patterns & practices - Unity

NEW POST: Is there a Lab for a web application

yazidarezki — Fri, 09 May 2008 12:38:53 GMT

Alexander,

Thanks for the links I had seen them before, the problem with both links is that there is no code to download, I tried to get David Hayden's code to work but failed.

Cheers
Yaz

NEW POST: Is there a Lab for a web application

alexanderQX — Fri, 09 May 2008 12:21:26 GMT

Hey Yaz,

David Hayden did some good screen casts on his blog which may help you to move forward, see the link below
http://www.pnpguidance.net/Category/Unity.aspx

Also Chris did some good explanation in article of “Using Unity and the ASP.NET MVC Preview 2” which you can find at the link
http://www.tavaresstudios.com/Blog/post/Using-Unity-and-the-ASPNET-MVC-Preview-2.aspx

Regards,
Alexander

NEW POST: Unity and Singleton

alexanderQX — Fri, 09 May 2008 12:01:51 GMT

Hey Alex,

Not exactly sure what you are asking, but should take a look of following Unity help file sections:

System Design When Using a Dependency Injection Container
Setting up the Unity Container

You can download this help file Unity Application Blocks 1.0 Help.chm from Unity 1.0 Release.

If you can give a bit more explanation for your DI purpose it would be easier to answer, anyhow hope above helps…

Regards,
Alexander

NEW POST: Unity and Singleton

hnchan — Fri, 09 May 2008 09:22:19 GMT

Hi All

If we have unity to do the DI, do we still need to make it to be singleton?

Regards
Alex

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

hnchan — Fri, 09 May 2008 05:21:55 GMT

ctavares wrote:
Which DependencyAttribute are you using: Microsoft.Practices.Unity.DependencyAttribute or Microsoft.Practices.Objectbuilder2.DependencyAttribute?

Please check your using statements in the definition of UserService and make sure you're using the one from Unity, not OB2.

The OB2 one will be removed in Unity 1.1 for precisely this reason.

It uses Microsoft.Practices.Unity.DependencyAttribute but still not work.

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

ctavares — Fri, 09 May 2008 05:05:13 GMT

Which DependencyAttribute are you using: Microsoft.Practices.Unity.DependencyAttribute or Microsoft.Practices.Objectbuilder2.DependencyAttribute?

Please check your using statements in the definition of UserService and make sure you're using the one from Unity, not OB2.

The OB2 one will be removed in Unity 1.1 for precisely this reason.

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

hnchan — Fri, 09 May 2008 03:58:48 GMT

ctavares wrote:
How are you hooking into the MVC framework? What does your container.Resolve call look like, and where is it called.

I've used Unity with MVC lots of times, and all the injection methods worked for me. I suspect the issue is in the plumbing of how you've hooked up Unity and MVC.

I use the approach from David Hayden and code it under Application_Start as follows :-

protected void Application_Start(object sender, EventArgs e)
{
IUnityContainer container = new UnityContainer()
.RegisterType<IUserService, UserService>();

UnityControllerFactory factory = new UnityControllerFactory(container);

ControllerBuilder.Current.SetControllerFactory(factory);

RegisterRoutes(RouteTable.Routes);

}

It works for Constructor Injection but not Property(Setter) Injection.

NEW POST: Generic Decorator Chain Resolution Problem

ctavares — Thu, 08 May 2008 23:04:46 GMT

Sorry it took so long to get back to you, busy, busy busy.

I've repro'ed the issue; I'll let you know when I have more information.

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

ctavares — Thu, 08 May 2008 20:24:33 GMT

How are you hooking into the MVC framework? What does your container.Resolve call look like, and where is it called.

I've used Unity with MVC lots of times, and all the injection methods worked for me. I suspect the issue is in the plumbing of how you've hooked up Unity and MVC.

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

yazidarezki — Thu, 08 May 2008 14:08:18 GMT

Try this code:

 
public class UserService
    {
        public string MyName;
    }
    public class HomeController
    {
        private UserService _userService;
        [Dependency]
        public UserService UserService
        {
            get { return _userService; }
            set { _userService = value; }
        }
        public HomeController(UserService userService)
        {
            _userService = userService;
        }
    }
 
[TestMethod]
        public void MyTest()
        {
            IUnityContainer container = new UnityContainer();
            container.RegisterType<UserService, UserService>();
            
            HomeController controller = container.Resolve<HomeController>();
 
            Assert.IsNotNull(controller);
 
 
            Assert.IsNotNull(controller.UserService);
 
        }

Cheers
Yaz

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

hnchan — Thu, 08 May 2008 13:28:01 GMT

It is very simple.

private UserService _userservice;

Dependency
private UserService UserService
{
get { return _userservice; }
set { _userservice = value; }
}

This won't work and return NULL. How could I solve it? It seems it don't get the object from unity.

