public static bool CanConvertType(Type initialType, Type targetType, bool allowTypeNameToString)
{
ValidationUtils.ArgumentNotNull(initialType, "initialType");
ValidationUtils.ArgumentNotNull(targetType, "targetType");
if (ReflectionUtils.IsNullableType(targetType))
{
targetType = Nullable.GetUnderlyingType(targetType);
}
if (targetType == initialType)
{
return(true);
}
if (typeof(IConvertible).IsAssignableFrom(initialType) && typeof(IConvertible).IsAssignableFrom(targetType))
{
return(true);
}
if (initialType == typeof(DateTime) && targetType == typeof(DateTimeOffset))
{
return(true);
}
if (initialType == typeof(Guid) && (targetType == typeof(Guid) || targetType == typeof(string)))
{
return(true);
}
if (initialType == typeof(Type) && targetType == typeof(string))
{
return(true);
}
TypeConverter converter = ConvertUtils.GetConverter(initialType);
if (converter != null && !ConvertUtils.IsComponentConverter(converter) && converter.CanConvertTo(targetType) && (allowTypeNameToString || converter.GetType() != typeof(TypeConverter)))
{
return(true);
}
TypeConverter typeConverter = ConvertUtils.GetConverter(targetType);
if (typeConverter != null && !ConvertUtils.IsComponentConverter(typeConverter) && typeConverter.CanConvertFrom(initialType))
{
return(true);
}
if (initialType == typeof(DBNull) && ReflectionUtils.IsNullable(targetType))
{
return(true);
}
return(false);
}
private static ConvertUtils.ConvertResult TryConvertInternal(
object initialValue,
CultureInfo culture,
Type targetType,
out object value)
{
if (initialValue == null)
{
throw new ArgumentNullException(nameof(initialValue));
}
if (ReflectionUtils.IsNullableType(targetType))
{
targetType = Nullable.GetUnderlyingType(targetType);
}
Type type = initialValue.GetType();
if (targetType == type)
{
value = initialValue;
return(ConvertUtils.ConvertResult.Success);
}
if (ConvertUtils.IsConvertible(initialValue.GetType()) && ConvertUtils.IsConvertible(targetType))
{
if (targetType.IsEnum())
{
if (initialValue is string)
{
value = Enum.Parse(targetType, initialValue.ToString(), true);
return(ConvertUtils.ConvertResult.Success);
}
if (ConvertUtils.IsInteger(initialValue))
{
value = Enum.ToObject(targetType, initialValue);
return(ConvertUtils.ConvertResult.Success);
}
}
value = Convert.ChangeType(initialValue, targetType, (IFormatProvider)culture);
return(ConvertUtils.ConvertResult.Success);
}
switch (initialValue)
{
case DateTime _ when targetType == typeof(DateTimeOffset):
value = (object)new DateTimeOffset((DateTime)initialValue);
return(ConvertUtils.ConvertResult.Success);
case byte[] _ when targetType == typeof(Guid):
value = (object)new Guid((byte[])initialValue);
return(ConvertUtils.ConvertResult.Success);
case Guid _ when targetType == typeof(byte[]):
value = (object)((Guid)initialValue).ToByteArray();
return(ConvertUtils.ConvertResult.Success);
case string str:
if (targetType == typeof(Guid))
{
value = (object)new Guid(str);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(Uri))
{
value = (object)new Uri(str, UriKind.RelativeOrAbsolute);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(TimeSpan))
{
value = (object)ConvertUtils.ParseTimeSpan(str);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(byte[]))
{
value = (object)Convert.FromBase64String(str);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(Version))
{
Version result;
if (ConvertUtils.VersionTryParse(str, out result))
{
value = (object)result;
return(ConvertUtils.ConvertResult.Success);
}
value = (object)null;
return(ConvertUtils.ConvertResult.NoValidConversion);
}
if (typeof(Type).IsAssignableFrom(targetType))
{
value = (object)Type.GetType(str, true);
return(ConvertUtils.ConvertResult.Success);
}
break;
}
TypeConverter converter1 = ConvertUtils.GetConverter(type);
if (converter1 != null && converter1.CanConvertTo(targetType))
{
value = converter1.ConvertTo((ITypeDescriptorContext)null, culture, initialValue, targetType);
return(ConvertUtils.ConvertResult.Success);
}
TypeConverter converter2 = ConvertUtils.GetConverter(targetType);
