07-23-2023, 09:19 AM
Great snippet @mathieu. I needed to use this for converting longs, but rather than making a LongArrayConverter, I wrote up a version that uses Generics.
public class ArrayConverter<T> : TypeConverter
{
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
return sourceType == typeof(string);
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
string val = value as string;
if (string.IsNullOrEmpty(val))
return new T[0];
string[] vals = val.Split(',');
List<T> items = new List<T>();
Type type = typeof(T);
foreach (string s in vals)
{
T item = (T)Convert.ChangeType(s, type);
items.Add(item);
}
return items.ToArray();
}
}
This version should work with any type that is convertible from string.
[TypeConverter(typeof(ArrayConverter<int>))]
public int[] Ints { get; set; }
[TypeConverter(typeof(ArrayConverter<long>))]
public long[] Longs { get; set; }
[TypeConverter(typeof(ArrayConverter<DateTime))]
public DateTime[] DateTimes { get; set; }
public class ArrayConverter<T> : TypeConverter
{
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
return sourceType == typeof(string);
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
string val = value as string;
if (string.IsNullOrEmpty(val))
return new T[0];
string[] vals = val.Split(',');
List<T> items = new List<T>();
Type type = typeof(T);
foreach (string s in vals)
{
T item = (T)Convert.ChangeType(s, type);
items.Add(item);
}
return items.ToArray();
}
}
This version should work with any type that is convertible from string.
[TypeConverter(typeof(ArrayConverter<int>))]
public int[] Ints { get; set; }
[TypeConverter(typeof(ArrayConverter<long>))]
public long[] Longs { get; set; }
[TypeConverter(typeof(ArrayConverter<DateTime))]
public DateTime[] DateTimes { get; set; }