public void TestToDouble()
{
Assert.Null(DoubleConverter.ToNullableDouble(null));
Assert.True(Math.Abs(123 - DoubleConverter.ToDouble(123)) < 0.001);
Assert.True(Math.Abs(123.456 - DoubleConverter.ToDouble(123.456)) < 0.001);
Assert.True(Math.Abs(123.456 - DoubleConverter.ToDouble("123.456")) < 0.001);
Assert.True(Math.Abs(123 - DoubleConverter.ToDoubleWithDefault(null, 123)) < 0.001);
Assert.True(Math.Abs(0 - DoubleConverter.ToDoubleWithDefault(false, 123)) < 0.001);
Assert.True(Math.Abs(123 - DoubleConverter.ToDoubleWithDefault("ABC", 123)) < 0.001);
}
public static T ToTypeWithDefault <T>(object value, T defaultValue)
{
if (value == null)
{
return(defaultValue);
}
if (value is T)
{
return((T)value);
}
var typeInfo = typeof(T).GetTypeInfo();
if (typeInfo.IsEnum)
{
value = EnumConverter.ToEnumWithDefault <T>(value, defaultValue);
}
else if (typeInfo.IsAssignableFrom(typeof(decimal)))
{
value = DecimalConverter.ToNullableDecimal(value);
}
else if (typeInfo.IsAssignableFrom(typeof(string)))
{
value = StringConverter.ToNullableString(value);
}
else if (typeInfo.IsAssignableFrom(typeof(long)))
{
value = LongConverter.ToNullableLong(value);
}
else if (typeInfo.IsAssignableFrom(typeof(int)))
{
value = IntegerConverter.ToNullableInteger(value);
}
else if (typeInfo.IsAssignableFrom(typeof(double)))
{
value = DoubleConverter.ToNullableDouble(value);
}
else if (typeInfo.IsAssignableFrom(typeof(float)))
{
value = FloatConverter.ToNullableFloat(value);
}
else if (typeInfo.IsAssignableFrom(typeof(bool)))
{
value = BooleanConverter.ToNullableBoolean(value);
}
else if (typeInfo.IsAssignableFrom(typeof(DateTime)))
{
value = DateTimeConverter.ToNullableDateTime(value);
}
else if (typeInfo.IsAssignableFrom(typeof(TimeSpan)))
{
value = TimeSpanConverter.ToNullableTimeSpan(value);
}
if (value == null)
{
return(defaultValue);
}
try
{
if (typeInfo.IsClass || typeInfo.IsInterface)
{
return(value is T ? (T)value : defaultValue);
}
else
{
return((T)value);
}
}
catch
{
return(defaultValue);
}
}
public static T?ToNullableType <T>(object value) where T : struct
{
if (value == null)
{
return(null);
}
if (value is T)
{
return((T)value);
}
var typeInfo = typeof(T).GetTypeInfo();
if (typeInfo.IsEnum)
{
value = EnumConverter.ToNullableEnum <T>(value);
}
else if (typeInfo.IsAssignableFrom(typeof(decimal)))
{
value = DecimalConverter.ToNullableDecimal(value);
}
else if (typeInfo.IsAssignableFrom(typeof(string)))
{
value = StringConverter.ToNullableString(value);
}
else if (typeInfo.IsAssignableFrom(typeof(long)))
{
value = LongConverter.ToNullableLong(value);
}
else if (typeInfo.IsAssignableFrom(typeof(int)))
{
value = IntegerConverter.ToNullableInteger(value);
}
else if (typeInfo.IsAssignableFrom(typeof(double)))
{
value = DoubleConverter.ToNullableDouble(value);
}
else if (typeInfo.IsAssignableFrom(typeof(float)))
{
value = FloatConverter.ToNullableFloat(value);
}
else if (typeInfo.IsAssignableFrom(typeof(DateTime)))
{
value = DateTimeConverter.ToNullableDateTime(value);
}
else if (typeInfo.IsAssignableFrom(typeof(TimeSpan)))
{
value = TimeSpanConverter.ToNullableTimeSpan(value);
}
if (value == null)
{
return(null);
}
try
{
return((T)value);
}
catch
{
return(null);
}
}