if (converter2 != null && converter2.CanConvertFrom(type))
{
value = converter2.ConvertFrom((ITypeDescriptorContext)null, culture, initialValue);
return(ConvertUtils.ConvertResult.Success);
}
if (initialValue == DBNull.Value)
{
if (ReflectionUtils.IsNullable(targetType))
{
value = ConvertUtils.EnsureTypeAssignable((object)null, type, targetType);
return(ConvertUtils.ConvertResult.Success);
}
value = (object)null;
return(ConvertUtils.ConvertResult.CannotConvertNull);
}
if (targetType.IsInterface() || targetType.IsGenericTypeDefinition() || targetType.IsAbstract())
{
value = (object)null;
return(ConvertUtils.ConvertResult.NotInstantiableType);
}
value = (object)null;
return(ConvertUtils.ConvertResult.NoValidConversion);
}
public static object Convert(object initialValue, CultureInfo culture, Type targetType)
{
if (initialValue == null)
{
throw new ArgumentNullException("initialValue");
}
if (ReflectionUtils.IsNullableType(targetType))
{
targetType = Nullable.GetUnderlyingType(targetType);
}
Type type = initialValue.GetType();
if (targetType == type)
{
return(initialValue);
}
if (ConvertUtils.IsConvertible(initialValue) && ConvertUtils.IsConvertible(targetType))
{
if (TypeExtensions.IsEnum(targetType))
{
if (initialValue is string)
{
return(Enum.Parse(targetType, initialValue.ToString(), true));
}
if (ConvertUtils.IsInteger(initialValue))
{
return(Enum.ToObject(targetType, initialValue));
}
}
return(Convert.ChangeType(initialValue, targetType, (IFormatProvider)culture));
}
else
{
if (initialValue is string && typeof(Type).IsAssignableFrom(targetType))
{
return((object)Type.GetType((string)initialValue, true));
}
if (TypeExtensions.IsInterface(targetType) || TypeExtensions.IsGenericTypeDefinition(targetType) || TypeExtensions.IsAbstract(targetType))
{
throw new ArgumentException(StringUtils.FormatWith("Target type {0} is not a value type or a non-abstract class.", (IFormatProvider)CultureInfo.InvariantCulture, (object)targetType), "targetType");
}
if (initialValue is string)
{
if (targetType == typeof(Guid))
{
return((object)new Guid((string)initialValue));
}
if (targetType == typeof(Uri))
{
return((object)new Uri((string)initialValue, UriKind.RelativeOrAbsolute));
}
if (targetType == typeof(TimeSpan))
{
return((object)TimeSpan.Parse((string)initialValue));
}
}
TypeConverter converter1 = ConvertUtils.GetConverter(type);
if (converter1 != null && converter1.CanConvertTo(targetType))
{
return(converter1.ConvertTo((ITypeDescriptorContext)null, culture, initialValue, targetType));
}
TypeConverter converter2 = ConvertUtils.GetConverter(targetType);
if (converter2 != null && converter2.CanConvertFrom(type))
{
return(converter2.ConvertFrom((ITypeDescriptorContext)null, culture, initialValue));
}
if (initialValue == DBNull.Value)
{
if (ReflectionUtils.IsNullable(targetType))
{
return(ConvertUtils.EnsureTypeAssignable((object)null, type, targetType));
}
else
{
throw new Exception(StringUtils.FormatWith("Can not convert null {0} into non-nullable {1}.", (IFormatProvider)CultureInfo.InvariantCulture, (object)type, (object)targetType));
}
}
else if (initialValue is INullable)
{
return(ConvertUtils.EnsureTypeAssignable(ConvertUtils.ToValue((INullable)initialValue), type, targetType));
}
else
{
throw new InvalidOperationException(StringUtils.FormatWith("Can not convert from {0} to {1}.", (IFormatProvider)CultureInfo.InvariantCulture, (object)type, (object)targetType));
}
}
}
public static object Convert(object initialValue, CultureInfo culture, Type targetType)
{
if (initialValue == null)
{
throw new ArgumentNullException("initialValue");
}
if (ReflectionUtils.IsNullableType(targetType))
{
targetType = Nullable.GetUnderlyingType(targetType);
}
Type type = initialValue.GetType();
if (targetType == type)
{
return(initialValue);
}
if (initialValue is string && typeof(Type).IsAssignableFrom(targetType))
{
return(Type.GetType((string)initialValue, true));
}
if (targetType.get_IsInterface() || targetType.get_IsGenericTypeDefinition() || targetType.get_IsAbstract())