BTW, "System.StackOverflowException was unhandled." is my problem. it is a typo.

private UserService _userservice;

public HomeController(UserService userservice)
{
_userservice = userservice;
}

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

yazidarezki — Thu, 08 May 2008 11:53:42 GMT

Can you post the code you used?

NEW POST: Unity and MVC (Constructor Injection, Property Injection)

hnchan — Thu, 08 May 2008 11:37:50 GMT

Is the Unity Framework only support Constructor Injection with MVC?

I have tried property (setter) injection. It seems not work and following error is occurred.

"System.StackOverflowException was unhandled."

NEW POST: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration

sanchaykulkarni — Thu, 08 May 2008 10:31:37 GMT

Yes, the settings are same as mentioned above.
I even tried deleting all Unity dlls and config file from bin folder, and they were again copied when I executed the appilcation.

There is something else tricky here!!!!

UPDATE:
I created a new console application, and its working there!!!!!!!!

I am confused.

NEW POST: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration

yazidarezki — Thu, 08 May 2008 09:49:38 GMT

I do not have the Unity assemblies in the GAC and it works for me.

Sorry that I am going to ask you some silly questions.

You have a test project or console application and some code and MyFile.config. In the properties for the MyFile.config file, you have Copy to output directory, is this set to Copy always?

Cheers
Yaz

NEW POST: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration

sanchaykulkarni — Thu, 08 May 2008 08:52:17 GMT

Yes, it is there. Default project output is not changed, hence its in C:\Projects\bin folder.

Another thought:
As per my knowledge, Unity assemblies need not be put into the GAC, as long as they are available in the execution folder. So is this related to GAC in any way?

NEW POST: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration

yazidarezki — Thu, 08 May 2008 08:06:12 GMT

Hello,

I have tried with the full path and it works for me, one question for yoy. Is the DLL that runs the code in C:\projects\bin folder?

Cheers
Yaz

NEW POST: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration

sanchaykulkarni — Thu, 08 May 2008 05:49:39 GMT

pbolduc :

1. Do you have a reference to Microsoft.Practices.Unity.Configuration.dll ? I would think so since code wouldn't compile.
Yes, Microsoft.Practices.Unity.Configuration.dll, Microsoft.Practices.ObjectBuilder2.dll, Microsoft.Practices.Unity.dll are referred in the project.
2. Are attempting to run this from a unit test or somewhere else where your application base (ie working directory) would be different than C:\Projects\bin ?
Working directory is same.
3. Is Microsoft.Practices.Unity.Configuration.dll in C:\Projects\bin ?
All the 3 files along with the config file are in the above folder.

---------
Yaz:

ExeConfigurationFileMap map = new ExeConfigurationFileMap();
map.ExeConfigFilename = "MyFile.config";//This line of code can't find the file "MyFile.config", as the current dir. is by default set to "MyDocuments" folder.
System.Configuration.Configuration config
= ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);
UnityConfigurationSection cs = (UnityConfigurationSection) config.GetSection("unity");

NEW POST: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration

yazidarezki — Wed, 07 May 2008 23:05:27 GMT

Hello,

I tried this code and it worked

ExeConfigurationFileMap map = new ExeConfigurationFileMap();
map.ExeConfigFilename = "MyFile.config";
System.Configuration.Configuration config
= ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);
UnityConfigurationSection cs = (UnityConfigurationSection) config.GetSection("unity");

Cheers
Yaz

NEW POST: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration

pbolduc — Wed, 07 May 2008 22:25:36 GMT

I have a few questions for you.

Do you have a reference to Microsoft.Practices.Unity.Configuration.dll ? I would think so since code wouldn't compile.
Are attempting to run this from a unit test or somewhere else where your application base (ie working directory) would be different than C:\Projects\bin ?
Is Microsoft.Practices.Unity.Configuration.dll in C:\Projects\bin ?

sanchaykulkarni wrote:
Hi,

I am getting the error
"An error occurred creating the configuration section handler for unity: Could not load file or assembly 'Microsoft.Practices.Unity.Configuration, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. (C:\Projects\bin\MyFile.config line 4)"

The config file is
---
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="unity"
type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,
Microsoft.Practices.Unity.Configuration, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</configSections>
<unity>
<containers>
---

code used is

ExeConfigurationFileMap map = new ExeConfigurationFileMap();
map.ExeConfigFilename = "C:\Projects\bin\MyFile.config";
System.Configuration.Configuration config
= ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);
UnityConfigurationSection section = new UnityConfigurationSection();
ConfigurationSection cs = config.GetSection("unity");

The last line gives error.