我有下一个（简化的）视图模型：
public class RegisterModel
{
public string UserName { get; set; }
[MustExistIf("SomeProperty", "some value", "SomeOtherProperty", ErrorMessage = "You have to select something")]
public string LastName { get; set; }
public AddressModel Address { get; set; }
}
public class AddressModel
{
public string Street { get; set; }
public string House { get; set; }
}
我有自定义验证器
public class MustExistIfAttribute : ValidationAttribute, IClientValidatable
{
private string _masterName { get; set; }
private object _masterValue { get; set; }
private string _dependantName { get; set; }
public MustExistIfAttribute(string masterName, object masterValue, string dependantName)
{
this._masterName = masterName;
this._masterValue = masterValue;
this._dependantName = dependantName;
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
// get value of master property
var masValue = _getValue(validationContext.ObjectInstance, _masterName);
// get value of property whch depends on master property
var depValue = _getValue(validationContext.ObjectInstance, _dependantName);
if (masValue.Equals(_masterValue)) // if value in request is equal to value in specified in data annotation
{
if (depValue == null) // if dependant value does not exist
{
return new ValidationResult(FormatErrorMessage(validationContext.DisplayName));
}
}
return ValidationResult.Success;
}
public override bool IsValid(object value)
{
return base.IsValid(value);
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var modelClientValidationRule = new ModelClientValidationRule
{
ValidationType = "mustexistif",
ErrorMessage = FormatErrorMessage(metadata.DisplayName)
};
modelClientValidationRule.ValidationParameters.Add("mastername", this._masterName);
modelClientValidationRule.ValidationParameters.Add("mastervalue", this._masterValue);
modelClientValidationRule.ValidationParameters.Add("dependantname", this._dependantName);
yield return modelClientValidationRule;
}
private static object _getValue(object objectInstance, string propertyName)
{
...
}
}
我有下一个 javascript（请忽略在 mustexitif 方法中返回 false - 它仅用于测试目的）
(function () {
jQuery.validator.addMethod('mustexistif', function (value, element, params) {
var masterName = params['mastername'];
var masterValue = params['mastervalue'];
var dependantName = params['dependantname'];
return false;
});
var setValidationValues = function (options, ruleName, value) {
options.rules[ruleName] = value;
if (options.message) {
options.messages[ruleName] = options.message;
}
};
var $Unob = $.validator.unobtrusive;
$Unob.adapters.add("mustexistif", ["mastername", "mastervalue", "dependantname"], function (options) {
var value = {
mastername: options.params.mastername,
mastervalue: options.params.mastervalue,
dependantname: options.params.dependantname
};
setValidationValues(options, "mustexistif", value);
});
})();
当我使用 MustExistIf 注释装饰 RegisterModel 类的 LastName 属性时，它按预期工作（如在提供的代码中）。但我真正想要的是用 MustExistIf 注释装饰 RegisterModel 的复杂 Address 属性。问题是，当我这样做时，没有注册不显眼的适配器（这样做的 JavaScript 不会被触发）。所以，当我装饰简单和复杂的属性时是有区别的。我的解决方案不允许我装饰 Address 类的属性（仅供参考，我尝试过，然后验证工作正常）。有没有办法实现我的意图？我错过了什么吗？解决方案是在模型级别进行验证吗？但是，是否可以进行客户端验证？