{
throw new ArgumentException("Target type {0} is not a value type or a non-abstract class.".FormatWith(CultureInfo.get_InvariantCulture(), new object[]
{
targetType
}), "targetType");
}
if (initialValue is IConvertible && typeof(IConvertible).IsAssignableFrom(targetType))
{
if (targetType.get_IsEnum())
{
if (initialValue is string)
{
return(Enum.Parse(targetType, initialValue.ToString(), true));
}
if (ConvertUtils.IsInteger(initialValue))
{
return(Enum.ToObject(targetType, initialValue));
}
}
return(System.Convert.ChangeType(initialValue, targetType, culture));
}
if (initialValue is DateTime && targetType == typeof(DateTimeOffset))
{
return(new DateTimeOffset((DateTime)initialValue));
}
if (initialValue is string)
{
if (targetType == typeof(Guid))
{
return(new Guid((string)initialValue));
}
if (targetType == typeof(Uri))
{
return(new Uri((string)initialValue));
}
if (targetType == typeof(TimeSpan))
{
return(TimeSpan.Parse((string)initialValue));
}
}
TypeConverter converter = ConvertUtils.GetConverter(type);
if (converter != null && converter.CanConvertTo(targetType))
{
return(converter.ConvertTo(null, culture, initialValue, targetType));
}
TypeConverter converter2 = ConvertUtils.GetConverter(targetType);
if (converter2 != null && converter2.CanConvertFrom(type))
{
return(converter2.ConvertFrom(null, culture, initialValue));
}
if (initialValue != DBNull.Value)
{
throw new Exception("Can not convert from {0} to {1}.".FormatWith(CultureInfo.get_InvariantCulture(), new object[]
{
type,
targetType
}));
}
if (ReflectionUtils.IsNullable(targetType))
{
return(ConvertUtils.EnsureTypeAssignable(null, type, targetType));
}
throw new Exception("Can not convert null {0} into non-nullable {1}.".FormatWith(CultureInfo.get_InvariantCulture(), new object[]
{
type,
targetType
}));
}
private static ConvertUtils.ConvertResult TryConvertInternal(object initialValue, CultureInfo culture, Type targetType, out object value)
{
Version version;
if (initialValue == null)
{
throw new ArgumentNullException("initialValue");
}
if (ReflectionUtils.IsNullableType(targetType))
{
targetType = Nullable.GetUnderlyingType(targetType);
}
Type type = initialValue.GetType();
if (targetType == type)
{
value = initialValue;
return(ConvertUtils.ConvertResult.Success);
}
if (ConvertUtils.IsConvertible(initialValue.GetType()) && ConvertUtils.IsConvertible(targetType))
{
if (targetType.IsEnum())
{
if (initialValue is string)
{
value = Enum.Parse(targetType, initialValue.ToString(), true);
return(ConvertUtils.ConvertResult.Success);
}
if (ConvertUtils.IsInteger(initialValue))
{
value = Enum.ToObject(targetType, initialValue);
return(ConvertUtils.ConvertResult.Success);
}
}
value = Convert.ChangeType(initialValue, targetType, culture);
return(ConvertUtils.ConvertResult.Success);
}
if (initialValue is DateTime && targetType == typeof(DateTimeOffset))
{
value = new DateTimeOffset((DateTime)initialValue);
return(ConvertUtils.ConvertResult.Success);
}
if (initialValue is byte[] && targetType == typeof(Guid))
{
value = new Guid((byte[])initialValue);
return(ConvertUtils.ConvertResult.Success);
}
if (initialValue is Guid && targetType == typeof(byte[]))
{
value = ((Guid)initialValue).ToByteArray();
return(ConvertUtils.ConvertResult.Success);
}
string str = initialValue as string;
if (str != null)
{
if (targetType == typeof(Guid))
{
value = new Guid(str);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(Uri))
{
value = new Uri(str, UriKind.RelativeOrAbsolute);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(TimeSpan))
{
value = ConvertUtils.ParseTimeSpan(str);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(byte[]))
{
value = Convert.FromBase64String(str);
return(ConvertUtils.ConvertResult.Success);
}
if (targetType == typeof(Version))
{
if (ConvertUtils.VersionTryParse(str, out version))
{
value = version;
return(ConvertUtils.ConvertResult.Success);
}
value = null;
return(ConvertUtils.ConvertResult.NoValidConversion);
}
