Entity Framework 4 and WCF

Entity Framework 4 and WCF

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  Entity Framework 4& WCF So Happy Together Julie Lermanwww.thedatafarm.comjlerman@thedatafarm.comtwitter @JulieLermanVTJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  Julie LermanwebsitetheDataFarm.comblog &twittertheDataFarm.com/blog@julielermanVTbook web siteLearnEntityFramework.comconsultant/mentorMicrosoft MVP, INETA Speaker,ASPInsider, MCP, VTdotNET LeaderJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]2nd EditionSpring 2010
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  AgendaNew Features inEF that help with n-TierPOCO SupportForeign KeysState methodsSerialization improvement Custom WCF ServicesSelf-Tracking EntitiesJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  EFv1 and N-TierEntityObjectsare ugly when serializedTransferring to & from DTOs is painfulNo change-tracking in the objectsDifficult & unsatisfying WCF patterns Julie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  ObjectContext Manages EntitiesJulieLerman: Entity Framework 4 and WCF [ESDC March 2010]ObjectContextPerson ObjectState infoState infoOrder ObjectState infoDetail ObjectState infoDetail ObjectState infoOrder ObjectState infoDetail ObjectState infoDetail Object
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  Hello POCO, GoodbyeEntityObjectJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  Code Gen POCOsfrom ModelT4More in Kathleen Dollard’s 2:30 talk, Wednesday:T4: Code Generation Microsoft StyleText Template Transformation ToolkitJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  New State MethodsSupport N-TierFix up newly attached entity’s EntityStateApplyCurrentValuesApplyOriginalValuesChangeStateChangeRelationshipStateUsed when there are no foreign keysJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  Context.ApplyCurrentValuesJulie Lerman: EntityFramework 4 and WCF [ESDC March 2010]Server EntityManaged by Context
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  EntityState=UnchangedClient side EntityEntityState=ModifiedApplyCurrentValues(ClientEntity)
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  Foreign Key SupportDefaultwith new modelsSimplifies relationship managementHuge benefits from WCF client to serviceJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  Basic Pattern forWCF in EF4Use POCO entity classesNo dynamic proxies (not virtual)Include a State property in the classesReturn graphsAttach returned data to new contextFix up context state using POCO StateIf not using FKsFix up relationships with help from DB dataJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  Self-Tracking Entities (!very agile)For DataSet loversSpecial T4 Code Gen TemplateCreates POCO Classes with state infoCreates additional classes & interfaces“Magically: takes care of change trackingUsed in client (.NET 4.0) & serviceFor WCF/DataContract SerializationJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  SummaryWCF was painfulin EF version 1Many improvements in EF4 to help n-TierWriting custom WCF gets much easierSelf-Tracking Entities are an out of the box solution to help DataSetdevsDon’t forget about WCF Data Services and WCF RIA Services as wellJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]
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  Julie LermanwebsitetheDataFarm.comblog &twittertheDataFarm.com/blog@julielermanVTbook web siteLearnEntityFramework.comconsultant/mentorMicrosoft MVP, INETA Speaker,ASPInsider, MCP, VTdotNET LeaderJulie Lerman: Entity Framework 4 and WCF [ESDC March 2010]2nd EditionSpring 2010
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  ResourcesJulie Lerman: EntityFramework 4 and WCF [ESDC March 2010]