In the view state to save custom objects

Background:
B / S three-tier structure of the system, the performance level in the instance of business object layer, and use this object to the implementation of business rules, access the data layer.

Question:
In the performance of a business object instance, this object was found in the operation that it can not be added to the ViewState, the prompt error:

Type "AmmeterChg" must be marked as Serializable or have ReferenceConverter outside the TypeConverter, in order to be placed in view state.

Solution:

By class implements ISerialization interface, it can be serialized

Implement the interface part of the code is as follows:


# Region ISerializable Members

protected ammeterChg (SerializationInfo info, StreamingContext context)
(
this.customer_id = info.GetString ("customer_id");
this.am_id_old = info.GetString ("am_id_old");
this.abc = info.GetString ("abc");
this.ycbds_old = info.GetDouble ("ycbds_old");
)

public void GetObjectData (System.Runtime.Serialization.SerializationInfo info,

System.Runtime.Serialization.StreamingContext context)
(

info.AddValue ("customer_id", customer_id);
info.AddValue ("am_id_old", am_id_old);
info.AddValue ("abc", abc);
info.AddValue ("ycbds_old", ycbds_old);
)
# Endregion

================================================== =========
customer_id, am_id_old, ycbds_old is private property class variables!








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