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Re: WPF MVVM Nested Views Pete O'Hanlon24-Oct-11 6:02 Pete O'Hanlon 24-Oct-11 6:02  Collin Jasnoch wrote: I think you meant parent view (rather than the view model). No, I meant parent viewmodel. Which is why I mentioned "the view" in my post. In other words, I was saying that the interaction is actually between the view models rather than views. Forgive your enemies - it messes with their heads "Mind bleach! Send me mind bleach!" - Nagy Vilmos My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility Re: WPF MVVM Nested Views Kevin Marois24-Oct-11 8:07 Kevin Marois 24-Oct-11 8:07  I just posted a clarification. Thanks Everything makes sense in someone's mind WPF MVVM Nested Views - Clarification Kevin Marois24-Oct-11 8:06 Kevin Marois 24-Oct-11 8:06  Ok, so I have posted an image of a prototype of my app here The blue area is the MainWindow with a data context called MainWindowViewModel. The red is the WelcomeView with a data context called WelcomeViewModel. I want to replace the WelcomeView model with other "inner" views during runtime. Notice that the toolbar and menu are both on the MainWindowView and their commands are bound to properties in the MainWindowViewModel. So when the WelcomeView, or some other inner view's data changes, I want the Save button and menu bar on the MainWindow to become enabled. So, I need to have some way of the 2 viewmodels to "talk" to each other. Hope this helps Thanks Everything makes sense in someone's mind Re: WPF MVVM Nested Views - Clarification SledgeHammer0124-Oct-11 8:23 SledgeHammer01 24-Oct-11 8:23  Oh, OK... I wasn't exactly sure why you wanted to know if a child view property has changed in my original response... was just giving you what you wanted . Now that you have posted more information, I retract my original response and provide you with a new one. 1) normally, views should not know about each other 2) normally toolbar buttons are routed to the ACTIVE view... in your case, what would happen is that the save button would only be enabled if the child view was active. Probably not what you want? Or maybe it is? I.e. if the tree has focus, should the button still be enabled if the view is dirty? I'd probably have the IsDirty bool flag in the main window class and have the child view send a message through messenger and have the main window class subscribe to the "some property has changed" message. You do have a messenger service, right? ... thats a key part of MVVM. Re: WPF MVVM Nested Views - Clarification Kevin Marois24-Oct-11 8:48 Kevin Marois 24-Oct-11 8:48  Well, what's happening now is that the toolbar and menu's Command properties in MainWindowView are bound to a bool property called DataChanged, which is essentially dirty flag. Sounds like you're saying that I shpuld use messaging in the child viewmodels to set this? Everything makes sense in someone's mind Re: WPF MVVM Nested Views - Clarification SledgeHammer0124-Oct-11 8:55 SledgeHammer01 24-Oct-11 8:55  Yeah, so you'd have your main window VM subscribe to a "set dirty flag" message and have the child view send it. That way there is no coupling between the two views and neither knows about each other. Its just a random message that anybody can listen to or send. As I said in my original post though, if your properties are going to change a lot, messenger might be too much overhead. Re: WPF MVVM Nested Views - Clarification Kevin Marois24-Oct-11 8:58 Kevin Marois 24-Oct-11 8:58  I don't think there will be too many property changes, so it may be ok. Someone else in this thread suggested using an Action delegate. I could set it as a property on the child view? What do you think of that? Everything makes sense in someone's mind Re: WPF MVVM Nested Views - Clarification SledgeHammer0124-Oct-11 9:10 SledgeHammer01 24-Oct-11 9:10  Using an action delegate would work of course, but it introduces tight coupling between view models which is a no-no. vmA has to know explicitly about vmB and explicitly subscribe to the event. Messenger doesn't have that problem since its more "anonymous". All your VM is coupled too is the messenger service. And if you are using DependencyInjection that can be a loose coupling as well. Re: WPF MVVM Nested Views - Clarification Kevin Marois25-Oct-11 6:30 Kevin Marois 25-Oct-11 6:30  There's still one issue to solve on this. When a RecentProjects link in the child view is clicked, I need to send a message to the MainWindowViewModel to open the project. But how do I pass the ProjectId as a param? I'm using MVVM Light Toolkit from Galasoft, but I don't know it passing params is an option. Ever done this before? Everything makes sense in someone's mind Re: WPF MVVM Nested Views - Clarification SledgeHammer0125-Oct-11 6:37 SledgeHammer01 25-Oct-11 6:37  I've looked at MVVM Light, but haven't used it specifically. They do have a Messenger service, that I do know. I think you just derive an object from one of their base classes and you can pass whatever data you want. WPF Dynamic Content Kevin Marois20-Oct-11 11:56 Kevin Marois 20-Oct-11 11:56  I want to display some text on a user control that is dynamic in what is says, and also that would have hyperlinks in it. How do I do this? Everything makes sense in someone's mind Re: WPF Dynamic Content SledgeHammer0120-Oct-11 13:27 SledgeHammer01 20-Oct-11 