 Friday, October 13, 2006
.NET 3.0 Roadshow Slides, Demos, and Links
This week and next my colleagues Juval Lowy and Michele Leroux Bustamante (http://dasblonde.com) and I are conducting a two day seminar on .NET 3.0 development as a roadshow in 6 cities across the country (LA, San Jose, Chicago, DC, New York, and Boston). We have completed LA and San Jose with great feedback from the crowd and are in the middle of the Chicago show.
You can grab the slides and demos for my WF and WPF sessions here: Slides Demos
http://www.softinsight.com/downloads/NET30RoadShow/Slides.zip
http://www.softinsight.com/downloads/NET30RoadShow/democode.zip
In the WPF talk, I demonstrated several apps others have written that do a good job of displaying some of the awesome graphics capabilities of WPF. Those apps can be found through the links below. I also mentioned a great document for getting up to speed on WPF when you know Windows Forms 2.0 capabilities well. That link is below as well.
Enjoy!
Cine.View: A WPF viewing application that exposes the NetFlix catalog and ordering capabilities created by the thirteen23 company. They also have a great viewer for Flickr.
http://www.thirteen23.com/
New York Times Reader: A WPF content application that provides a rich browsing and reading experience for the paper's news content online in a Windows application.
http://firstlook.nytimes.com
Karen Corby's Woodgrove Finance application: This is a WPF XAML Browser application that provides rich visualization of stock market data in a multi-paned WPF app that runs in the browser.
http://scorbs.com/
Keep an eye on http://wpf.netfx3.com for some more upcoming samples that will wow your eyes.
The WPF for Windows Developers document from Mark Boulter and Jessica Fosler can be found on Jessica Fosler's blog:
http://blogs.msdn.com/jfoscoding/articles/765135.aspx
Friday, June 9, 2006
Wednesday, May 24, 2006
I love the smell of fresh hot bits in the morning...
If you haven't stumbled on the top link on the MSDN homepage in the last 24 hours... WinFX Beta 2 is out. Finally some fresh bits that are synced up between WCF, WPF, and WF.
There is also a Go-Live license associated with all the bits, so you can get the jump on the competition by putting apps into production right away with WinFX capabilities. If you haven't started looking at WinFX capabilities yet, now is definitely the time. One good way to do so is to attend our WCF Master Class. You can find more details at http://www.idesign.net/.
You can get all the download bits for WinFX Beta 2 here: http://msdn.microsoft.com/windowsvista/downloads/products/getthebeta/
Tuesday, April 11, 2006
Friday, February 24, 2006
Slides and Demos from Connecting Smart Clients with WCF talk last night - Feb CTP lessons learned
I gave a talk on Connecting Smart Clients at the Microsoft Integration and Connected Systems User Group (MICSUG) last night. I discussed and demoed the basics of using Windows Communication Foundation (WCF) to connect applications, using the newly released Feb CTP.
You can get the slides and demos here: Slides Demos
In jumping through the hoops yesterday to get my demos running on the Feb CTP, there were a number of changes that I had to get used to compared to previous builds.
The biggest is that if you run svcutil against a service that uses wsHttpBinding to generate a proxy, you get a proxy service contract that uses custom message contracts to wrap the parameters and return values from each operation contract. XXXRequest and XXXResponse classes are defined in the proxy file for each operation, along with an XXXBody class that actually contains the raw parameter/DataContract types.
If you program against the service contract interface like so:
IAccountsManager mgrProxy = new AccountsManagerProxy();
You will have to create the XXXRequest message contract types to wrap all the parameters you pass into the methods, and unwrap any return values from the XXXResponse types. However, they also expose a public method on the proxy class directly that encapsulates these details so that you can deal directly with the underlying parameters and return values.
So instead of calling IAccountsManager.GetAllAccounts for example, you will have an easier time calling AccountsManagerProxy.GetAllAccounts.
This is true for wsHttpBinding because of the message level security involved in the default binding. If you use basicHttpBinding, or turn down the security on the wsHttpBinding, then you will get more straightforward service contract interface definitions on the client side proxy.
The resulting proxy and service contract look like the following:
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
[System.ServiceModel.ServiceContractAttribute()]
public interface IAccountsManager
{
// CODEGEN: Generating message contract since message part accountNo requires protection.
