在收集屬性上創建定製驗證器的問題

用於開發的Net MVC 3。現在有一個場景，我需要創建一個集合屬性上的自定義驗證器。現在我面臨的問題是，這個自定義驗證程序工作得很好，當集合的長度爲1但是當集合中有多個元素時，我面臨的一個問題是自定義驗證推送錯誤，但是在檢查時發生問題在ModelState中找不到錯誤。所以在這種情況下我應該怎麼做？我正在粘貼代碼如下。在收集屬性上創建定製驗證器的問題

這是我想驗證模型：

public class CreateTestModel 
{ 
    [Required] 
    public string Name { get; set; } 

    public string Description { get; set; } 

    public RadioButtonListViewModel<GoalTypes> Goals { get; set; } 

    [MinimumRequired("IncludedEntities", "ExcludedEntities", 1, ErrorMessage = "1 Entity is compulsory")] 
    public IEnumerable<TestEntityModel> IncludedEntities { get; set; } 

    public IEnumerable<TestEntityModel> ExcludedEntities { get; set; } 

    public IEnumerable<TestFilterModel> IncludedFilters { get; set; } 

    public IEnumerable<TestFilterModel> ExcludedFilters { get; set; } 

    public IEnumerable<BucketModel> Buckets { get; set; } 

    public bool AutoDecision { get; set; } 

    public DateTime StartDate { get; set; } 

    public DateTime EndDate { get; set; } 

    public int AdminId { get; set; } 

    [DefaultValue(true)] 
    public bool IsEnabled { get; set; } 
    }

自定義驗證的目的： - 我需要驗證一個集合中需要實體的最小數量。有些情況下，例如在這種情況下：IncludedEntities和ExcludedEntities需要包含兩個屬性的最小值爲1，這是我的業務規則。爲此，編寫了下面的定製校驗器。

這是自定義驗證我已經寫：

[AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = true)] 
public class MinimumRequired : ValidationAttribute,IClientValidatable 
{ 
    public int numberOfMandatoryEntities{get; private set;} 
    public int totalCountofIncludeEntities { get; private set; } 
    public bool isBucket { get; set; } 
    public string Property1{get; private set;} 
    public string Property2{ get; private set; } 
    private const string DefaultErrorMessageFormatString = "Atleast one entity is required"; 

    public MinimumRequired(string Property1, string Property2, int MandatoryCount) 
    { 
     this.Property1 = Property1; 
     if (!String.IsNullOrEmpty(Property2)) 
      this.Property2 = Property2; 
     numberOfMandatoryEntities = MandatoryCount; 
    } 


    public override string FormatErrorMessage(string name) 
    { 
     return string.Format(ErrorMessageString, name); 
    } 

    protected override ValidationResult IsValid(object value, ValidationContext validationContext) 
    { 
     object property2Value = null; 
     object property1Value = null; 
     int property1Count=0; 
     if(!String.IsNullOrEmpty(Property2)) 
     property2Value = validationContext.ObjectInstance.GetType().GetProperty(Property2).GetValue(validationContext.ObjectInstance, null); 
     property1Value = validationContext.ObjectInstance.GetType().GetProperty(Property1).GetValue(validationContext.ObjectInstance, null); 
     if (property1Value != null) 
     { 
     property1Count = ((IEnumerable<Object>)property1Value).Count(); 
     } 

     if (property2Value != null) 
     { 
      property1Count = property1Count + ((IEnumerable<Object>)property2Value).Count(); 
     } 
     if (property1Count < numberOfMandatoryEntities) 
     { 
      return new ValidationResult(ErrorMessage); 
     } 

     return ValidationResult.Success; 
    } 
    #region IClientValidatable Members 

    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context) 
    { 
     var x = new ModelClientValidationRule(); 
     x.ValidationType = "entityvalidator"; 
     x.ErrorMessage = string.Format(ErrorMessageString, metadata.GetDisplayName()); 
     x.ValidationParameters.Add("mandatoryentity", numberOfMandatoryEntities); 
     return new[] 
     { 
      x 
     }; 
    } 

    #endregion 



}

請幫我...

來源

2011-08-09 bhuvin

我triend它完美對我上面的代碼。

來源

2012-01-03 11:12:24 Vipresh

在收集屬性上創建定製驗證器的問題

回答

相關問題