static void RuntimeUse()
{
Type type = typeof(Class1);
object[] arr = type.GetCustomAttributes(typeof(HelpAttribute), true);
if (arr.Length == 0)
{
Console.WriteLine("Class1 has no Help attribute.");
}
else
{
HelpAttribute ha = (HelpAttribute)arr[0];
Console.WriteLine("Url = {0}, Topic = {1}", ha.Url, ha.Topic);
}
}
public static void Usage()
{
Type widgetType = typeof(Widget);
object[] widgetClassAttributes = widgetType.GetCustomAttributes(typeof(HelpAttribute), false);
if (widgetClassAttributes.Length > 0)
{
HelpAttribute attr = (HelpAttribute)widgetClassAttributes[0];
Console.WriteLine($"Widget class help URL: {attr.Url} - Related topic: {attr.Topic}");
}
System.Reflection.MethodInfo displayMethod = widgetType.GetMethod(nameof(Widget.Display));
object[] displayMethodAttributes = displayMethod.GetCustomAttributes(typeof(HelpAttribute), false);
if (displayMethodAttributes.Length > 0)
{
HelpAttribute attr = (HelpAttribute)displayMethodAttributes[0];
Console.WriteLine($"Display method help URL: {attr.Url} - Related topic: {attr.Topic}");
}
}