[System.ServiceModel.OperationContractAttribute(Action="http://tempuri.org/IAccountsManager/CreateAccount", ReplyAction="http://tempuri.org/IAccountsManager/CreateAccountResponse")]
CreateAccountResponse CreateAccount(CreateAccountRequest request);
// CODEGEN: Generating message contract since message part GetAllAccountsResult requires protection.
[System.ServiceModel.OperationContractAttribute(Action="http://tempuri.org/IAccountsManager/GetAllAccounts", ReplyAction="http://tempuri.org/IAccountsManager/GetAllAccountsResponse")]
GetAllAccountsResponse GetAllAccounts(GetAllAccountsRequest request);
// CODEGEN: Generating message contract since message part fromAccountNo requires protection.
[System.ServiceModel.OperationContractAttribute(Action="http://tempuri.org/IAccountsManager/Transfer", ReplyAction="http://tempuri.org/IAccountsManager/TransferResponse")]
TransferResponse Transfer(TransferRequest request);
}
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
public interface IAccountsManagerChannel : IAccountsManager, System.ServiceModel.IClientChannel
{
}
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
public partial class AccountsManagerProxy : System.ServiceModel.ClientBase<IAccountsManager>, IAccountsManager
{
public AccountsManagerProxy()
{
}
public AccountsManagerProxy(string endpointConfigurationName) :
base(endpointConfigurationName)
{
}
public AccountsManagerProxy(string endpointConfigurationName, string remoteAddress) :
base(endpointConfigurationName, remoteAddress)
{
}
public AccountsManagerProxy(string endpointConfigurationName, System.ServiceModel.EndpointAddress remoteAddress) :
base(endpointConfigurationName, remoteAddress)
{
}
public AccountsManagerProxy(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress remoteAddress) :
base(binding, remoteAddress)
{
}
CreateAccountResponse IAccountsManager.CreateAccount(CreateAccountRequest request)
{
return base.InnerProxy.CreateAccount(request);
}
public void CreateAccount(int accountNo, string name, decimal initialBalance)
{
CreateAccountRequest inValue = new CreateAccountRequest();
inValue.Body = new CreateAccountRequestBody();
inValue.Body.accountNo = accountNo;
inValue.Body.name = name;
inValue.Body.initialBalance = initialBalance;
CreateAccountResponse retVal = ((IAccountsManager)(this)).CreateAccount(inValue);
}
GetAllAccountsResponse IAccountsManager.GetAllAccounts(GetAllAccountsRequest request)
{
return base.InnerProxy.GetAllAccounts(request);
}
public BankingBusinessLayer.Account[] GetAllAccounts()
{
GetAllAccountsRequest inValue = new GetAllAccountsRequest();
inValue.Body = new GetAllAccountsRequestBody();
GetAllAccountsResponse retVal = ((IAccountsManager)(this)).GetAllAccounts(inValue);
return retVal.Body.GetAllAccountsResult;
}
TransferResponse IAccountsManager.Transfer(TransferRequest request)
{
return base.InnerProxy.Transfer(request);
}
public void Transfer(int fromAccountNo, int toAccountNo, decimal amount)
{
TransferRequest inValue = new TransferRequest();
inValue.Body = new TransferRequestBody();
inValue.Body.fromAccountNo = fromAccountNo;
inValue.Body.toAccountNo = toAccountNo;
inValue.Body.amount = amount;
TransferResponse retVal = ((IAccountsManager)(this)).Transfer(inValue);
}
}
Wednesday, February 22, 2006
Thursday, January 19, 2006
Tuesday, November 29, 2005
WCF Config file intellisense... why hath thou forsake me?
In previous builds of WCF (Indigo), you had to have a particular namespace included in your config file. Specifically, instead of the default root element of:
<configuration>
<!-- The rest of your config settings -->
</configuration>
You needed to have:
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<!-- The rest of your config settings -->
</configuration>
By doing that in previous builds, you got intellisense for the schema elements and attributes of the <system.serviceModel> element, letting you discover the right entries to get features like transactions, security, bindings and so on correctly configured.
