Caliburn.Micro - ShowDialog（）如何关闭对话框？

Question

EDIT:

New Information, just managed to get a logger working (I honestly had no idea cm had one!) and i'm given this message when attempting to use TryClose() .

TryClose requires a parent IConductor or a view with a Close method or IsOpen property

I have been stuck on this for a number of days now, and research has turned up zero, I tried posting a question previously about this issue but it received no answers so i assume I didn't word it correctly.

I have a view and viewmodel ContentView/Model which has the following code in them:

ContentView :

<MenuItem Header="New Project" x:Name="OpenProject" cal:Message.Attach="[Event Click] = [Action NewProject()]"/>

ContentViewModel :

public void NewProject()
    {
        NewProjectViewModel viewModel = new NewProjectViewModel(_projectManager);
        _windowManager.ShowWindow(viewModel);
        //If the result is true, we have a new project, otherwise they cancelled the window.
        if (viewModel.Result)
        {
            Project newP = new Project(0, viewModel.ProjectNo, viewModel.ProjectName, 0, 0);
            _projectManager.Insert(newP);
        }
    }

and the viewmodel NewProjectViewModel has the following:

 public void Create()
    {
        this.Result = true;
        TryClose(true);
    }

which is called in the same was as previously using an message.attach on the OK button of the dialog.

However the issue is that TryClose() always fails to close the dialog, and as i don't have the source of caliburn.micro i can't debug inside TryClose() however doing (GetView() As Window).Close() also fails because GetView() always returns null.

I'm at a complete loss as to how i can close this dialog, so any help or suggestions would be greatly appreciated.

EDIT: Since i seem to be getting no answers on this, where as previous questions do, I'll assume i have information missing. In an attempt to understand the issue i think it may have something to with using the view first approach.

In the NewProjectView i have the following:

             xmlns:cal="http://www.caliburnproject.org"
         cal:Bind.Model="ShippingClient.ViewModels.NewProjectViewModel"

This is used to bind the viewmodel rather than the automatic way that is usually used, perhaps this is why GetView() returns null?

Answer 1

You are going to absolutely kick yourself:

Remove the cal:Bind.Model and cal:View.Model bindings...

If you are working ViewModel-First (ie you are creating a viewmodel and showing it using WindowManager or in a conductor) all the binding stuff that glues the viewmodel to the view is done for you by CM.

In this case you shouldn't use any View-First bindings. What you are essentially doing is newing up another instance of your VM and binding that to your view... so you have two viewmodels in the background, one wired up nicely but not bound any more, and a non-wired up instance which is bound to your view but doesn't know about the conductor.

Just remove any bindings to the viewmodel in your view and it will all work!