public override object ConvertTo
(
System.ComponentModel.ITypeDescriptorContext context,
System.Globalization.CultureInfo culture,
object value,
Type destinationType
)
{
if (typeof(string) == destinationType)
{
Source_FrequencyBandList channelList = value as Source_FrequencyBandList;
if (null == channelList)
{
throw new ArgumentException("Expected a Source_FrequencyBandList", "value");
}
StringBuilder sb = new StringBuilder( );
foreach (Source_FrequencyBand channel in channelList)
{
Object obj = TypeDescriptor.GetConverter(typeof(Source_FrequencyBand)).ConvertToString(channel);
if (null == obj)
{
// Should NOT be possible ~ should get exception for bad arg
// before seeing a null == obj return value
}
else
{
sb.Append(obj as String);
sb.Append(';');
}
}
return(sb.ToString( ));
}
return(base.ConvertTo(context, culture, value, destinationType));
}
public override object ConvertFrom
(
System.ComponentModel.ITypeDescriptorContext context,
System.Globalization.CultureInfo culture,
Object value
)
{
Source_FrequencyBandList channelList = new Source_FrequencyBandList( );
if (String.IsNullOrEmpty(value as string))
{
return(channelList);
}
String[] channelStrings = (value as String).Split(new Char[] { ';' });
if (null == channelStrings)
{
return(channelList);
}
foreach (String s in channelStrings)
{
Object obj = TypeDescriptor.GetConverter(typeof(Source_FrequencyBand)).ConvertFromString(s);
if (null == obj)
{
// TODO : supply err msg || rely on Source_FrequencyBand converter for msg
}
else
{
channelList.Add(obj as Source_FrequencyBand);
}
}
return(channelList);
}
