Unity constructor injection with MVVM not working as expected
I have one scenario where i want to create object of my injection when i do login but i am bit unaware about cycle my service module where my dependency injection mapping defined is called after my LoginViewModel calls.
due to this my _Service object is initially null because ConfigureModuleCatalog calls after my LoginViewModel calls.
How can i correct this..actually i don't want to use new Service() if my object is null.
I am using below code for this
LoginViewModel
private readonly IService _Service;
public LoginViewModel(IService Service=null) //Also i want to make this innjection optional so i set it to NULL
{
_Service = Service;
}
private void MethodWhereIWantToUseService()
{
//_service is coming NULL because configuration or mapping of injection calls after this
_Service.MYMethod();
}
ServiceModule
public class ServicesModule : IModule
{
public void Initialize()
{
var container = ServiceLocator.Current.GetInstance<IUnityContainer>();
container.RegisterType<IService, Service>();
}
}
Bootstrapper i.e. where my module is configured
public class Bootstrapper : UnityBootstrapper
{
protected override void ConfigureModuleCatalog()
{
base.ConfigureModuleCatalog();
ModuleCatalog catalog = (ModuleCatalog)this.ModuleCatalog;
catalog.AddModule(typeof(ServicesModule));
}
}
c# asp.net wpf mvvm unity-container
edited Nov 16 '18 at 6:28
FCin
2,65621128
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
add a comment |
I have one scenario where i want to create object of my injection when i do login but i am bit unaware about cycle my service module where my dependency injection mapping defined is called after my LoginViewModel calls.
due to this my _Service object is initially null because ConfigureModuleCatalog calls after my LoginViewModel calls.
How can i correct this..actually i don't want to use new Service() if my object is null.
I am using below code for this
LoginViewModel
private readonly IService _Service;
public LoginViewModel(IService Service=null) //Also i want to make this innjection optional so i set it to NULL
{
_Service = Service;
}
private void MethodWhereIWantToUseService()
{
//_service is coming NULL because configuration or mapping of injection calls after this
_Service.MYMethod();
}
ServiceModule
public class ServicesModule : IModule
{
public void Initialize()
{
var container = ServiceLocator.Current.GetInstance<IUnityContainer>();
container.RegisterType<IService, Service>();
}
}
Bootstrapper i.e. where my module is configured
public class Bootstrapper : UnityBootstrapper
{
protected override void ConfigureModuleCatalog()
{
base.ConfigureModuleCatalog();
ModuleCatalog catalog = (ModuleCatalog)this.ModuleCatalog;
catalog.AddModule(typeof(ServicesModule));
}
}
c# asp.net wpf mvvm unity-container
edited Nov 16 '18 at 6:28
FCin
2,65621128
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
Where do you call your bootstrapper?
– grek40
Nov 16 '18 at 6:35
@grek40 when i do login i call bootstraper.run i.e. in App.xaml.cs "onstartup"
– mswebappdev
Nov 16 '18 at 6:43
How do you create yourLoginViewModel?
– grek40
Nov 16 '18 at 7:11
add a comment |
I have one scenario where i want to create object of my injection when i do login but i am bit unaware about cycle my service module where my dependency injection mapping defined is called after my LoginViewModel calls.
due to this my _Service object is initially null because ConfigureModuleCatalog calls after my LoginViewModel calls.
How can i correct this..actually i don't want to use new Service() if my object is null.
