efpocoadapter | 易学教程

“Metadata information not found” while using EF4's POCO Template?

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问题 I just installed the POCO Template for EF4. I have a single entity in my model, AnnouncementText , and the T4 files seem to be properly generated. Attempting to access this new entity is throwing the following error when I access the auto-generated property MyObjectContext.AnnouncementTexts : InvalidOperationException: Mapping and metadata information could not be found for EntityType 'MyNamespace.AnnouncementText'. The properties on the AnnouncementText POCO seem to match up with the columns

DataContractSerializer: How to serialize classes/members without DataContract/DataMember attributes

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DataContractSerializer requires classes and members to be marked with the DataContract and DataMember attributes. However, in my case the classes are auto-generated with the EFPocoAdapater framework and these attributes are not present. How can I force serialization of all members using the DataContractSerializer without these attributes being present? From Alexdej: This changed in 3.5SP1, hope you saw that: http://www.pluralsight.com/community/blogs/aaron/archive/2008/05/13/50934.aspx You cannot - plain and simple. The attribute are needed for the DataContractSerializer to pick up which

DataContractSerializer: How to serialize classes/members without DataContract/DataMember attributes

阅读更多关于 DataContractSerializer: How to serialize classes/members without DataContract/DataMember attributes

问题 DataContractSerializer requires classes and members to be marked with the DataContract and DataMember attributes. However, in my case the classes are auto-generated with the EFPocoAdapater framework and these attributes are not present. How can I force serialization of all members using the DataContractSerializer without these attributes being present? From Alexdej: This changed in 3.5SP1, hope you saw that: http://www.pluralsight.com/community/blogs/aaron/archive/2008/05/13/50934.aspx 回答1: