Professional IronPython

318
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CHAPTER 15
Using ironPython from other .net LangUages 
language, which is 
.py
in this case. The 
displayName
attribute simply tells how to display the lan-
guage. Finally, the 
type
attribute contains a description of the 
IronPython.DLL
file. As with the type 
element for 
Microsoft.Scripting.DLL
, this element should appear on a single line, even though it 
appears on multiple lines in the book. Again, you need to exercise special care with the 
Version
and 
PublicKeyToken
entries.
Now that you have the 
App.CONFIG
file created, it’s time to look at the application code. Listing 15-5 
contains the source for this example.
lISTINg 15-5: 
 Using the App.CONFIG file in an application
static void Main(string[] args)
{
// Read the configuration information from App.CONFIG.
ScriptRuntimeSetup srs = ScriptRuntimeSetup.ReadConfiguration();
// Create a ScriptRuntime object from the configuration
// information.
ScriptRuntime runtime = new ScriptRuntime(srs);
// Create an engine to access IronPython.
ScriptEngine Eng = runtime.GetEngine(“Python”);
// Describe where to load the script.
ScriptSource Source = Eng.CreateScriptSourceFromFile(“TestClass.py”);
// Obtain the default scope for executing the script.
ScriptScope Scope = Eng.CreateScope();
// Create an object for performing tasks with the script.
ObjectOperations Ops = Eng.CreateOperations();
// Create the class object.
Source.Execute(Scope);
// Obtain the class object.
Object CalcClass = Scope.GetVariable(“DoCalculations”);
// Create an instance of the class.
Object CalcObj = Ops.Invoke(CalcClass);
// Get the method you want to use from the class instance.
Object AddMe = Ops.GetMember(CalcObj, “DoAdd”);
// Perform the add.
Int32 Result = (Int32)Ops.Invoke(AddMe, 5, 10);
// Display the result.
Console.WriteLine(“5 + 10 = {0}“, Result);
// Pause after running the test.
Console.WriteLine(“\r\nPress any key when ready...”);
Console.ReadKey();
}
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