更新时间:2023-12-02 23:14:28
您应该使用自定义 ModelMetadataValidatorProvider
插入验证器,而不是在模板中添加验证器.首先,创建您的 ModelMetadataProvider 类:
Instead of adding your validator in the template, you should insert your validator using a custom ModelMetadataValidatorProvider
. First, create your ModelMetadataProvider class:
public class MyModelMetadataValidatorProvider : DataAnnotationsModelValidatorProvider
{
internal static DataAnnotationsModelValidationFactory DefaultAttributeFactory = Create;
internal static Dictionary<Type, DataAnnotationsModelValidationFactory> AttributeFactories = new Dictionary<Type, DataAnnotationsModelValidationFactory>() {
{
typeof(RegularExpressionAttribute),
(metadata, context, attribute) => new RegularExpressionAttributeAdapter(metadata, context, (RegularExpressionAttribute)attribute)
}
};
internal static ModelValidator Create(ModelMetadata metadata, ControllerContext context, ValidationAttribute attribute)
{
return new DataAnnotationsModelValidator(metadata, context, attribute);
}
protected override IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ControllerContext context, IEnumerable<Attribute> attributes)
{
List<ModelValidator> vals = base.GetValidators(metadata, context, attributes).ToList();
// inject our new validator
if (metadata.ModelType.Name == "DateTime")
{
DataAnnotationsModelValidationFactory factory;
RegularExpressionAttribute regex = new RegularExpressionAttribute(
"^(((0?[1-9]|1[012])/(0?[1-9]|1\d|2[0-8])|(0?[13456789]|1[012])/(29|30)|(0?[13578]|1[02])/31)/(19|[2-9]\d)\d{2}|0?2/29/((19|[2-9]\d)(0[48]|[2468][048]|[13579][26])|(([2468][048]|[3579][26])00)))$");
regex.ErrorMessage = "Invalid date format";
if (!AttributeFactories.TryGetValue(regex.GetType(), out factory))
factory = DefaultAttributeFactory;
vals.Add(factory(metadata, context, regex));
}
return vals.AsEnumerable();
}
}
接下来,在 Application_Start
的 Global.asax.cs
中注册您的 ModelMetadataValidatorProvider.
Next, register your ModelMetadataValidatorProvider in Global.asax.cs
in Application_Start
.
ModelValidatorProviders.Providers.Clear();
ModelValidatorProviders.Providers.Add(new MyModelMetadataValidatorProvider());
现在,当您访问模型时,一个 RegularExpressionAttribte 将附加到每个 DateTime 字段.您还可以扩展它以提供本地化的 DateTime 正则表达式和消息.
Now, when you access a model, a RegularExpressionAttribte will be attached to each DateTime field. You can also extend this to provide a localized DateTime regular expression and message.
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