protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
PropertyInfo otherPropertyInfo = validationContext.ObjectType.GetProperty(OtherProperty);
if (otherPropertyInfo == null)
{
//TODO: Globalization
return(new ValidationResult(String.Format(CultureInfo.CurrentCulture,
"Could not find a property named {0}.", OtherProperty)));
}
object otherValue = otherPropertyInfo.GetValue(validationContext.ObjectInstance, null);
if (null == value && null == otherValue)
{
return(null);
}
if (null == value || null == otherValue)
{
return(null);
}
ValidationDataType valueType;
if (!TypeDataTypeMap.TryGetValue(value.GetType(), out valueType))
{
return(null); //we can't judge this pair as know nothing about them
}
if (Type != ValidationDataType.String)
{
return(CompareNonString(value, validationContext, otherPropertyInfo, otherValue,
valueType));
}
else //Type is string
{
value = Convert.ToString(value);
otherValue = Convert.ToString(otherValue);
if (String.IsNullOrWhiteSpace((string)value) ||
String.IsNullOrWhiteSpace((string)otherValue))
{
return(null);
}
if (!Comparers[Operator]((IComparable)value, (IComparable)otherValue))
{
TryToExtractOtherPropertyTitle(otherPropertyInfo);
return(new ValidationResult(FormatErrorMessage(validationContext.DisplayName)));
}
}
return(null);
}
private ValidationResult CompareNonString(object value, ValidationContext validationContext,
PropertyInfo otherPropertyInfo, object otherValue, ValidationDataType valueType)
{
if (valueType == ValidationDataType.String)
{
var otherValueString = Convert.ToString(otherValue);
if (String.IsNullOrWhiteSpace((string)value) || String.IsNullOrWhiteSpace(otherValueString))
{
return(null);
}
try {
value = Convert.ChangeType(value, DataTypeTypeMap[Type]);
otherValue = Convert.ChangeType(otherValue, DataTypeTypeMap[Type]);
}
catch {
return(new ValidationResult(FormatErrorMessage(validationContext.DisplayName)));
}
}
else
{
ValidationDataType otherValueType;
if (!TypeDataTypeMap.TryGetValue(otherValue.GetType(), out otherValueType))
{
return(null); //we can't judge this pair as know nothing about them
}
if (valueType != Type || otherValueType != Type)
{
try {
value = Convert.ChangeType(value, DataTypeTypeMap[Type]);
otherValue = Convert.ChangeType(otherValue, DataTypeTypeMap[Type]);
}
catch (InvalidCastException) {
return(null); //we can't judge this pair as know nothing about them
}
}
if (!(value is IComparable) || !(otherValue is IComparable))
{
TryToExtractOtherPropertyTitle(otherPropertyInfo);
return(new ValidationResult(FormatErrorMessage(validationContext.DisplayName)));
}
}
if (!Comparers[Operator]((IComparable)value, (IComparable)otherValue))
{
TryToExtractOtherPropertyTitle(otherPropertyInfo);
return(new ValidationResult(FormatErrorMessage(validationContext.DisplayName)));
}
return(null);
}
protected ValidationResult IsValidDataType(object value, ValidationContext context)
{
if (null == value)
{
return(null);
}
ValidationDataType valueType;
if (!TypeDataTypeMap.TryGetValue(value.GetType(), out valueType))
{
return(new ValidationResult(FormatErrorMessage(context.DisplayName)));
}
if (valueType == Type)
{
return(null);
}
if (Type == ValidationDataType.String)
{
return(new ValidationResult(FormatErrorMessage(context.DisplayName)));
}
if (valueType != ValidationDataType.String)
{
return(new ValidationResult(FormatErrorMessage(context.DisplayName)));
}
if (String.IsNullOrEmpty((string)value))
{
return(null);
}
try {
Convert.ChangeType(value, DataTypeTypeMap[Type]);
return(null);
}
catch {
return(new ValidationResult(FormatErrorMessage(context.DisplayName)));
}
}
