Smart Client Software Factory:简单的新建一个界面并显示出来

首先在VS.NET上新建一个Smart Client Software Factory的解决方案.最初自动生成的是一个Source文件夹，然后是一个子文件夹名为Infrastructure

几个Infrastructure(基础设施)项目

Infrastructure.Interface

Infrastructure.Layout

Infrastructure.Library

Infrastructure.Module

还有一个启动项目Shell,Shell下的ShellForm为整个程序的入口点,这个shellForm并不是程序的最终界面，只是一个"壳"，运行时上面的内容是动态加载上去的

研究一下它的代码

Public Sub New() InitializeComponent() _layoutWorkspace.Name = WorkspaceNames.LayoutWorkspace End Sub

WorkspaceNames.LayoutWorkspace 这个workspace的概念是什么，以后再研究

那么要往这个"壳"上加上你自己的View，就要用SCSF的模板先新建一个Module项目，有两种module可以选择，bussiness和functional

• Functional Module -- 只是给其它模块提供一些服务，并不实现一个Use-case，不包含一个WorkItem
• Business Module -- 实现一系列相关的用例，包含WorkItems。

我这里选的是bussiness类型，菜单上面有些选择项，可以选择生成对应的单元测试项目和接口项目。

生成Module项目以后，会生成几个文件夹Constants,Services,Views。另外还有两个类ModuleController,ModuleInitializer

这里先只关注ModuleController这个类，它继承自WorkItemController，WorkItemController是一个什么类呢？它来自Infrastructure.Interface下，看看它的源代码

Imports Microsoft.Practices.CompositeUI Imports SmartClient.Infrastructure.Interface.Services ''' <summary> ''' Base class for a WorkItem controller. ''' </summary> Public MustInherit Class WorkItemController Implements IWorkItemController Private _workItem As WorkItem ''' <summary> ''' Gets or sets the work item. ''' </summary> ''' <value>The work item.</value> <ServiceDependency()> _ Public Property WorkItem() As WorkItem Get Return _workItem End Get Set(ByVal value As WorkItem) _workItem = value End Set End Property Public ReadOnly Property ActionCatalogService() As IActionCatalogService Get Return _workItem.Services.Get(Of IActionCatalogService)() End Get End Property ''' <summary> ''' Creates and shows a smart part on the specified workspace. ''' </summary> ''' <typeparam name="TView">The type of the smart part to create and show.</typeparam> ''' <param name="workspaceName">The name of the workspace in which to show the smart part.</param> ''' <returns>The new smart part instance.</returns> Protected Overridable Function ShowViewInWorkspace(Of TView)(ByVal workspaceName As String) As TView Dim view As TView = WorkItem.SmartParts.AddNew(Of TView)() WorkItem.Workspaces(workspaceName).Show(view) Return view End Function ''' <summary> ''' Shows a specific smart part in the workspace. If a smart part with the specified id ''' is not found in the <see cref="WorkItem.SmartParts"/> collection, a new instance ''' will be created; otherwise, the existing instance will be re used. ''' </summary> ''' <typeparam name="TView">The type of the smart part to show.</typeparam> ''' <param name="viewId">The id of the smart part in the <see cref="WorkItem.SmartParts"/> collection.</param> ''' <param name="workspaceName">The name of the workspace in which to show the smart part.</param> ''' <returns>The smart part instance.</returns> Protected Overridable Function ShowViewInWorkspace(Of TView)(ByVal viewId As String, ByVal workspaceName As String) As TView Dim view As TView If WorkItem.SmartParts.Contains(viewId) Then view = WorkItem.SmartParts.Get(Of TView)(viewId) Else view = WorkItem.SmartParts.AddNew(Of TView)(viewId) End If WorkItem.Workspaces(workspaceName).Show(view) Return view End Function Public Overridable Sub Run() Implements IWorkItemController.Run End Sub End Class

它基本就是在操纵WorkItem和IView这两个对象，这里要搞清几个概念

Workspace是什么?SmartParts是什么?

先看微软官方对SmartParts的解释

Microsoft’s CAB documentation defines a SmartPart as ‘a view of data (in the MVC pattern) such as a control, a Windows Form, or a wizard page

微软的CAB文档中把SmartPart 定义为数据的视图(在MVC模式下) 比如控件，Windows 窗体，向导页

姑且就把它看成是控件吧，或者应该说它是除了容器以外的控件

再看微软官方对Workspace的解释

The components that encapsulate a particular visual layout of controls and SmartParts, such as within tabbed pages

一个特定的组件,封装控制视觉布局与SmartParts,比如"标签页"

从字面上已经能解释,Workspace实际跟我们平时项目中用到的容器控件类似,都是一个承载其它控件的容器

Workspaces are themselves controls that allow other controls to be laid out within them,In particular they are designed to allow SmartParts to be laid out within them.

Workspaces它们自身允许其它的控件放进它们之中,特别是它们被设计为让SmartParts放进它们中.

看，这句话已经说得够明白的了。

Workspaces与普通容器控件的不同就是，它们利用了CAB依赖注入容器(Workitmes)

我们可以在Workspaces集合中用AddNew关键字创建一个Workspace,然而我们并不需要这么做。可以拖放一个Workspace到屏幕,ObjectBuilder 会自动的识别这个Workspace，并把它加入到适当的集合中

Workspace分为好几种，具体可以看以下页面

http://richnewman.wordpress.com/2007/11/24/workspace-types-introduction-to-the-cabscsf-part-17/

具体概念回顾，参考我以前的文章

http://blog.csdn.net/lee576/archive/2011/05/03/6386857.aspx

以OfficeExcel来举例就清楚了,它们在Excel中各自扮演的角色一目了然.

