如何将右键单击断点菜单添加到重新托管的工作流设计器

问题描述

重新托管的工作流设计器的一个缺点是，默认情况下，它不包含严肃的工作流开发所需的许多功能.

A shortcoming of the rehosted workflow designer is that it does not, by default, include many of the features necessary for serious workflow development.

其中最主要的是缺乏本地调试/断点支持.

Chief among these is the lack of native debug/breakpoint support.

网上有一些示例展示了如何启用调试，但我没有找到任何示例，其中包括显示活动的右键单击上下文菜单的断点部分

There are samples online which show how to enable debugging, but I didn't find any which included showing the breakpoint section of the right-click context menu for activities

推荐答案

事实证明，将断点菜单项添加到上下文菜单中相对简单.

It turns out adding the breakpoint menuitems to the context menu is relatively straightforward.

首先，创建一个实现 System.Activities.Presentation.Hosting.ICommandService 的类

First, make a class which implements System.Activities.Presentation.Hosting.ICommandService

public class CommandService : ICommandService
{
    private WorkflowDesigner WorkflowDesigner;

    public CommandService(WorkflowDesigner designer) { this.WorkflowDesigner = designer; }
    public bool CanExecuteCommand(int commandId)
    {
        return true;

    }

    public event EventHandler BreakpointsChanged;
    public event EventHandler ShowPropertiesRequested;

    public void ExecuteCommand(int commandId, Dictionary<string, object> parameters)
    {
        switch (commandId)
        {
            case CommandValues.InsertBreakpoint:
                WorkflowDesigner.Context.Services.GetService<IDesignerDebugView>().UpdateBreakpoint((SourceLocation)parameters["SourceLocation"], (BreakpointTypes)parameters["BreakpointTypes"] | BreakpointTypes.Enabled);
                if (BreakpointsChanged != null)
                    BreakpointsChanged(this, new EventArgs());
                break;
            case CommandValues.DeleteBreakpoint:
                WorkflowDesigner.Context.Services.GetService<IDesignerDebugView>().UpdateBreakpoint((SourceLocation)parameters["SourceLocation"], BreakpointTypes.None);
                if (BreakpointsChanged != null)
                    BreakpointsChanged(this, new EventArgs());
                break;
            case CommandValues.EnableBreakpoint:
                WorkflowDesigner.Context.Services.GetService<IDesignerDebugView>().UpdateBreakpoint((SourceLocation)parameters["SourceLocation"], BreakpointTypes.Enabled | BreakpointTypes.Bounded);
                if (BreakpointsChanged != null)
                    BreakpointsChanged(this, new EventArgs());
                break;
            case CommandValues.DisableBreakpoint:
                WorkflowDesigner.Context.Services.GetService<IDesignerDebugView>().UpdateBreakpoint((SourceLocation)parameters["SourceLocation"], BreakpointTypes.Bounded);
                if (BreakpointsChanged != null)
                    BreakpointsChanged(this, new EventArgs());
                break;
            case CommandValues.ShowProperties:
                if (ShowPropertiesRequested != null)
                    ShowPropertiesRequested(this, new EventArgs());
                break;
        }
    }

    public bool IsCommandSupported(int commandId)
    {
        switch (commandId)
        {
            case CommandValues.ShowProperties:
            case CommandValues.InsertBreakpoint:
            case CommandValues.DeleteBreakpoint:
            case CommandValues.EnableBreakpoint:
            case CommandValues.DisableBreakpoint:
                return true;
            default:
                return false;
        }
    }
}

然后创建它，注册其事件，然后像这样将其发布到您的工作流设计器

Then create it, register for its events, and publish it to your workflow designer like so

CommandService cmdSvc = new CommandService(WorkflowDesigner);
cmdSvc.BreakpointsChanged += CmdSvc_BreakpointsChanged;
cmdSvc.ShowPropertiesRequested+= CmdSvc_ShowPropertiesRequested;
workflowDesigner.Context.Services.Publish<ICommandService>(cmdSvc);

右键单击活动时，将显示用于添加、删除、启用和禁用断点的上下文菜单项.还将有一个属性"上下文项，如果允许隐藏它，您应该执行其命令以显示属性网格

The context menu items for adding, removing, enabling and disabling breakpoints will now by shown when you right-click an activity. There will also be a "Properties" context item whose command you should implement to show the property grid if hiding it is allowed

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