13:27  1) FlowDocument 2) WebBrowser 3) TextBlock using Runs 4) google for WPF LinkLabel control Re: WPF Dynamic Content Kevin Marois20-Oct-11 14:00 Kevin Marois 20-Oct-11 14:00  Actually I just came up with the same idea, I used a flowpanel and a series of lables & hyperlinks. Thanks Everything makes sense in someone's mind Re-validating DataGrid after programmaticallychanging row source jchalfant18-Oct-11 7:50 jchalfant 18-Oct-11 7:50  Validation in Windows Presentation Foundation[^] and http://msdn.microsoft.com/en-us/library/0c899ak8.aspx[^] were both good resources for custom validation rules on a DataGrid, but if I programmatically change values in the row source, the row doesn't re-validate. If I change a cell value by manually editing it, on the other hand, validation will fire. How can I force validation even when the user is not directly manipulating the cell? I have my custom validation rule ValidationStep set to CommittedValue and UpdatedValue. I've also tried BeginEdit and CommitEdit after changes are made. Any thoughts? Re: Re-validating DataGrid after programmaticallychanging row source Mark Salsbery19-Oct-11 6:54 Mark Salsbery 19-Oct-11 6:54  Does the class representing a row of data implement and use the INotifyPropertyChanged interface? Mark Salsbery Microsoft MVP - Visual C++ Re: Re-validating DataGrid after programmaticallychanging row source jchalfant20-Oct-11 5:02 jchalfant 20-Oct-11 5:02  It's an EF ComplexObject using the default auto generated code. It is derived from StructuralObject, which is derived from INotifyPropertyChanging and implements the INotifyPropertyChanged. I checked the Properties I'm changing and they all call the ReportPropertyChanged method after a change occurs. I think this has more to do with the way I'm updating the row source. I'm allowing the user to open a context menu through the ValidationErrorTemplate and select various options. The change occurs in the MenuItem click event. If I change focus to anything in the Window using the mouse, the row will validate. Re: Re-validating DataGrid after programmaticallychanging row source Mark Salsbery20-Oct-11 5:55 Mark Salsbery 20-Oct-11 5:55  The validation system is really for validating user input so there's not an easy provision for validating code-produced data, since that data should be validated by the code anyway. You may find a solution in these... Validation Rules for WPF and C#[^] force a Binding to validate[^] Mark Salsbery Re: Re-validating DataGrid after programmaticallychanging row source jchalfant20-Oct-11 8:45 jchalfant 20-Oct-11 8:45  You're right. I'm not using the validator as intended. There are plenty of things I can do in a cell data template to get my intended functionality. Thanks for the help. It didn't get me to my original goal, but illuminated the error of my ways and saved me time digging for an answer that doesn't exist. ribbon tool bar transoft18-Oct-11 5:13 transoft 18-Oct-11 5:13  Hi, Is there a free ribbon tool bar? Can I use MS office ribbon control in the siverlight apps? Best regards, Re: ribbon tool bar SledgeHammer0118-Oct-11 5:18 SledgeHammer01 18-Oct-11 5:18  There are plenty of free ribbons including one from Microsoft that is going to be a part of .NET 4.5, but you can download it separately for now. Unfortunately, you are going to find that you get what you pay for and that these free ribbons aren't quite as polished and performant as some of the paid ones . If all you are looking for is the actual ribbon itself without any of the supporting UI elements (color themes, scrollbars, ribbon windows, etc) the Microsoft one will do. Re: ribbon tool bar Alisaunder18-Oct-11 5:38 Alisaunder 18-Oct-11 5:38  Here's one I've used. They did an excellent job with it. It has a few minor issues but most all of them can be worked around. http://fluent.codeplex.com/[^] Identify WPF list conrol Items' Automation ID in QTP pal2ashish18-Oct-11 2:28 pal2ashish 18-Oct-11 2:28  Hello Everyone, I am not able to capture Automation ID of ITEMS of ListControls such as Combobox,Listbox ,Listview , TreeView.. in QTP for Automation for WPF project. Can any one tell me how can I get the Automation ID or how can I identify the ITEMS of WPF list controls in QTP Automation TEST since List conrols are being filled dynamically? Regards, Ashish AutomationID to WPF controls pal2ashish14-Oct-11 21:36 pal2ashish 14-Oct-11 21:36  Hello Everyone, My WPF application needs to be automated but I do not have assigned AutomationID property to controls.Its in .NET 3.5 and Its very tedious to assign such unique ID to every control.Application will be Automated by QTP. Is there any short way using which I can assing this unique ID property to all my conrols? or any way to assign AutomationID property to Conrols? Regards, Ashish Parmar Re: AutomationID to WPF controls Abhinav S18-Oct-11 3:32 Abhinav S 18-Oct-11 3:32  See if you can use the control key or name instead. Re: AutomationID to WPF controls pal2ashish18-Oct-11 19:21 pal2ashish 18-Oct-11 19:21  Since the list/Item conrols are being loaded dynamically, I want to know how do i get AutomationID of these Items in QTP? QTP is not able to identify these AutomationID.. For Ex: I have a listview which is loaded from datacontext at run time. I am not able to capture items of Listview in QTP.

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