回到主线上来，WorkItem就是业务逻辑，WorkItemController就是业务逻辑控制器啦.它所做的工作很简单，避免View与WorkItem之间的耦合,View不知道WorkItem的存在，WorkItem也不认识View，他们都只与WorkItemController发生耦合.从代码来看,WorkItemController的工作无非就是告诉View,工作在哪个Workspace之下，这就是经典的MVC模式，不是吗?

WorkItem：

A runtime container of the objects and services used by a discrete part of a CAB application. Think of it as a logical sub-process or sub-application. It is the basic unit of software scoping in a CAB application. Your business logic lives in one or moreWorkItems.

英文的头一句解释似乎很抽象，"CAB程序的一个独立部分,用于对象和服务的运行时容器."

说回我们刚刚生成的这个ModuleController类,如果我们想在主窗体中显示我们自己的view怎么做呢?

首先我们在Views文件夹下右键选择SCSF的模板菜单，选择Add View(with presenter)

这里我们给View起名叫Demo,会自动生成三个文件,DemoView.vb,DemoViewPresenter.vb,IDemoView.vb

哈，典型的MVP模式啊!

DemoViewPresenter类继承自Presenter基类,Presenter又干了些什么呢

Imports Microsoft.Practices.CompositeUI Imports System Imports Microsoft.Practices.CompositeUI.SmartParts Public MustInherit Class Presenter(Of TView) Implements IDisposable Private _view As TView Private _workItem As WorkItem Private _disposed As Boolean = False Public Property View() As TView Get Return _view End Get Set(ByVal value As TView) _view = value OnViewSet() End Set End Property <ServiceDependency()> _ Public Property WorkItem() As WorkItem Get Return _workItem End Get Set(ByVal value As WorkItem) _workItem = value End Set End Property Protected Overridable Sub CloseView() Dim locator As Services.IWorkspaceLocatorService = WorkItem.Services.Get(Of Services.IWorkspaceLocatorService)() Dim wks As IWorkspace = locator.FindContainingWorkspace(WorkItem, View) If Not wks Is Nothing Then wks.Close(View) End If End Sub Public Overridable Sub OnViewReady() End Sub Protected Overridable Sub OnViewSet() End Sub Public Overridable Sub OnCloseView() End Sub ''' <summary> ''' See <see cref="System.IDisposable.Dispose"/> for more information. ''' </summary> Public Sub Dispose() Implements IDisposable.Dispose If Not _disposed Then Dispose(True) GC.SuppressFinalize(Me) End If End Sub ''' <summary> ''' Called when the object is being disposed or finalized. ''' </summary> ''' <param name="disposing">True when the object is being disposed (and therefore can ''' access managed members); false when the object is being finalized without first ''' having been disposed (and therefore can only touch unmanaged members).</param> Protected Overridable Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not _workItem Is Nothing Then If Not Me.View Is Nothing Then OnCloseView() _workItem.Items.Remove(Me.View) End If _workItem.Items.Remove(Me) End If End If _disposed = True End Sub End Class

设置当前的Workitem，当前的View，把它们关联起来，然后在View的三个生命周期中放上了三个虚函数，目的是便于在子类中重写达到扩展的目的，这就是事件的支持。最后它还负责析构自身，及移除workitem中的view.为什么要移除view呢？无非是为了释放掉资源，本来View就是动态加上去的。在Close的时候就移除view与workitem的关系。

最后，如果我们要把刚刚新建的Demo加到主窗体中怎么做呢?

回到ModuleController类，写上

Private Sub AddViews() 'TODO: create the Module views, add them to the WorkItem and show them in 'a Workspace. ' To create and add a view you can customize the following sentence ' ShowViewInWorkspace(Of SampleView)(WorkspaceNames.SampleWorkspace) ShowViewInWorkspace(Of DemoView)(WorkspaceNames.LayoutWorkspace) End Sub

这是把View设置到一个Workspace上面，WorkspaceNames.LayoutWorkspace

WorkspaceNames是个自定义的常量类

Public Class WorkspaceNames Public Const LayoutWorkspace As String = "LayoutWorkspace" Public Const ModalWindows As String = "ModalWindows" Public Const LeftWorkspace As String = "LeftWorkspace" Public Const RightWorkspace As String = "RightWorkspace" End Class

Public Const LayoutWorkspace As String = "LayoutWorkspace"

这个相当于是Microsoft.Practices.CompositeUI.WinForms.DeckWorkspace

证据在这里,ShellForm.Designer.vb里面

Private Sub InitializeComponent() Me._layoutWorkspace = New Microsoft.Practices.CompositeUI.WinForms.DeckWorkspace Me.SuspendLayout() ' '_layoutWorkspace ' Me._layoutWorkspace.Dock = System.Windows.Forms.DockStyle.Fill Me._layoutWorkspace.Location = New System.Drawing.Point(0, 0) Me._layoutWorkspace.Name = "_layoutWorkspace" Me._layoutWorkspace.Size = New System.Drawing.Size(698, 516) Me._layoutWorkspace.TabIndex = 0 Me._layoutWorkspace.Text = "_layoutWorkspace" ' 'ShellForm ' Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(698, 516) Me.Controls.Add(Me._layoutWorkspace) Me.Name = "ShellForm" Me.Text = "ShellForm" Me.ResumeLayout(False) End Sub

还有其它几个常量，具体都是在ShowViewInWorkspace里使用，以后再弄清楚细节