Add the overrided methods that allow non-standard conversion to and from string type (add System.Drawing namespace)
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
if(sourceType == typeof(string)) {
return true;
}
else {
return base.CanConvertFrom(context, sourceType);
}
}
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
if(destinationType == typeof(string)) {
return true;
}
else {
return base.CanConvertTo(context, destinationType);
}
}
public override object ConvertFrom(ITypeDescriptorContext context,
System.Globalization.CultureInfo culture, object value) {
if(value is string) {
try {
string[] pointsString = ((string)value).Split(',');
List<Point> points = new List<Point>();
foreach(string s in pointsString) {
string tmp = s.TrimStart('(', ' ').TrimEnd(')', ' ');
string[] pointCoordinates = tmp.Split(';');
points.Add(new Point(int.Parse(pointCoordinates[0]), int.Parse(pointCoordinates[1])));
}
return points.ToArray();
}
catch(Exception ex) {
throw new FormatException(ex.Message, ex);
}
}
else {
return base.ConvertFrom(context, culture, value);
}
}
public override object ConvertTo(ITypeDescriptorContext context,
System.Globalization.CultureInfo culture, object value, Type destinationType) {
if(destinationType == typeof(string)) {
try {
Point[] points = (Point[])value;
StringBuilder sb = new StringBuilder();
for(int i = 0; i < points.Length; i++) {
sb.AppendFormat("({0}; {1})", points[i].X, points[i].Y);
if(i < points.Length - 1) {
sb.Append(',');
}
}
return sb.ToString();
}
catch(Exception ex) {
throw new FormatException(ex.Message, ex);
}
}
else {
return base.ConvertTo(context, culture, value, destinationType);
}
}
