DataAnnotations命名空间中的枚举值是否有现成的验证器? [英] Is there out-of-the box validator for Enum values in DataAnnotations namespace?
问题描述
C#枚举值不仅限于其定义中列出的值,还可以存储其基本类型的任何值。如果基本类型没有定义为 Int32
或简单地 int
。
我正在开发一个WCF serivice,它需要确定一些枚举的值分配给所有枚举值的默认值。我从单元测试开始,以确定是否 [必需]
将在这里做正确的工作。
using System.ComponentModel.DataAnnotations;
使用Xunit;
public enum MyEnum
{
//我始终从1开始,以将默认值的第一个值与
First = 1,
Second ,
}
public class Entity
{
[必需]
public MyEnum EnumValue {get;组;
public class EntityValidationTests
{
[Fact]
public void TestValidEnumValue()
{
实体实体=新实体{EnumValue = MyEnum.First};
Validator.ValidateObject(entity,new ValidationContext(entity,null,null));
}
[事实]
public void TestInvalidEnumValue()
{
实体实体=新实体{EnumValue =(MyEnum)( - 126)} ;
// -126存储在entity.EnumValue属性
Assert.Throws< ValidationException>(()=>
Validator.ValidateObject(entity,new ValidationContext ,null,null)));
}
}
没有,第二个测试不会抛出任何我的问题是:有一个验证器属性来检查提供的值是否在 Enum.GetValues
中?
更新。
确保使用最后一个参数等于 True
的 ValidateObject(Object,ValidationContext,Boolean)
p>有 EnumDataType 在.NET4 + ...
确保您设置第三个参数 validateAllProperties = true
从您的示例中调用 ValidateObject
public class Entity
{
[EnumDataType(typeof(MyEnum))]
public MyEnum EnumValue {get;组;
[事实]
public void TestInvalidEnumValue()
{
实体实体=新实体{EnumValue =(MyEnum)( - 126) };
// -126存储在entity.EnumValue属性
Assert.Throws< ValidationException>(()=>
Validator.ValidateObject(entity,new ValidationContext ,null,null),true));
}
C# enum values are not limited to only values listed in it's definition and may store any value of it's base type. If base type is not defined than Int32
or simply int
is used.
I am developing a WCF serivice which needs to be confident that some enum has a value assigned as opposed to the default value for all enums of 0. I start with a unit test to find out whether [Required]
would do right job here.
using System.ComponentModel.DataAnnotations;
using Xunit;
public enum MyEnum
{
// I always start from 1 in order to distinct first value from the default value
First = 1,
Second,
}
public class Entity
{
[Required]
public MyEnum EnumValue { get; set; }
}
public class EntityValidationTests
{
[Fact]
public void TestValidEnumValue()
{
Entity entity = new Entity { EnumValue = MyEnum.First };
Validator.ValidateObject(entity, new ValidationContext(entity, null, null));
}
[Fact]
public void TestInvalidEnumValue()
{
Entity entity = new Entity { EnumValue = (MyEnum)(-126) };
// -126 is stored in the entity.EnumValue property
Assert.Throws<ValidationException>(() =>
Validator.ValidateObject(entity, new ValidationContext(entity, null, null)));
}
}
It does not, the second test does not throw any exception.
My question is: is there a validator attribute to check that supplied value is in Enum.GetValues
?
Update.
Make sure to use the ValidateObject(Object, ValidationContext, Boolean)
with last parameter equal to True
instead of ValidateObject(Object, ValidationContext)
as done in my unit test.
There's EnumDataType in .NET4+ ...
Make sure you set the 3rd parameter, validateAllProperties=true
in the call to ValidateObject
so from your example:
public class Entity
{
[EnumDataType(typeof(MyEnum))]
public MyEnum EnumValue { get; set; }
}
[Fact]
public void TestInvalidEnumValue()
{
Entity entity = new Entity { EnumValue = (MyEnum)(-126) };
// -126 is stored in the entity.EnumValue property
Assert.Throws<ValidationException>(() =>
Validator.ValidateObject(entity, new ValidationContext(entity, null, null), true));
}
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