问题陈述：
我使用自定义验证属性RequiredIf来验证MVC-Razor应用中的某些字段。一切都运行正常，但最近我们注意到，应用程序在花了一些时间用于应用程序后花了太多时间来回应。
当联系Microsoft支持团队时，他们建议更改RequiredIf，因为当前正在使应用程序响应缓慢。因此我们使用新的RequiredIf修改了旧RequiredIf，但当前RequiredIf未触发之前触发的模型数据注释。
新[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
public class RequiredIfAttribute : ValidationAttribute, IClientValidatable
{
private readonly string defaultErrorMessageFormatString = "The {0} is required";
public List<string> DependentProperties { get; private set; }
public List<string> DependentValues { get; private set; }
public string Props { get; private set; }
public string Vals { get; private set; }
public string RequiredFieldValue { get; private set; }
//To avoid multiple rules with same name
public static Dictionary<string, int> CountPerField;
//Required if you want to use this attribute multiple times
private readonly object typeId = new object();
public override object TypeId
{
get { return typeId; }
}
public RequiredIfAttribute(string dependentProperties,
string dependentValues = "", string requiredValue = "val")
{
if (string.IsNullOrWhiteSpace(dependentProperties))
{
throw new ArgumentNullException("dependentProperties");
}
string[] props = dependentProperties.Trim().Split(',');
if (props != null && props.Length == 0)
{
throw new ArgumentException("Prameter Invalid:DependentProperties");
}
if (props.Contains("") || props.Contains(null))
{
throw new ArgumentException("Prameter Invalid:DependentProperties," +
"One of the Property Name is Empty");
}
string[] vals = null;
if (!string.IsNullOrWhiteSpace(dependentValues))
vals = dependentValues.Trim().Split(',');
if (vals != null && vals.Length != props.Length)
{
throw new ArgumentException("Different Number " +
"Of DependentProperties And DependentValues");
}
DependentProperties = new List<string>();
DependentProperties.AddRange(props);
Props = dependentProperties.Trim();
if (vals != null)
{
DependentValues = new List<string>();
DependentValues.AddRange(vals);
Vals = dependentValues.Trim();
}
if (requiredValue == "val")
RequiredFieldValue = "val";
else if (string.IsNullOrWhiteSpace(requiredValue))
{
RequiredFieldValue = string.Empty;
defaultErrorMessageFormatString = "The {0} should not be given";
}
else
{
RequiredFieldValue = requiredValue;
defaultErrorMessageFormatString =
"The {0} should be:" + RequiredFieldValue;
}
if (props.Length == 1)
{
if (vals != null)
{
ErrorMessage = defaultErrorMessageFormatString +
@", When " + props[0] + @" is ";
if (vals[0] == "val")
ErrorMessage += @" given";
else if (vals[0] == "")
ErrorMessage += @" not given";
else
ErrorMessage += vals[0];
}
else
ErrorMessage = defaultErrorMessageFormatString +
@", When " + props[0] + @" is given";
}
else
{
if (vals != null)
{
ErrorMessage = defaultErrorMessageFormatString +
@", When " + dependentProperties + @" are: ";
foreach (string val in vals)
{
if (val == "val")
ErrorMessage += @"AnyValue,";
else if (val == "")
ErrorMessage += @"Empty,";
else
ErrorMessage += val + @",";
}
ErrorMessage = ErrorMessage.Remove(ErrorMessage.Length - 1);
}
else
ErrorMessage = defaultErrorMessageFormatString + @", When " +
dependentProperties + @" are given";
}
}
protected override ValidationResult IsValid(object value,
ValidationContext validationContext)
{
//Validate Dependent Property Values First
for (int i = 0; i < DependentProperties.Count; i++)
{
var contextProp =
validationContext.ObjectInstance.GetType().
GetProperty(DependentProperties[i]);
var contextPropVal = Convert.ToString(contextProp.GetValue(
validationContext.ObjectInstance, null));
var requiredPropVal = "val";
if (DependentValues != null)
requiredPropVal = DependentValues[i];
if (requiredPropVal ==
"val" && string.IsNullOrWhiteSpace(contextPropVal))
return ValidationResult.Success;
else if (requiredPropVal == string.Empty &&
!string.IsNullOrWhiteSpace(contextPropVal))
return ValidationResult.Success;
else if (requiredPropVal != string.Empty && requiredPropVal !=
"val" && requiredPropVal != contextPropVal)
return ValidationResult.Success;
}
string fieldVal = (value != null ? value.ToString() : string.Empty);
if (RequiredFieldValue == "val" && fieldVal.Length == 0)
return new ValidationResult(string.Format(
ErrorMessageString, validationContext.DisplayName));
else if (RequiredFieldValue == string.Empty && fieldVal.Length != 0)
return new ValidationResult(string.Format(
ErrorMessageString, validationContext.DisplayName));
else if (RequiredFieldValue != string.Empty && RequiredFieldValue
!= "val" && RequiredFieldValue != fieldVal)
return new ValidationResult(string.Format(ErrorMessageString,
validationContext.DisplayName));
return ValidationResult.Success;
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(
ModelMetadata metadata, ControllerContext context)
{
int count = 0;
string key = metadata.ContainerType.FullName + "." + metadata.GetDisplayName();
if (CountPerField == null)
CountPerField = new Dictionary<string, int>();
if (CountPerField.ContainsKey(key))
{
count = ++CountPerField[key];
}
else
CountPerField.Add(key, count);
yield return new RequiredIfValidationRule(string.Format(ErrorMessageString,
metadata.GetDisplayName()), RequiredFieldValue, Props, Vals, count);
}
}
public class RequiredIfValidationRule : ModelClientValidationRule
{
public RequiredIfValidationRule(string errorMessage, string reqVal,
string otherProperties, string otherValues, int count)
{
int i = 0;
while (count > 26)
{
count -= 26;
i++;
}
var tmp = count == 0 ? "" : Char.ConvertFromUtf32(96 + count);
while (i > 0)
{
tmp += tmp;
i--;
}
ErrorMessage = errorMessage;
ValidationType = "requiredif" + tmp;
ValidationParameters.Add("reqval", reqVal);
ValidationParameters.Add("others", otherProperties);
ValidationParameters.Add("values", otherValues);
}
}
属性中出现了什么问题。
任何建议/答案都将受到高度赞赏。??
旧的RequiredIf代码：
Codeproject链接了解更多信息：Codeproject
[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
public class RequiredIfAttribute : ValidationAttribute, IClientValidatable
{
private String PropertyName { get; set; }
private Object DesiredValue { get; set; }
private readonly RequiredAttribute _innerAttribute;
public RequiredIfAttribute(String propertyName, Object desiredvalue)
{
PropertyName = propertyName;
DesiredValue = desiredvalue;
_innerAttribute = new RequiredAttribute();
}
protected override ValidationResult IsValid(object value, ValidationContext context)
{
if (context.ObjectInstance.GetType().GetProperty(PropertyName) != null)
{
var dependentValue =
context.ObjectInstance.GetType().GetProperty(PropertyName).GetValue(context.ObjectInstance, null);
if (dependentValue != null && dependentValue.ToString() == DesiredValue.ToString())
{
if (!_innerAttribute.IsValid(value))
{
return new ValidationResult(FormatErrorMessage(context.DisplayName), new[] { context.MemberName });
}
}
}
return ValidationResult.Success;
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule
{
ErrorMessage = ErrorMessageString,
ValidationType = "requiredif",
};
// ReSharper disable once PossibleNullReferenceException
rule.ValidationParameters["dependentproperty"] = (context as ViewContext).ViewData.TemplateInfo.GetFullHtmlFieldId(PropertyName);
rule.ValidationParameters["desiredvalue"] = DesiredValue is bool ? DesiredValue.ToString().ToLower() : DesiredValue;
yield return rule;
}
}
新的RequiredIf代码：
Stackoverflow链接获取更多信息：Stackoverflow
AsyncTask