Question

大家好！我很混淆实现一段代码来在asp.net mvc 3中创建工作.net数据注释，在几种情况下使用具有不同必需字段的模型（6）。我有一个模特：

  public class OpportunityModel
{
    public Guid OpportunityId { get; set; }

    [Display(Name = "Value")]
    [RegularExpression(@"^[-+]?\d{1,10}(\.\d{0,4})?$", ErrorMessage = "Must be a number")]
    public decimal? ActualValue { get; set; }  

    [Display(Name = "Name")]
    [Required(ErrorMessage = "Name is required")]
    public string Name { get; set; } 
    public string Product { get; set; } 

    [Display(Name = "Estimated Date")]
    public DateTime? EstimateDate { get; set; }


    public bool? Sales6ixFallDown { get; set; }


    [Display(Name = "Stage")]
    public Stages Sales6ixStage { get; set; }

    public DateTime? Sales6ixDateInBoard { get; set; }

    public DateTime? Sales6ixDateInCurrentStage { get; set; }

    public DateTime? Sales6ixNextAppointmentDate { get; set; }

    [Display(Name = "Description")]
    public string Description { get; set; }

    public string Sales6ixNextAppointmentDescription { get; set; }

    public int NewColumn { get; set; }

    public Guid? CustomerId { get; set; }

    public string CustomerName { get; set; }
}

我需要的是动态改变其中所需的封地的可能性。经过一些谷歌搜索，这是不可能的，并开始使用模型继承。我的意思是：我有一个像这样的基础模型：

  public class BaseOpportunityModel
{
    public Guid OpportunityId { get; set; }

    public virtual decimal? ActualValue { get; set; }  
    public virtual string Name { get; set; }  

    public string Product { get; set; } 

    public DateTime? EstimateDate { get; set; }

    public bool? Sales6ixFallDown { get; set; }


    [Display(Name = "Stage")]
    public Stages Sales6ixStage { get; set; }

    public DateTime? Sales6ixDateInBoard { get; set; }

    public DateTime? Sales6ixDateInCurrentStage { get; set; }

    public DateTime? Sales6ixNextAppointmentDate { get; set; }

    [Display(Name = "Description")]
    public string Description { get; set; }

    public string Sales6ixNextAppointmentDescription { get; set; }

    public int NewColumn { get; set; }

    public Guid? CustomerId { get; set; }

    public string CustomerName { get; set; }
}

其中虚拟属性是可能是必填字段的属性。然后我从这个基地得到了几个派生模型：

  public class OpportunityModel0: BaseOpportunityModel
{
    [Display(Name = "Value")]
    [Required(ErrorMessage = "Name is required")]
    [RegularExpression(@"^[-+]?\d{1,10}(\.\d{0,4})?$", ErrorMessage = "Must be a number")]
    public override decimal? ActualValue { get; set; }  

    [Display(Name = "Name")]
    [Required(ErrorMessage = "Name is required")]
 public override string Name { get; set; }

}

然后我就可以在View和Controller基础模型BaseOpportunityModel中使用了。但我遇到了以下问题：

验证使用BaseOpportunityModel中的注释属性并忽略派生模型中的属性。

我错了什么？有人能引导我朝着正确的方向前进吗？还是帮我解决这个问题？提前谢谢。

Answer 1

此提示应在mvc 3中适用于THIS。可能有问题的一件事是你的后期行动。您应该在后期操作中将继承的模型指定为param。

public ActionResult MyPostAction(OpportunityModel0 model)

