Visual Basic (Declaration) | |
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Public Shared Property DefaultValueFunction As Func(Of Type,Object) |
Visual Basic (Usage) | ![]() |
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Dim value As Func(Of Type,Object) EntityMetadata.DefaultValueFunction = value value = EntityMetadata.DefaultValueFunction |
C# | |
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public static Func<Type,object> DefaultValueFunction {get; set;} |
C++/CLI | |
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public: static property Func<Type^,Object^>^ DefaultValueFunction { Func<Type^,Object^>^ get(); void set ( Func<Type^,Object^>^ value); } |
C# | ![]() |
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// To override the default value used for some property types. // Here, DateTime properties default to Today with an Unspecified Kind, and // longs to -1; all other types will use the DevForce-provided default value. EntityMetadata.DefaultValueFunction = (t) => { if (t == typeof(DateTime)) { return DateTime.SpecifyKind(DateTime.Today, DateTimeKind.Unspecified); } if (t == typeof(long)) { return -1L; } return EntityMetadata.DevForceDefaultValueFunction(t); }; |
Use the DefaultValueFunction to override how DevForce determines the default value for a IdeaBlade.EntityModel.DataEntityProperty. If you do not specify an override, the value returned by DevForceDefaultValueFunction is used. Note that the override is not on an Entity basis - the override will apply to all Entity types. For example, you may want to override the default DateTime value with your own code - this override would apply to DateTime data entity properties in all Entity types.
You must set your override for the DefaultValueFunction as early as possible in your processing. The DataEntityProperties of your entities are static fields of these entities, and will be initialized as the entity types are referenced.
Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family