Adding [DataMember] [DataContract] attributes in Entity Framework POCO Template

I would like some help adding in a POCO .tt Entity Framework template Attributes to support WCF serialization and if its possible how to add namespace usings to each entity.

Thank you.

Answers


You need to open your model1.tt file (or whatever it's called in your project), and add a few things.

Locate these lines of code (line 34, in my case):

// Emit Entity Types
foreach (EntityType entity in ItemCollection.GetItems<EntityType>().OrderBy(e => e.Name))
{
    fileManager.StartNewFile(entity.Name + ".cs");

Just before this line here:

<#=Accessibility.ForType(entity)#> <#=code.SpaceAfter(code.AbstractOption(entity))#>partial class <#=code.Escape(entity)#><#=code.StringBefore(" : ", code.Escape(entity.BaseType))#>

you need to add the [DataContract] attribute:

[DataContract]
<#=Accessibility.ForType(entity)#> <#=code.SpaceAfter(code.AbstractOption(entity))#>partial class <#=code.Escape(entity)#><#=code.StringBefore(" : ", code.Escape(entity.BaseType))#>

to your template.

Next, locate this line of code:

<#=PropertyVirtualModifier(Accessibility.ForProperty(edmProperty))#> <#=code.Escape(edmProperty.TypeUsage)#> <#=code.Escape(edmProperty)#>

Before that line, add the [DataMember] attribute to your template:

[DataMember]
<#=PropertyVirtualModifier(Accessibility.ForProperty(edmProperty))#> <#=code.Escape(edmProperty.TypeUsage)#> <#=code.Escape(edmProperty)#>

This will add those attributes for all entities and all properties - that might not be what you really want, but it's a start.

Also: to finish off, you probably want to have a look at the WriteHeader function in your T4 template, and add the using System.Runtime.Serialization; statement to your list of usings:

using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Runtime.Serialization;  // add this to handle DataContract/DataMember

In EF6.1 you need to edit the model1.tt and add tag between UsingDirectives and EntityClassOpening:

<#=codeStringGenerator.UsingDirectives(inHeader: false)#>
//MY TAG:
[Serializable]
<#=codeStringGenerator.EntityClassOpening(entity)#>

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