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asp.net-mvcdata-annotations

Required attribute for an integer value

I have a viewmodel with an Id property

[Required]
public int Id { get; set; }

But I think this attribute is working only for string properties.

When no Id is set, Id has value 0 and the model is valid.

How can I enforce that if no value for a int property is set, the model will be invalid ?

Solution

  • Change the type to Nullable<int> (shortcut int?) to allow null values.