/// <summary>
/// Converts the given object to another type. The most common types to convert
/// are to and from a string object. The default implementation will make a call
/// to ToString on the object if the object is valid and if the destination
/// type is string. If this cannot convert to the desitnation type, this will
/// throw a NotSupportedException.
/// </summary>
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException(nameof(destinationType));
}
if (destinationType == typeof(string) && value != null)
{
PropertyInfo[] props = GetProperties();
int bestMatch = -1;
for (int i = 0; i < props.Length; i++)
{
PropertyInfo prop = props[i];
object[] tempIndex = null;
Cursor c = (Cursor)prop.GetValue(null, tempIndex);
if (c == (Cursor)value)
{
if (Object.ReferenceEquals(c, value))
{
return(prop.Name);
}
else
{
bestMatch = i;
}
}
}
if (bestMatch != -1)
{
return(props[bestMatch].Name);
}
// We throw here because we cannot meaningfully convert a custom
// cursor into a string. In fact, the ResXResourceWriter will use
// this exception to indicate to itself that this object should
// be serialized through ISeriazable instead of a string.
//
throw new FormatException(SR.CursorCannotCovertToString);
}
if (destinationType == typeof(InstanceDescriptor) && value is Cursor)
{
PropertyInfo[] props = GetProperties();
foreach (PropertyInfo prop in props)
{
if (prop.GetValue(null, null) == value)
{
return(new InstanceDescriptor(prop, null));
}
}
}
if (destinationType == typeof(byte[]))
{
if (value != null)
{
MemoryStream ms = new MemoryStream();
Cursor cursor = (Cursor)value;
cursor.SavePicture(ms);
ms.Close();
return(ms.ToArray());
}
else
{
return(Array.Empty <byte>());
}
}
return(base.ConvertTo(context, culture, value, destinationType));
}
