Custom Data Annotations ( DataType )

Question

Is it possible to add new datatypes to the existing DataAnnotations (I'm not looking for a validator but a raw data type). For example

Currnetly you have

[DataType(DataType.Html)]
public string Footer {get; set;}

And into the mix you can add ~Views/Shared/EditorTemplates/Html.cshtml

I'd like to be able to add [DataType(DataType.CSS)] I know in theory I could use a UIHint for adding a specific view, but if possible I'd like to do it at an even earlier stage and specify the datatype rather than relying on UI Hints.

Any pointers would be greatly appreciated. A Quick search of S.O seems a lot of answers around Custom meta-data types, custom validators, and multiple datatyps but I can't seem to find one for adding a new core data-type.

Martin Devillers · Accepted Answer · 2012-08-12 14:48:40Z

5

DataType has a second constructor that takes a string. However, internally, this is actually the same as using the UIHint attribute.

Adding a new core DataType is not possible since the DataType enumeration is part of the .NET framework. The closest thing you can do is to create a new class that inherits from the DataTypeAttribute. Then you can add a new constructor with your own DataType enumeration.

public NewDataTypeAttribute(DataType dataType) : base(dataType) { }

public NewDataTypeAttribute(NewDataType newDataType) : base (newDataType.ToString()) { }

answered Aug 12, 2012 at 14:48

Martin Devillers

18.1k7 gold badges51 silver badges93 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sergei Rogovtcev · Accepted Answer · 2012-08-12 14:24:08Z

2

Yes, you can. DataTypeAttribute has a constructor that accepts string.

answered Aug 12, 2012 at 14:24

Sergei Rogovtcev

5,8302 gold badges24 silver badges35 bronze badges

Collectives™ on Stack Overflow

Custom Data Annotations ( DataType )

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related