I am using below code for this
LoginViewModel
private readonly IService _Service;
public LoginViewModel(IService Service=null) //Also i want to make this innjection optional so i set it to NULL
{
_Service = Service;
}
private void MethodWhereIWantToUseService()
{
//_service is coming NULL because configuration or mapping of injection calls after this
_Service.MYMethod();
}
ServiceModule
public class ServicesModule : IModule
{
public void Initialize()
{
var container = ServiceLocator.Current.GetInstance<IUnityContainer>();
container.RegisterType<IService, Service>();
}
}
Bootstrapper i.e. where my module is configured
public class Bootstrapper : UnityBootstrapper
{
protected override void ConfigureModuleCatalog()
{
base.ConfigureModuleCatalog();
ModuleCatalog catalog = (ModuleCatalog)this.ModuleCatalog;
catalog.AddModule(typeof(ServicesModule));
}
}
c# asp.net wpf mvvm unity-container
edited Nov 16 '18 at 6:28
FCin
2,65621128
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
I have one scenario where i want to create object of my injection when i do login but i am bit unaware about cycle my service module where my dependency injection mapping defined is called after my LoginViewModel calls.
due to this my _Service object is initially null because ConfigureModuleCatalog calls after my LoginViewModel calls.
How can i correct this..actually i don't want to use new Service() if my object is null.
I am using below code for this
LoginViewModel
private readonly IService _Service;
public LoginViewModel(IService Service=null) //Also i want to make this innjection optional so i set it to NULL
{
_Service = Service;
}
private void MethodWhereIWantToUseService()
{
//_service is coming NULL because configuration or mapping of injection calls after this
_Service.MYMethod();
}
ServiceModule
public class ServicesModule : IModule
{
public void Initialize()
{
var container = ServiceLocator.Current.GetInstance<IUnityContainer>();
container.RegisterType<IService, Service>();
}
}
Bootstrapper i.e. where my module is configured
public class Bootstrapper : UnityBootstrapper
{
protected override void ConfigureModuleCatalog()
{
base.ConfigureModuleCatalog();
ModuleCatalog catalog = (ModuleCatalog)this.ModuleCatalog;
catalog.AddModule(typeof(ServicesModule));
}
}
c# asp.net wpf mvvm unity-container
c# asp.net wpf mvvm unity-container
edited Nov 16 '18 at 6:28
FCin
2,65621128
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
edited Nov 16 '18 at 6:28
FCin
2,65621128
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
edited Nov 16 '18 at 6:28
FCin
2,65621128
edited Nov 16 '18 at 6:28
FCin
2,65621128
edited Nov 16 '18 at 6:28
FCin
2,65621128
2,65621128
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
asked Nov 16 '18 at 6:17
mswebappdevmswebappdev
164
164
Where do you call your bootstrapper?
– grek40
Nov 16 '18 at 6:35
@grek40 when i do login i call bootstraper.run i.e. in App.xaml.cs "onstartup"
– mswebappdev
Nov 16 '18 at 6:43
How do you create yourLoginViewModel?
– grek40
Nov 16 '18 at 7:11
add a comment |
Where do you call your bootstrapper?
– grek40
Nov 16 '18 at 6:35
@grek40 when i do login i call bootstraper.run i.e. in App.xaml.cs "onstartup"
– mswebappdev
Nov 16 '18 at 6:43
How do you create yourLoginViewModel?
– grek40
Nov 16 '18 at 7:11
Where do you call your bootstrapper?
– grek40
Nov 16 '18 at 6:35
Where do you call your bootstrapper?
– grek40
Nov 16 '18 at 6:35
@grek40 when i do login i call bootstraper.run i.e. in App.xaml.cs "onstartup"
– mswebappdev
Nov 16 '18 at 6:43
@grek40 when i do login i call bootstraper.run i.e. in App.xaml.cs "onstartup"
– mswebappdev
Nov 16 '18 at 6:43
How do you create your
LoginViewModel?– grek40
Nov 16 '18 at 7:11
How do you create your
LoginViewModel?– grek40
Nov 16 '18 at 7:11
add a comment |
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Where do you call your bootstrapper?
– grek40
Nov 16 '18 at 6:35
@grek40 when i do login i call bootstraper.run i.e. in App.xaml.cs "onstartup"
– mswebappdev
Nov 16 '18 at 6:43
How do you create your
LoginViewModel?– grek40
Nov 16 '18 at 7:11