public static string ConvertToString(object o)
{
if (o == null)
{
return(null);
}
if (o.GetType().GetTypeInfo().IsEnum)
{
// Try to convert the Enum value using the StringValue attribute.
var enumType = o.GetType();
FieldInfo field = enumType.GetField(o.ToString());
StringValueAttribute attribute = field.GetCustomAttribute <StringValueAttribute>();
return(attribute != null ? attribute.Text : o.ToString());
}
if (o is DateTime)
{
// Honor RFC3339.
return(ConvertToRFC3339((DateTime)o));
}
if (o is bool)
{
return(o.ToString().ToLowerInvariant());
}
return(o.ToString());
}
public override object ConvertTo(ITypeDescriptorContext context,
CultureInfo culture,
object value,
Type destinationType)
{
if (value == null)
{
return(null);
}
Type enumType = value.GetType();
if (!CanConvertTo(context, destinationType) || !CanConvertFrom(context, enumType))
{
return(base.ConvertTo(context, culture, value, destinationType));
}
// Get the field in the enum.
FieldInfo field = enumType.GetField(value.ToString());
// Check if this element has a StringValueAttribute.
StringValueAttribute attribute = field.GetCustomAttribute <StringValueAttribute>();
// If it has an attribute, then return the specified text, otherwise use the default overload.
return(attribute != null ? attribute.Text : value.ToString());
}
public void ConstructTest()
{
// Test parameter validation/
Assert.Throws<ArgumentNullException>(() => new StringValueAttribute(null));
// Test normal operation.
var attribute = new StringValueAttribute("FooBar");
Assert.AreEqual("FooBar", attribute.Text);
}
/// <summary>
/// Tries to convert the specified object to a string. Uses custom type converters if available.
/// Returns null for a null object.
/// </summary>
public static string ConvertToString(object o)
{
if (o == null)
{
return(null);
}
if (o.GetType().IsEnum)
{
// try to convert the Enum value using the StringValue attribute
var enumType = o.GetType();
FieldInfo field = enumType.GetField(o.ToString());
StringValueAttribute attribute = field.GetCustomAttribute <StringValueAttribute>();
return(attribute != null ? attribute.Text : o.ToString());
}
return(o.ToString());
}
