存储在AppFabric Cache中。

这是反映的代码

[DataContract]
internal sealed class SerializableSessionStateStoreData
{
    [DataMember(Name = "Keys")]
    private string[] _keys;
    [DataMember(Name = "Values")]
    private object[] _values;
    [DataMember(Name = "Timeout")]
    private int _timeout;
    [DataMember(Name = "SessionStateActions")]
    private SessionStateActions _sessionStateActions;
    public SerializableSessionStateStoreData(SessionStateStoreData storeData, SessionStateActions sessionStateActions)
    {
        ...
    }
    public Tuple<SessionStateStoreData, SessionStateActions> Restore()
    {
        ...
    }
}

当您尝试在Web上下文之外获取会话项时，AppFabric缓存客户端无法反序列化数据项，因为它是以未知类型（在Microsoft.Web.DistributedCache.dll中定义）序列化的。

添加对 Microsoft.Web.DistributedCache.dll

的引用

这也需要System.Web.dll，因为它需要System.Web.SessionState.SessionStateStoreData

读取AppFabric内容会引发程序集异常

1 个答案: