public static void AddModelError(this ModelStateDictionary modelState,
int errorCode,
string propertyName = null,
object parameters = null)
{
//Try and get the custom error
CustomErrorMessage customError = CustomErrorMessages.GetError(errorCode);
if (customError == null)
{
throw new ArgumentException("errorCode", "Cannot find custom error message with this code");
}
//Add the error to the modelstate
string title = customError.Title;
string description = customError.Description;
//Resolve the parameters
if (parameters != null)
{
title = parameters.Resolve(title);
description = parameters.Resolve(description);
}
//add the summary message if it doesnt already exist
if (!string.IsNullOrWhiteSpace(title) && !modelState.Any(m => m.Key == "" && m.Value.Errors.Any(e => e.ErrorMessage == title)))
{
modelState.AddModelError("", title);
}
if (!string.IsNullOrWhiteSpace(description))
{
//If no property then add description as second line of summary
if (string.IsNullOrWhiteSpace(propertyName))
{
if (!string.IsNullOrWhiteSpace(title) &&
!modelState.Any(m => m.Key == "" && m.Value.Errors.Any(e => e.ErrorMessage == title)))
{
modelState.AddModelError("", title);
}
}
//add the inline message if it doesnt already exist
else if (!modelState.Any(m => m.Key.EqualsI(propertyName) && m.Value.Errors.Any(e => e.ErrorMessage == description)))
{
modelState.AddModelError(propertyName, description);
}
}
}
private static Dictionary <string, object> CustomAttributesFor <TModel, TProperty>(IHtmlHelper <TModel> htmlHelper,
Expression <Func <TModel, TProperty> > expression,
object htmlAttributes = null)
{
Type containerType = typeof(TModel);
string propertyName = GetModelExpressionProvider(htmlHelper).GetExpressionText(expression);
PropertyInfo propertyInfo = containerType.GetPropertyInfo(propertyName);
var displayNameAttribute =
propertyInfo?.GetCustomAttributes(typeof(DisplayNameAttribute), false).FirstOrDefault() as DisplayNameAttribute;
var displayAttribute = propertyInfo?.GetCustomAttributes(typeof(DisplayAttribute), false).FirstOrDefault() as DisplayAttribute;
string displayName = displayNameAttribute != null ? displayNameAttribute.DisplayName :
displayAttribute != null ? displayAttribute.Name : propertyName;
string par1 = null;
string par2 = null;
Dictionary <string, object> htmlAttr = htmlAttributes.ToPropertyDictionary();
if (propertyInfo != null)
{
foreach (ValidationAttribute attribute in propertyInfo.GetCustomAttributes(typeof(ValidationAttribute), false))
{
string validatorKey = $"{containerType.Name}.{propertyName}:{attribute.GetType().Name.TrimSuffix("Attribute")}";
CustomErrorMessage customError = CustomErrorMessages.GetValidationError(validatorKey);
if (customError == null)
{
continue;
}
//Set the message from the description
if (attribute.ErrorMessage != customError.Description)
{
attribute.ErrorMessage = customError.Description;
}
//Set the inline error message
var errorMessageString = Misc.GetPropertyValue(attribute, "ErrorMessageString") as string;
if (string.IsNullOrWhiteSpace(errorMessageString))
{
errorMessageString = attribute.ErrorMessage;
}
//Set the summary error message
if (customError.Title != errorMessageString)
{
errorMessageString = customError.Title;
}
//Set the display name
if (!string.IsNullOrWhiteSpace(customError.DisplayName) && customError.DisplayName != displayName)
{
if (displayAttribute != null)
{
Misc.SetPropertyValue(displayAttribute, "Name", customError.DisplayName);
}
displayName = customError.DisplayName;
}
string altAttr = null;
if (attribute is RequiredAttribute)
{
altAttr = "data-val-required-alt";
}
else if (attribute is CompareAttribute)
{
altAttr = "data-val-equalto-alt";
}
else if (attribute is RegularExpressionAttribute)
{
altAttr = "data-val-regex-alt";
}
else if (attribute is RangeAttribute)
{
altAttr = "data-val-range-alt";
par1 = ((RangeAttribute)attribute).Minimum.ToString();
par2 = ((RangeAttribute)attribute).Maximum.ToString();
}
else if (attribute is DataTypeAttribute)
{
string type = ((DataTypeAttribute)attribute).DataType.ToString().ToLower();
switch (type)
{
case "password":
continue;
case "emailaddress":
type = "email";
break;
case "phonenumber":
type = "phone";
break;
}
altAttr = $"data-val-{type}-alt";
}
else if (attribute is MinLengthAttribute)
{
altAttr = "data-val-minlength-alt";
par1 = ((MinLengthAttribute)attribute).Length.ToString();
}
else if (attribute is MaxLengthAttribute)
{
altAttr = "data-val-maxlength-alt";
par1 = ((MaxLengthAttribute)attribute).Length.ToString();
}
else if (attribute is StringLengthAttribute)
{
altAttr = "data-val-length-alt";
par1 = ((StringLengthAttribute)attribute).MinimumLength.ToString();
par2 = ((StringLengthAttribute)attribute).MaximumLength.ToString();
}
htmlAttr[altAttr.TrimSuffix("-alt")] = string.Format(attribute.ErrorMessage, displayName, par1, par2);
htmlAttr[altAttr] = string.Format(errorMessageString, displayName, par1, par2);
}
}
return(htmlAttr);
}
public void Insert(int index, CustomErrorMessage element)
{
base.BaseAdd(index, element);
}
public static void CleanModelErrors <TModel>(this Controller controller)
{
Type containerType = typeof(TModel);
//Save the old modelstate
var oldModelState = new ModelStateDictionary();
foreach (KeyValuePair <string, ModelStateEntry> modelState in controller.ModelState)
{
string propertyName = modelState.Key;
foreach (ModelError error in modelState.Value.Errors)
{
bool exists = oldModelState.Any(
m => m.Key == propertyName && m.Value.Errors.Any(e => e.ErrorMessage == error.ErrorMessage));
//add the inline message if it doesnt already exist
if (!exists)
{
oldModelState.AddModelError(propertyName, error.ErrorMessage);
}
}
}
//Clear the model state ready for refill
controller.ModelState.Clear();
foreach (KeyValuePair <string, ModelStateEntry> modelState in oldModelState)
{
//Get the property name
string propertyName = modelState.Key;
//Get the validation attributes
PropertyInfo propertyInfo = string.IsNullOrWhiteSpace(propertyName) ? null : containerType.GetPropertyInfo(propertyName);
List <ValidationAttribute> attributes = propertyInfo == null
? null
: propertyInfo.GetCustomAttributes(typeof(ValidationAttribute), false).ToList <ValidationAttribute>();
//Get the display name
var displayNameAttribute =
propertyInfo?.GetCustomAttributes(typeof(DisplayNameAttribute), false).FirstOrDefault() as DisplayNameAttribute;
var displayAttribute =
propertyInfo?.GetCustomAttributes(typeof(DisplayAttribute), false).FirstOrDefault() as DisplayAttribute;
string displayName = displayNameAttribute != null ? displayNameAttribute.DisplayName :
displayAttribute != null ? displayAttribute.Name : propertyName;
foreach (ModelError error in modelState.Value.Errors)
{
string title = string.IsNullOrWhiteSpace(propertyName) ? error.ErrorMessage : null;
string description = !string.IsNullOrWhiteSpace(propertyName) ? error.ErrorMessage : null;
if (error.ErrorMessage.Like("The value * is not valid for *."))
{
title = "There's a problem with your values.";
description = "The value here is invalid.";
}
if (attributes != null && attributes.Any())
{
ValidationAttribute attribute = attributes.FirstOrDefault(a => a.FormatErrorMessage(displayName) == error.ErrorMessage);
if (attribute != null)
{
string validatorKey = $"{containerType.Name}.{propertyName}:{attribute.GetType().Name.TrimSuffix("Attribute")}";
CustomErrorMessage customError = CustomErrorMessages.GetValidationError(validatorKey);
if (customError != null)
{
title = attribute.FormatError(customError.Title, displayName);
description = attribute.FormatError(customError.Description, displayName);
}
}
}
//add the summary message if it doesnt already exist
if (!string.IsNullOrWhiteSpace(title) &&
!controller.ModelState.Any(m => m.Key == "" && m.Value.Errors.Any(e => e.ErrorMessage == title)))
{
controller.ModelState.AddModelError("", title);
}
//add the inline message if it doesnt already exist
if (!string.IsNullOrWhiteSpace(description) &&
!string.IsNullOrWhiteSpace(propertyName) &&
!controller.ModelState.Any(
m => m.Key.EqualsI(propertyName) && m.Value.Errors.Any(e => e.ErrorMessage == description)))
{
controller.ModelState.AddModelError(propertyName, description);
}
}
}
}
public void Add(CustomErrorMessage element)
{
base.BaseAdd(element);
}
