Asp.net mvc 3 实现RequiredIf和RequiredIfNot属性验证器,这取决于两个值
我需要实现一个RequiredIF验证器,它依赖于两个值,一个复选框和一个从下拉列表中选择的值。 如果可能的话,我需要Asp.net mvc 3 实现RequiredIf和RequiredIfNot属性验证器,这取决于两个值,asp.net-mvc-3,Asp.net Mvc 3,我需要实现一个RequiredIF验证器,它依赖于两个值,一个复选框和一个从下拉列表中选择的值。 如果可能的话,我需要 [RequiredIf("Property1", true,"Property2,"value", ErrorMessageResourceName = "ReqField", ErrorMessageResourceType = typeof(RegisterUser))] 您必须定制验证器。这是实现这一目标的必经之路。我希望这会有所帮助以下是创建您自己的Require
[RequiredIf("Property1", true,"Property2,"value", ErrorMessageResourceName = "ReqField", ErrorMessageResourceType = typeof(RegisterUser))]
您必须定制验证器。这是实现这一目标的必经之路。我希望这会有所帮助以下是创建您自己的RequiredIf和RequiredIfNot自定义验证器的代码。 如果要检查2个值,只需添加额外代码 RequiredIf
public class RequiredIfAttribute : ValidationAttribute, IClientValidatable
{
private readonly RequiredAttribute _innerAttribute = new RequiredAttribute();
internal string _dependentProperty;
internal object _targetValue;
public RequiredIfAttribute(string dependentProperty, object targetValue)
{
_dependentProperty = dependentProperty;
_targetValue = targetValue;
}
/// <summary>
/// Returns if the given validation result is valid. It checks if the RequiredIfAttribute needs to be validated
/// </summary>
/// <param name="value">Value of the control</param>
/// <param name="validationContext">Validation context</param>
/// <returns></returns>
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
var field = validationContext.ObjectType.GetProperty(_dependentProperty);
if (field != null)
{
var dependentValue = field.GetValue(validationContext.ObjectInstance, null);
if ((dependentValue == null && _targetValue == null) || (dependentValue.ToString() == _targetValue.ToString()))
{
if (!_innerAttribute.IsValid(value))
{
return new ValidationResult(ErrorMessage);
}
}
return ValidationResult.Success;
}
else
{
throw new ValidationException("RequiredIf Dependant Property " + _dependentProperty + " does not exist");
}
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule
{
ErrorMessage = ErrorMessageString,
ValidationType = "requiredif",
};
rule.ValidationParameters["dependentproperty"] = (context as ViewContext).ViewData.TemplateInfo.GetFullHtmlFieldId(_dependentProperty);
rule.ValidationParameters["desiredvalue"] = _targetValue is bool ? _targetValue.ToString().ToLower() : _targetValue;
yield return rule;
}
}
public class RequiredIfNotAttribute : ValidationAttribute, IClientValidatable
{
private readonly RequiredAttribute _innerAttribute = new RequiredAttribute();
internal string _dependentProperty;
internal object _targetValue;
public RequiredIfNotAttribute(string dependentProperty, object targetValue)
{
_dependentProperty = dependentProperty;
_targetValue = targetValue;
}
/// <summary>
/// Returns if the given validation result is valid. It checks if the RequiredIfAttribute needs to be validated
/// </summary>
/// <param name="value">Value of the control</param>
/// <param name="validationContext">Validation context</param>
/// <returns></returns>
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
var field = validationContext.ObjectType.GetProperty(_dependentProperty);
if (field != null)
{
var dependentValue = field.GetValue(validationContext.ObjectInstance, null);
if ((dependentValue == null && _targetValue == null) || (dependentValue.ToString() != _targetValue.ToString()))
{
if (!_innerAttribute.IsValid(value))
{
return new ValidationResult(ErrorMessage);
}
}
return ValidationResult.Success;
}
else
{
throw new ValidationException("RequiredIfNot Dependant Property " + _dependentProperty + " does not exist");
}
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule
{
ErrorMessage = ErrorMessageString,
ValidationType = "requiredifnot",
};
rule.ValidationParameters["dependentproperty"] = (context as ViewContext).ViewData.TemplateInfo.GetFullHtmlFieldId(_dependentProperty);
rule.ValidationParameters["desiredvalue"] = _targetValue is bool ? _targetValue.ToString().ToLower() : _targetValue;
yield return rule;
}
}
[RequiredIf("IsRequired", true, ErrorMessage = "First Name is required.")]