如果基本模型是参数，则验证将无效。

Answer 2

我通过使用自定义RequiredIfValidator来解决模型的不同重新验证问题。所以现在我只有一个模型和一个视图。这是代码，可能是某些人发现它很有用：

的 RequiredIfAttribute：

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.ComponentModel.DataAnnotations; using System.Web.Mvc; namespace Infrastructure.Extensions { public class RequiredIfAttribute : ValidationAttribute, IClientValidatable { private RequiredAttribute _innerAttribute = new RequiredAttribute(); public string DependentProperty { get; set; } public object TargetValue { get; set; } public RequiredIfAttribute(string dependentProperty, object targetValue) { this.DependentProperty = dependentProperty; this.TargetValue = targetValue; } protected override ValidationResult IsValid(object value, ValidationContext validationContext) { // get a reference to the property this validation depends upon var containerType = validationContext.ObjectInstance.GetType(); var field = containerType.GetProperty(this.DependentProperty); if (field != null) { // get the value of the dependent property var dependentvalue = field.GetValue(validationContext.ObjectInstance, null); // compare the value against the target value if ((dependentvalue == null && this.TargetValue == null) || (dependentvalue != null && dependentvalue.Equals(this.TargetValue))) { // match => means we should try validating this field if (!_innerAttribute.IsValid(value)) // validation failed - return an error return new ValidationResult(this.ErrorMessage, new[] { validationContext.MemberName }); } } return ValidationResult.Success; } public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context) { var rule = new ModelClientValidationRule() { ErrorMessage = FormatErrorMessage(metadata.GetDisplayName()), ValidationType = "requiredif", }; string depProp = BuildDependentPropertyId(metadata, context as ViewContext); // find the value on the control we depend on; // if it's a bool, format it javascript style // (the default is True or False!) string targetValue = (this.TargetValue ?? "").ToString(); if (this.TargetValue.GetType() == typeof(bool)) targetValue = targetValue.ToLower(); rule.ValidationParameters.Add("dependentproperty", depProp); rule.ValidationParameters.Add("targetvalue", targetValue); yield return rule; } private string BuildDependentPropertyId(ModelMetadata metadata, ViewContext viewContext) { // build the ID of the property string depProp = viewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(this.DependentProperty); // unfortunately this will have the name of the current field appended to the beginning, // because the TemplateInfo's context has had this fieldname appended to it. Instead, we // want to get the context as though it was one level higher (i.e. outside the current property, // which is the containing object (our Person), and hence the same level as the dependent property. var thisField = metadata.PropertyName + "_"; if (depProp.StartsWith(thisField)) // strip it off again depProp = depProp.Substring(thisField.Length); return depProp; } } }

的 RequiredIfValidator

namespace Infrastructure.Extensions { public class RequiredIfValidator : DataAnnotationsModelValidator<RequiredIfAttribute> { public RequiredIfValidator(ModelMetadata metadata, ControllerContext context, RequiredIfAttribute attribute) : base(metadata, context, attribute) { } public override IEnumerable<ModelClientValidationRule> GetClientValidationRules() { return base.GetClientValidationRules(); } public override IEnumerable<ModelValidationResult> Validate(object container) { // get a reference to the property this validation depends upon var field = Metadata.ContainerType.GetProperty(Attribute.DependentProperty); if (field != null) { // get the value of the dependent property var value = field.GetValue(container, null); // compare the value against the target value if ((value == null && Attribute.TargetValue == null) || (value.Equals(Attribute.TargetValue))) { // match => means we should try validating this field if (!Attribute.IsValid(Metadata.Model)) // validation failed - return an error yield return new ModelValidationResult { Message = ErrorMessage }; } } } } }

客户端验证

/// <reference path="jquery-1.4.4-vsdoc.js" /> /// <reference path="jquery.validate.unobtrusive.js" /> $.validator.addMethod('requiredif', function (value, element, parameters) { var id = '#' + parameters['dependentproperty']; // get the target value (as a string, // as that's what actual value will be) var targetvalue = parameters['targetvalue']; targetvalue = (targetvalue == null ? '' : targetvalue).toString(); // get the actual value of the target control // note - this probably needs to cater for more // control types, e.g. radios var control = $(id); var controltype = control.attr('type'); var actualvalue = controltype === 'checkbox' ? control.is(":checked").toString() : //control.attr('checked').toString() : control.val(); actualvalue = actualvalue.toLocaleLowerCase(); // if the condition is true, reuse the existing // required field validator functionality if (targetvalue === actualvalue) return $.validator.methods.required.call( this, value, element, parameters); return true; } ); $.validator.unobtrusive.adapters.add( 'requiredif', ['dependentproperty', 'targetvalue'], function (options) { options.rules['requiredif'] = { dependentproperty: options.params['dependentproperty'], targetvalue: options.params['targetvalue'] }; options.messages['requiredif'] = options.message; });

.Net数据注释和模型层次结构

2 个答案: