为了获得客户端验证,您需要传递“其他属性”的值ModelClientValidationRule
通过使用.Add()
规则方法ValidationParameters
属性,然后编写客户端脚本以将规则添加到$.validator
.
但首先,您的属性还需要解决一些其他问题。首先你应该执行你的foreach
仅当您应用该属性的属性值为null
。其次,返回一个ValidationResult
如果“其他属性”之一不存在,对用户来说会令人困惑且毫无意义,您应该忽略它。
属性代码应该是(注意我更改了属性的名称)
public class RequiredIfAnyAttribute : ValidationAttribute, IClientValidatable
{
private readonly string[] _otherProperties;
private const string _DefaultErrorMessage = "The {0} field is required";
public RequiredIfAnyAttribute(params string[] otherProperties)
{
if (otherProperties.Length == 0) // would not make sense
{
throw new ArgumentException("At least one other property name must be provided");
}
_otherProperties = otherProperties;
ErrorMessage = _DefaultErrorMessage;
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (value == null) // no point checking if it has a value
{
foreach (string property in _otherProperties)
{
var propertyName = validationContext.ObjectType.GetProperty(property);
if (propertyName == null)
{
continue;
}
var propertyValue = propertyName.GetValue(validationContext.ObjectInstance, null);
if (propertyValue != null)
{
return new ValidationResult(FormatErrorMessage(validationContext.DisplayName));
}
}
}
return ValidationResult.Success;
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule
{
ValidationType = "requiredifany",
ErrorMessage = FormatErrorMessage(metadata.GetDisplayName()),
};
/ pass a comma separated list of the other propeties
rule.ValidationParameters.Add("otherproperties", string.Join(",", _otherProperties));
yield return rule;
}
}
然后脚本将是
sandtrapValidation = {
getDependentElement: function (validationElement, dependentProperty) {
var dependentElement = $('#' + dependentProperty);
if (dependentElement.length === 1) {
return dependentElement;
}
var name = validationElement.name;
var index = name.lastIndexOf(".") + 1;
var id = (name.substr(0, index) + dependentProperty).replace(/[\.\[\]]/g, "_");
dependentElement = $('#' + id);
if (dependentElement.length === 1) {
return dependentElement;
}
// Try using the name attribute
name = (name.substr(0, index) + dependentProperty);
dependentElement = $('[name="' + name + '"]');
if (dependentElement.length > 0) {
return dependentElement.first();
}
return null;
}
}
$.validator.unobtrusive.adapters.add("requiredifany", ["otherproperties"], function (options) {
var element = options.element;
var otherNames = options.params.otherproperties.split(',');
var otherProperties = [];
$.each(otherNames, function (index, item) {
otherProperties.push(sandtrapValidation.getDependentElement(element, item))
});
options.rules['requiredifany'] = {
otherproperties: otherProperties
};
options.messages['requiredifany'] = options.message;
});
$.validator.addMethod("requiredifany", function (value, element, params) {
if ($(element).val() != '') {
// The element has a value so its OK
return true;
}
var isValid = true;
$.each(params.otherproperties, function (index, item) {
if ($(this).val() != '') {
isValid = false;
}
});
return isValid;
});