Question about MEFedMVVM
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I go with the last scenario (after Hmmm) except (there is always an except) I would have vm1 (child) deal with it's own data (save to the DB) and tell VM0 that the data was saved. This assumes the database structure reflects the actual data where VM0 is the patient and VM1 is a BP record. VM0 may need to reload the list of BP records when told by VM1 that the record was saved and this would be prompted by the message pump.
Never underestimate the power of human stupidity RAH
Because this is a medical system (and the last system I developed was a medical system!) there may be requirements to save multiple uncommitted changes at one time; In fact in the system I developed, I did exactly what you are suggesting, but used a caching mechanism at the back-end so nothing was finally committed until the consultation was complete. It's amazing how much one can learn posting on CP! I'm in a situation where I am pretty much the sole developer, so don't have minds to bounce ideas off - every day I get home and completely change my MVVM application! :)
___________________________________________ .\\axxx (That's an 'M')
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Don't know about MEF in particular, but how does it construct all the VMs to put 'inside' your main VM - The way I would do it (no Framework) would be to have references to each of the child VMs in my main VM (thus your main VM is truly describing the interaction) The alternative is to use a Controller (or some singleton class) to which every viewModel has a reference, and so can use this to communicate. This allows for better abstraction (e.g. your main VM asks the Controller "save the patient's data, because the Save button command has been raised by my View" The Controller either has direct access to the various data used by the other VMs, or has access to the other VMs from where it can obtain that data (e.g. VMBloodPressure, give me your data...)
___________________________________________ .\\axxx (That's an 'M')
@max thanks i think controler will help me.
WANTED wasim khan(Killed 50 Innocent Buggs, Distroyed 200 Exception, make 5 Project Hostage) any Compnay Hire him will pay 30,000. Best place where u can get him is Sorcim Technologies Murre Road RWP
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I have one main View inside that view i have multiple views(usercontrol) it is basically a Form to get the patient records. Now how i can pass the values of main ViewModel to the Child control ViewModels and then get the value back when user save the Form Main View?
WANTED wasim khan(Killed 50 Innocent Buggs, Distroyed 200 Exception, make 5 Project Hostage) any Compnay Hire him will pay 30,000. Best place where u can get him is Sorcim Technologies Murre Road RWP
Just spitballing here, but this situation is typically handled by the main VM knowing all of it's child VM's. I would probably look at using Reactive Extensions to observe the child VMs from the parent (as they should be firing property changed events when data changes), and the parent VM will react to the changes.
I'm not a stalker, I just know things. Oh by the way, you're out of milk.
Forgive your enemies - it messes with their heads
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Just spitballing here, but this situation is typically handled by the main VM knowing all of it's child VM's. I would probably look at using Reactive Extensions to observe the child VMs from the parent (as they should be firing property changed events when data changes), and the parent VM will react to the changes.
I'm not a stalker, I just know things. Oh by the way, you're out of milk.
Forgive your enemies - it messes with their heads
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Nice ... I've not even heard of Reactive Extensions until I read this post. Thanks Pete! Hope you're well!
Jammer My Blog | Articles | DMon | SampleSort
Rx are really cool. I'm currently doing an article on using them with jQuery. I am well. How are you doing mate?
I'm not a stalker, I just know things. Oh by the way, you're out of milk.
Forgive your enemies - it messes with their heads
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Rx are really cool. I'm currently doing an article on using them with jQuery. I am well. How are you doing mate?
I'm not a stalker, I just know things. Oh by the way, you're out of milk.
Forgive your enemies - it messes with their heads
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Really good thanks fella. V. Busy! I've been and gone solo as a contractor! Pretty scary but going really well so far :-D
Jammer My Blog | Articles | DMon | SampleSort
Good job. Where are you at?
I'm not a stalker, I just know things. Oh by the way, you're out of milk.
Forgive your enemies - it messes with their heads
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Good job. Where are you at?
I'm not a stalker, I just know things. Oh by the way, you're out of milk.
Forgive your enemies - it messes with their heads
I left Occam for 9 months, encountered utter hell at two companies during that time and was then offered work contracting for Occam again. Was a no-brainer although I'm not doing WPF right now, lots of ASP.NET, IIS and SQL. I really want to find a WPF contract after this one ends.
Jammer My Blog | Articles | DMon | SampleSort
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I left Occam for 9 months, encountered utter hell at two companies during that time and was then offered work contracting for Occam again. Was a no-brainer although I'm not doing WPF right now, lots of ASP.NET, IIS and SQL. I really want to find a WPF contract after this one ends.
Jammer My Blog | Articles | DMon | SampleSort
Don't be surprised at the lack of WPF jobs out there... it seems pretty rare to me. I was looking for a new gig cuz I was tiring of my current one and only saw 2 or 3 wpf ads over 6 months. People are still on MFC / Winforms, or just scrapping desktop and going web only. Guess I'll stick around then since I'm 100% WPF now :).
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Don't be surprised at the lack of WPF jobs out there... it seems pretty rare to me. I was looking for a new gig cuz I was tiring of my current one and only saw 2 or 3 wpf ads over 6 months. People are still on MFC / Winforms, or just scrapping desktop and going web only. Guess I'll stick around then since I'm 100% WPF now :).