c# - Visual Studio - 调试时将多行表达式插入监 window 口

Question

在 Visual Studio 中进行调试时，如何将多行表达式插入到监 window 口中，这样每一行就不会被分成单独的无效监视表达式。这真的很令人沮丧，因为我有很多跨越多行的表达式需要观看。请注意，Pin to Source 和 Immediate Window 都不适用于跟踪源代码中多个位置的多个值。

例如

PyFunc1(Py.kw("var1", var1),
        Py.kw("var2", var2))

被破坏为:

PyFunc1(Py.kw("var1", var1),

和

Py.kw("var2", var2))

Answer 1

复制

我不认为这是“按设计”，它只是“开箱即用”不可用。

我同意，使用行终止符而不是新行将多行调用添加到监 window 口会更好:

---

研究

我发现这个类似的问题有一些“解决方法”可供选择: Multi-Line Watch Window in Visual Studio 2010?

我还在 MSDN Forums by a MSFT Engineer 中找到了这条评论:

I’m afraid that it is not supported, we often edit them one by one. Maybe you could submit this feature request: http://visualstudio.uservoice.com/forums/121579-visual-studio

---

推出您自己的 Visual Studio 插件

所以我自己尝试了一下，这绝不是生产代码，但它向您展示了如何去做:

(点击图片放大)

namespace AddinMultiLineWatch
{
public class Connect : IDTExtensibility2, IDTCommandTarget
{
    //ADD THESE MEMBER VARIABLES
    //private DebuggerEvents _debuggerEvents = null;
    //private _dispDebuggerEvents_OnEnterBreakModeEventHandler DebuggerEvents_OnEnterBreakMode;
    private Window _watchWindow = null;
    private CommandEvents _objCommandEvents;
    private bool _isRecursive = false;
    public Connect()
    {
    }

    public void OnConnection(object application, ext_ConnectMode connectMode, object addInInst, ref Array custom)
    {
        _applicationObject = (DTE2)application;
        _addInInstance = (AddIn)addInInst;

        //SET THE MEMBER VARIABLES
        //_debuggerEvents = _applicationObject.Events.DebuggerEvents;
        //_debuggerEvents.OnEnterBreakMode += new _dispDebuggerEvents_OnEnterBreakModeEventHandler(BreakHandler);
        //var watchWindow = _applicationObject.Windows.Item(EnvDTE.Constants.vsWindowKindWatch);
        _objCommandEvents = _applicationObject.Events.CommandEvents;
        _objCommandEvents.BeforeExecute += new _dispCommandEvents_BeforeExecuteEventHandler(BeforeExecute);

        if(connectMode == ext_ConnectMode.ext_cm_UISetup)
        {
            object []contextGUIDS = new object[] { };
            Commands2 commands = (Commands2)_applicationObject.Commands;
            string toolsMenuName = "Tools";

            Microsoft.VisualStudio.CommandBars.CommandBar menuBarCommandBar = ((Microsoft.VisualStudio.CommandBars.CommandBars)_applicationObject.CommandBars)["MenuBar"];
ar:
            CommandBarControl toolsControl = menuBarCommandBar.Controls[toolsMenuName];
            CommandBarPopup toolsPopup = (CommandBarPopup)toolsControl;

            try
            {
                Command command = commands.AddNamedCommand2(_addInInstance, "AddinMultiLineWatch", "AddinMultiLineWatch", "Executes the command for AddinMultiLineWatch", true, 59, ref contextGUIDS, (int)vsCommandStatus.vsCommandStatusSupported+(int)vsCommandStatus.vsCommandStatusEnabled, (int)vsCommandStyle.vsCommandStylePictAndText, vsCommandControlType.vsCommandControlTypeButton);

                if((command != null) && (toolsPopup != null))
                {
                    command.AddControl(toolsPopup.CommandBar, 1);
                }
            }
            catch(System.ArgumentException)
            {
            }
        }
    }

    //ADD THIS METHOD TO INTERCEPT THE DEBUG.ADDWATCH COMMAND
    public void BeforeExecute(string Guid, int ID, object CustomIn, object CustomOut, ref bool CancelDefault)
    {
        EnvDTE.Command objCommand = default(EnvDTE.Command);
        try
        {
            objCommand = _applicationObject.Commands.Item(Guid, ID);
        }
        catch (Exception ex)
        {
        }

        if ((objCommand != null))
        {
            if (objCommand.Name == "Debug.AddWatch")
            {
                //if (_isRecursive) return;
                //_isRecursive = true;
                TextSelection selection = (TextSelection)_applicationObject.ActiveDocument.Selection;
                //TODO make selection goto next semi-colon/Line Terminator...
                var selText = selection.Text;  

                if (string.IsNullOrEmpty(selText)) return;   
                //Only intercept multi-line Add Watch commands                    
                if (selText.Contains(Environment.NewLine))
                {
                  //THE BLACK MAGIC: make it fit in one line! lol
                  selText = selText.Replace(Environment.NewLine, string.Empty);              
                  //THIS CALL IS RECURSIVE, I'LL LEAVE IT TO THE READER AS AN EXERCISE TO SOLVE..
                _applicationObject.ExecuteCommand("Debug.AddWatch", selText);
               }
            }
        }
    }

1. 创建一个新项目 > 其他项目类型 > 可扩展性 > Visual Studio 加载项 > 将其命名为 AddinMultiLineWatch

2. 完成向导

3. 将上面的代码添加到 Connect.cs 类 - 请参阅我的//UPPERCASE 注释以及要添加的内容。

4. 在 TextSelection selection = (TextSelection)_applicationObject.ActiveDocument.Selection; 行上打一个断点；

5. 按 F5 将启动一个新的 VS 实例 > 选择“新建项目”>“控制台应用程序”> 将其命名为 TestMultilineAddWatch

6. 在Console App的program.cs中，指定2行以上的代码调用，并打上断点，如截图所示，eg:

   Add(1,            //Breakpoint here and select both lines
           2);
   }
   
   static int Add(int i, int j)
   {
       return i + j;
   }
   

7. F5 在 TestMultilineAddWatch 解决方案中，当代码控件在断点处停止时 > 选择/突出显示两行 Add(1,\r\n 2) > 右键单击​​ > 添加观看

8. 在 VS IDE 调试上下文菜单中单击 Add Watch 会导致 VS AddinMultiLineWatch 解决方案拦截调用并激活，在断点处暂停....您将在其中看到 将多行代码替换为单行代码的黑魔法发送到监 window 口。

Visual Studio EXEC 命令调用自身使该方法递归，如果您调试它，手动退出递归，您将看到我的屏幕截图中的结果。

调试愉快!