public static SessionState FromJson(string json)
{
if (string.IsNullOrEmpty(json))
{
return(null);
}
try
{
SessionStateItem item = JsonConvert.DeserializeObject <SessionStateItem>(json);
SessionStateItemCollection collections = new SessionStateItemCollection();
SaveValue objectValue = null;
JsonSerializer serializer = new JsonSerializer();
StringReader sr = null;
JsonTextReader tReader = null;
foreach (KeyValuePair <string, SaveValue> kvp in item.Dict)
{
objectValue = kvp.Value as SaveValue;
if (objectValue.Value == null)
{
collections[kvp.Key] = null;
}
else
{
if (!IsValueType(objectValue.Type))
{
sr = new StringReader(objectValue.Value.ToString());
tReader = new JsonTextReader(sr);
collections[kvp.Key] = serializer.Deserialize(tReader, objectValue.Type);
}
else
{
collections[kvp.Key] = objectValue.Value;
}
}
}
return(new SessionState(collections, null, item.Timeout));
}
catch
{
return(null);
}
}
public string ToJson()
{
// 这里忽略_staticObjects这个成员。
if (_sessionItems == null || _sessionItems.Count == 0)
{
return(null);
}
Dictionary <string, SaveValue> dict = new Dictionary <string, SaveValue>(_sessionItems.Count);
NameObjectCollectionBase.KeysCollection keys = _sessionItems.Keys;
string key;
object objectValue = string.Empty;
Type type = null;
for (int i = 0; i < keys.Count; i++)
{
key = keys[i];
objectValue = _sessionItems[key];
if (objectValue != null)
{
type = objectValue.GetType();
}
else
{
type = typeof(object);
}
dict.Add(key, new SaveValue {
Value = objectValue, Type = type
});
}
SessionStateItem item = new SessionStateItem {
Dict = dict, Timeout = this._timeout
};
return(JsonConvert.SerializeObject(item));
}