if (typeof(Type).IsAssignableFrom(targetType))
{
value = Type.GetType(str, true);
return(ConvertUtils.ConvertResult.Success);
}
}
TypeConverter converter = ConvertUtils.GetConverter(type);
if (converter != null && converter.CanConvertTo(targetType))
{
value = converter.ConvertTo(null, culture, initialValue, targetType);
return(ConvertUtils.ConvertResult.Success);
}
TypeConverter typeConverter = ConvertUtils.GetConverter(targetType);
if (typeConverter != null && typeConverter.CanConvertFrom(type))
{
value = typeConverter.ConvertFrom(null, culture, initialValue);
return(ConvertUtils.ConvertResult.Success);
}
if (initialValue == DBNull.Value)
{
if (!ReflectionUtils.IsNullable(targetType))
{
value = null;
return(ConvertUtils.ConvertResult.CannotConvertNull);
}
value = ConvertUtils.EnsureTypeAssignable(null, type, targetType);
return(ConvertUtils.ConvertResult.Success);
}
if (!targetType.IsInterface() && !targetType.IsGenericTypeDefinition() && !targetType.IsAbstract())
{
value = null;
return(ConvertUtils.ConvertResult.NoValidConversion);
}
value = null;
return(ConvertUtils.ConvertResult.NotInstantiableType);
}
public static object Convert(object initialValue, CultureInfo culture, Type targetType)
{
if (initialValue == null)
{
throw new ArgumentNullException("initialValue");
}
if (ReflectionUtils.IsNullableType(targetType))
{
targetType = Nullable.GetUnderlyingType(targetType);
}
Type type = initialValue.GetType();
if (targetType == type)
{
return(initialValue);
}
if (ConvertUtils.IsConvertible(initialValue.GetType()) && ConvertUtils.IsConvertible(targetType))
{
if (targetType.IsEnum())
{
if (initialValue is string)
{
return(Enum.Parse(targetType, initialValue.ToString(), true));
}
if (ConvertUtils.IsInteger(initialValue))
{
return(Enum.ToObject(targetType, initialValue));
}
}
return(System.Convert.ChangeType(initialValue, targetType, culture));
}
if (initialValue is DateTime && targetType == typeof(DateTimeOffset))
{
return(new DateTimeOffset((DateTime)initialValue));
}
if (initialValue is byte[] && targetType == typeof(Guid))
{
return(new Guid((byte[])initialValue));
}
if (initialValue is string)
{
if (targetType == typeof(Guid))
{
return(new Guid((string)initialValue));
}
if (targetType == typeof(Uri))
{
return(new Uri((string)initialValue, UriKind.RelativeOrAbsolute));
}
if (targetType == typeof(TimeSpan))
{
return(ConvertUtils.ParseTimeSpan((string)initialValue));
}
if (targetType == typeof(byte[]))
{
return(System.Convert.FromBase64String((string)initialValue));
}
if (typeof(Type).IsAssignableFrom(targetType))
{
return(Type.GetType((string)initialValue, true));
}
}
if (targetType == typeof(BigInteger))
{
return(ConvertUtils.ToBigInteger(initialValue));
}
if (initialValue is BigInteger)
{
return(ConvertUtils.FromBigInteger((BigInteger)initialValue, targetType));
}
TypeConverter converter = ConvertUtils.GetConverter(type);
if (converter != null && converter.CanConvertTo(targetType))
{
return(converter.ConvertTo(null, culture, initialValue, targetType));
}
TypeConverter converter2 = ConvertUtils.GetConverter(targetType);
if (converter2 != null && converter2.CanConvertFrom(type))
{
return(converter2.ConvertFrom(null, culture, initialValue));
}
if (initialValue == DBNull.Value)
{
if (ReflectionUtils.IsNullable(targetType))
{
return(ConvertUtils.EnsureTypeAssignable(null, type, targetType));
}
throw new Exception("Can not convert null {0} into non-nullable {1}.".FormatWith(CultureInfo.InvariantCulture, type, targetType));
}
else
{
if (initialValue is INullable)
{
return(ConvertUtils.EnsureTypeAssignable(ConvertUtils.ToValue((INullable)initialValue), type, targetType));
}
if (targetType.IsInterface() || targetType.IsGenericTypeDefinition() || targetType.IsAbstract())
{
throw new ArgumentException("Target type {0} is not a value type or a non-abstract class.".FormatWith(CultureInfo.InvariantCulture, targetType), "targetType");
}
throw new InvalidOperationException("Can not convert from {0} to {1}.".FormatWith(CultureInfo.InvariantCulture, type, targetType));
}
}