Professional IronPython

LISTINg 14-4: 
 Using the ADynamicObject class
class Test
{
static void Main()
{
// Create a new dynamic object.
dynamic DynObject = new ADynamicObject();
// Set a property to a specific value.
Console.WriteLine(“Setting a Property to a Value”);
DynObject.AProp = 5;
LISTINg 14-3 
(continued)
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Working with IDynamicObject
 
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// Use one property to set another property.
// You would see a property get, followed by a property set.
Console.WriteLine(“\r\nSetting a Property to another Property”);
DynObject.Prop1 = DynObject.AProp;
// Call a method and set its output to a property.
// You would see a method call, followed by a property set.
Console.WriteLine(“\r\nSetting a Property to a Method Output”);
DynObject.Prop2 = DynObject.AMethod();
// Call a method with a property argument and set a new property.
// You would see a property get, a method call, and finally a
// property set.
Console.WriteLine(“\r\nSetting a Property to Method Output with Args”);
DynObject.Prop3 = DynObject.AMethod(DynObject.AProp);
// Wait to see the results.
Console.WriteLine(“\r\nPress any key when ready...”);
Console.ReadLine();
}
}
Notice that the code begins by creating a new dynamic object using the 
dynamic
keyword. At this 
point, you can begin adding properties and methods to the resulting 
DynObject
. Properties can 
receive values directly, from other properties, or from methods. Methods can use arguments to 
change their output. Figure 14-6 shows the output from this example. The path that the code takes 
through the various objects helps you understand how dynamic objects work.
The 
DynamicObject
class actually provides support for a number of members. You can use these 
members to provide a complete dynamic implementation for your application. Here’s a list of the
DynamicObject
members you can override.
➤
GetDynamicMemberNames()
➤
GetMetaObject()
➤
➤
TryBinaryOperation()
➤
➤
TryConvert()
➤
➤
TryDeleteIndex()
➤
➤
TryDeleteMember()
➤
➤
TryGetIndex()
➤
➤
TryGetMember()
➤
➤
TryInvoke()
➤
➤
TryInvokeMember()
➤
➤
TrySetIndex()
➤
➤
TrySetMember()
➤
➤
TryUnaryOperation()
➤
➤
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