When I installed the Nov CTP, I was immediately lost because my intellisense seemed to have gone away. If you add a WinFx Service from the Web Site templates, the web.config still has the namespace shown in the second config snippet above. But the trick is that it is no longer needed, and in fact confuses VS on what schema elements to expose through intellisense. The system.serviceModel schema elements are now merged with the C:\Program Files\Microsoft Visual Studio 8\Xml\Schemas\DotNetConfig.xsd schema as part of the VS extenstions install, so they are there by default now in the config file intellisense.
Thanks to my colleague Juval Lowy for discovering this fact and giving me back my intellicrack!
Thursday, November 24, 2005
Slides and demos from Boulder .NET
I gave a talk on connecting smart clients with WCF on Tuesday at Boulder .NET. Had a good turnout desipte the proximity to the holiday and had a good time.
The talk covered the fundamentals of connecting applications with WCF since most of the people there had never seen anything on WCF. Then I moved into some of the specific client concerns when using WCF, similar to my talk at VSConnections.
You can get the slides and demos here: Slides Demos
Tuesday, November 8, 2005
Las Vegas Bound - Impressions of WCF
I'm catching a flight early tomorrow morning to Vegas for VS Connections and am really looking forward to it. VS Connections in particular, and DevConnections in general (the overall conference event) is well run, in great locations, and always has a lot of great content that I can benefit from as well.
I've been spending most of my recent prep time fine tuning the demos for my two WCF sessions, Build Event Driven Applications with Indigo and Connecting Smart Client Applications with Indigo. The more I work with Windows Communications Foundation (aka "Indigo"), I am struck by a number of things:
- I am impressed by how capable Indigo is.
- I am awed by how elegant and simple solutions are to complex aspects like security, transactions, queuing, callbacks, and so on.
- I am dumbfounded by how hard it is to figure out how to get to those elegant and simple solutions.
The last bullet is not really a criticism of what they have come up with, it is just the nature of the beast. I would draw on an analogy from my flying days to explain why this is so. Imagine the cockpit of a WW I fighter aircraft. You probably have half a dozen or less simple dials and gauges, and a stick and throttle. Imagine trying to use that set of controls on an aircraft that can fly at high subsonic speeds at high altitude carrying hundreds of passengers for 12 hour transoceanic flights. Not going to work too well. This is basically where you were at with past technologies to build complex, distributed, heterogenous, connected enterprise systems. It could be done, but the end result was not going to be pretty and it was going to take you a long time to get there.
Now with WCF, it is more like climbing into the cockpit of a 777. There is a technological elegance to everything that is there. But there are still hundreds (if not thousands) of individual switches, controls, displays, electronic gages and dials, menu driven control panels, etc. A great deal of human engineering has gone into everything that is in there so that for any given common task, there are only a couple of relevant controls that you have to touch and put into place to get the job done. The challenge is in knowing which one of those hundreds of knobs and dials to tweak.
The same is true for WCF. Microsoft has created an incredibly powerful and technologically advanced platform that is well adapted to building large distributed enterprise systems. In order to do that, there needs to be hundreds of switches and knobs that you can throw to address different scenarios. The downside to that is bullet number three above - you have to learn which switches and knobs are relevant for a given task, and in what order to throw them.
This is somewhat aggravated right now in that we are only at Beta 1 of WinFx (and its parts WCF, WPF, and WinWF), and the names, shapes, and locations of all the knobs and switches is constantly changing as they work on that human engineering task of trying to make it easier to use. Meanwhile the documentation and samples are seriously lagging, so working with it right now is a little like stepping into that 777 cockpit without any labels on the controls. When you say to yourself, "I just need transactions and certificate based security", it is kind of like saying "I just need to call the flight attendant at the second aft flight station". Simple to describe, but God help you in figuring out which switches and knobs to throw. At least there are not really any destructive ones that you can throw by accident. If you get it wrong, your app may not work, but you would have to go out of your way to write some code that would do bad things when WCF fails to let you communicate.
I'm looking forward to continuing to work with this technology and learn what all those knobs and buttons are for. Learning all the controls of the aft cockpit of the F-14 to run the weapons system, navigation systems, communications systems, and other tasks was one of the funnest things I have done in my life. The fact that we got to do that while strapped to a couple of 50K lb + of thrust zorching through the sky pulling G's and landing on the carrier certainly helped make it interesting. Sitting at a computer leaves a little to be desired in that department, but the learning challenge is still just as fun.
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