无法显示具有自定义验证属性的ErrorMessageResourceName
我已经基于这个问题来创建一个自定义验证属性与asp.net mvc3和jquery验证:
我已经更新它来处理一组字符串属性而不是bool。 哪些工作正常。 但我的问题来了,当我用它与自定义ErrorMessage自定义消息不显示。 我无法弄清楚为什么。
[RequiredOneFromGroup("PhoneGroup",
ErrorMessageResourceName = "PhoneGroup",
ErrorMessageResourceType = typeof(WizardStrings))]
public String Mobile { get; set; }
[RequiredOneFromGroup("PhoneGroup",
ErrorMessageResourceName = "PhoneGroup",
ErrorMessageResourceType = typeof(WizardStrings))]
public String Phone { get; set; }
以下是自定义验证属性:
[AttributeUsage(AttributeTargets.Property)]
public class RequiredOneFromGroup : ValidationAttribute, IClientValidatable
{
public RequiredOneFromGroup(string groupName)
{
ErrorMessage = string.Format("You must select at least one value from group "{0}"", groupName);
GroupName = groupName;
}
public string GroupName { get; private set; }
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
foreach (var property in GetGroupProperties(validationContext.ObjectType))
{
var propertyValue = (string)property.GetValue(validationContext.ObjectInstance, null);
if ( ! string.IsNullOrWhiteSpace(propertyValue))
{
// at least one property is true in this group => the model is valid
return null;
}
}
return new ValidationResult(FormatErrorMessage(validationContext.DisplayName));
}
private IEnumerable<PropertyInfo> GetGroupProperties(Type type)
{
return
from property in type.GetProperties()
where property.PropertyType == typeof(string)
let attributes = property.GetCustomAttributes(typeof(RequiredOneFromGroup), false).OfType<RequiredOneFromGroup>()
where attributes.Count() > 0
from attribute in attributes
where attribute.GroupName == GroupName
select property;
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var groupProperties = GetGroupProperties(metadata.ContainerType).Select(p => p.Name);
var rule = new ModelClientValidationRule
{
ErrorMessage = this.ErrorMessage
};
rule.ValidationType = string.Format("group", GroupName.ToLower());
rule.ValidationParameters["propertynames"] = string.Join(",", groupProperties);
yield return rule;
}
}
我试图删除ErrorMessage的手动设置,但然后我会得到一个空的错误消息。 我如何检索我在模型的命名参数中指定的ErrorMessageResourceName的值? 我怎样才能设置它,使自定义验证属性显示它?
在您的GetClientValidationRules
方法中,替换:
var rule = new ModelClientValidationRule
{
ErrorMessage = this.ErrorMessage
};
有:
var rule = new ModelClientValidationRule
{
ErrorMessage = FormatErrorMessage(metadata.DisplayName)
};
同时在你的构造函数中摆脱this.ErrorMessage = ...
行。 您不能同时设置ErrorMessage和使用验证属性的ErrorMessageResourceName
和ErrorMessageResourceType
属性。 这些东西是相互排斥的。
好吧,我在想,不知何故,因为自定义验证属性继承自ValidationAttribute,ErrorMessage处理将自然完成。 这似乎并非如此。
我已经解决了这个问题,如下所示:
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var groupProperties = GetGroupProperties(metadata.ContainerType).Select(p => p.Name);
var rule = new ModelClientValidationRule
{
// Replaced ErrorMessage with ErrorMessageString which
// will hold string value of ErrorMessageResourceName if there is
ErrorMessage = this.ErrorMessageString
};
rule.ValidationType = string.Format("group", GroupName.ToLower());
rule.ValidationParameters["propertynames"] = string.Join(",", groupProperties);
yield return rule;
}
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