TL54: Natural Interop With Silverlight, Office, And Python In Microsoft Visual C# And Microsoft Visual Basic

1. TL54 TL54: Natural Interop With Silverlight, Office, And Python In Microsoft Visual C# And Microsoft Visual Basic  Alex Turner C# Compiler Program Manager Microsoft Corporation

2. Natural Interop With Diverse Object Models • C# and Visual Basic were designed to work great with .NET’s strongly-typed libraries. • However, there are many other object models out there that rely on specific features from their original target language! C# Visual Basic HTML DOM .NET BCL COM Python Libs

3. HTML DOMExpects Dynamic Dispatch from JScript • JScript: var loc = new VELatLong(latitude, longitude); var pin = map.AddPushpin(loc); pin.SetTitle(title); pin.SetDescription(description); map.SetCenterAndZoom(loc, 7); • C# 3.0 (Silverlight): ScriptObject loc = win.CreateInstance( "VELatLong", latitude, longitude) ScriptObject pin = (ScriptObject)map.Invoke("AddPushpin", loc); pin.Invoke("SetTitle", title); pin.Invoke("SetDescription", description); map.Invoke("SetCenterAndZoom", loc, 7);

4. COMExpects Named & Optional Params from VBA • VBA: • VBA: • Selection.PasteSpecialLink:=True • Selection.PasteSpecialLink:=True • VB.NET: • word.Selection.PasteSpecial(Link:=True) • C# 3.0: • object missing = Type.Missing; • object link = true; • word.Selection.PasteSpecial( • ref missing, ref link, ref missing, • ref missing, ref missing, ref missing, • ref missing);

5. Python LibrariesExpects Dynamic Dispatch from Python • Python: • import random • random.shuffle(items) • C# 3.0: • var source = engine. • CreateScriptSourceFromFile(@"lib\random.py"); • var scope = engine.CreateScope(); • source.Execute(scope); • scope.SetVariable("items", items); • var source1 = engine.CreateScriptSourceFromString( • "random.shuffle(items)"); • source1.Execute(scope);

6. demo SilverlightHTML DOM Interop

7. Natural Interop With HTML DOMIn C# 4.0 • JScript: var loc = new VELatLong(latitude, longitude); var pin = map.AddPushpin(loc); pin.SetTitle(title); pin.SetDescription(description); map.SetCenterAndZoom(loc, 7); • C# 4.0 (Silverlight): dynamic loc = win.New.VELatLong(latitude, longitude) var pin = map.AddPushpin(loc); pin.SetTitle(title); pin.SetDescription(description); map.SetCenterAndZoom(loc, 7);

8. Natural Interop With HTML DOMIn VB 10 • JScript: var loc = new VELatLong(latitude, longitude); var pin = map.AddPushpin(loc); pin.SetTitle(title); pin.SetDescription(description); map.SetCenterAndZoom(loc, 7); • VB 10 (Silverlight): Dim loc As Object = win.New.VELatLong(latitude, longitude) Dim pin = map.AddPushpin(loc) pin.SetTitle(title) pin.SetDescription(description) map.SetCenterAndZoom(loc, 7)

9. demo OfficeCOM Interop

10. Natural Interop With COMIn C# 4.0 • VBA: • Selection.PasteSpecialLink:=True • VB.NET: • word.Selection.PasteSpecial(Link:=True) • C# 4.0: • word.Selection.PasteSpecial(Link: true);

11. demo IronPythonUsing Dynamic Language Libraries

12. Natural Interop With Python LibsIn C# 4.0 • Python: • import random • random.shuffle(items) • C# 4.0: dynamic random = python.UseFile("random.py"); random.shuffle(items);

13. Natural Interop With Python LibsIn VB 10 • Python: • import random • random.shuffle(items) • VB 10: Dim random As Object = python.UseFile("random.py") random.shuffle(items)

14. Natural Interop With Diverse Object Models • C# 4.0 and Visual Basic 10 have added features expected by other object models: • Named/optional parameters and “omit ref” in C# to support COM • Dynamic dispatch in VB and C# to supportthe HTML DOMand Python libraries C# Visual Basic .NET BCL HTML DOM COM Python Libs

15. Online Resources • C# Future Download Page: • http://code.msdn.microsoft.com/csharpfuture • SilverlightStarter project available in the CSharpDynamicSamplesdownload • VB Future Download Page: • http://code.msdn.microsoft.com/vbfuture • IronPython CTP Release: • http://go.microsoft.com/fwlink/?LinkId=129196

16. Related Sessions • Upcoming sessions: • TL12: Future Directions for Microsoft Visual Basic • Paul Vick • Tue 10/28 | 5:15 PM-6:30 PM | 406A • TL57: A Panel on the Future of Programming Languages • G. Bracha, D. Crockford, A. Hejlsberg, E. Meijer, W. Schulte, J. Siek • Wed 10/29 | 10:30 AM-11:45 AM | 403AB • TL16-R: The Future of C# • Anders Hejlsberg • Repeat: Wed 10/29 | 3:00 PM-4:15 PM | 502A • Past sessions to watch online: • TL10: Deep Dive: Dynamic Languages in .NET • Jim Hugunin

17. Evals & Recordings Please fill out your evaluation for this session at: This session will be available as a recording at: www.microsoftpdc.com

18. Q&A Please use the microphones provided

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