在COM挂起AutoCAD中保存(SaveAs in COM hanging AutoCAD)

 我正在实现一个在AutoCAD的ObjectARX界面中使用COM来自动执行绘图操作的应用程序，例如open和save as。 
 
 根据文档，我应该能够调用AcadDocument.SaveAs（）并传入文件名，“另存为类型”和安全参数。 文档明确声明如果安全性为NULL，则不会尝试与安全性相关的操作。 但是，它不会指示要传递的正确对象类型作为“另存为类型”参数。 
 
 我尝试使用文件名调用SaveAs并为其余参数调用null，但我的应用程序挂起该方法调用并且AutoCAD似乎崩溃 - 您仍然可以使用功能区但无法对工具栏执行任何操作且无法关闭AutoCAD的。 
 
 我有一种感觉，这是我的NULL参数导致悲伤，但COM / VBA部门严重缺乏文档。 实际上它说AcadDocument类甚至没有SaveAs方法，它显然也是如此。 
 
 这里有没有人实现同样的事情？ 任何指导？ 
 
 另一种方法是使用SendCommand（）方法发送_SAVEAS命令，但我的应用程序正在管理一批绘图，需要知道a）如果保存失败，b）保存完成时（我正在做的）收听EndSave事件。） 
 
 编辑 
 
 这是所要求的代码 - 它所做的只是启动AutoCAD（或连接到正在运行的运行实例），打开现有图形，然后将文档保存到新位置（C：\ Scratch \ Document01B.dwg。） 
 
using (AutoCad cad = AutoCad.Instance)
{
    // Launch AutoCAD
    cad.Launch();

    // Open drawing
    cad.OpenDrawing(@"C:\Scratch\Drawing01.dwg");

    // Save it
    cad.SaveAs(@"C:\Scratch\Drawing01B.dwg");
}
 
 然后在我的AutoCad类中（this._acadDocument是AcadDocument类的一个实例。） 
 
public void Launch()
{
    this._acadApplication = null;
    const string ProgramId = "AutoCAD.Application.18";

    try
    {
        // Connect to a running instance
        this._acadApplication = (AcadApplication)Marshal.GetActiveObject(ProgramId);
    }
    catch (COMException)
    {
        /* No instance running, launch one */

        try
        {
            this._acadApplication = (AcadApplication)Activator.CreateInstance(
                Type.GetTypeFromProgID(ProgramId), 
                true);
        }
        catch (COMException exception)
        {
            // Failed - is AutoCAD installed?
            throw new AutoCadNotFoundException(exception);
        }
    }

    /* Listen for the events we need and make the application visible */
    this._acadApplication.BeginOpen += this.OnAcadBeginOpen;
    this._acadApplication.BeginSave += this.OnAcadBeginSave;
    this._acadApplication.EndOpen += this.OnAcadEndOpen;
    this._acadApplication.EndSave += this.OnAcadEndSave;

#if DEBUG
    this._acadApplication.Visible = true;
#else
    this._acadApplication.Visible = false;
#endif

    // Get the active document
    this._acadDocument = this._acadApplication.ActiveDocument;
}

public void OpenDrawing(string path)
{
    // Request AutoCAD to open the document
    this._acadApplication.Documents.Open(path, false, null);

    // Update our reference to the new document
    this._acadDocument = this._acadApplication.ActiveDocument;
}

public void SaveAs(string fullPath)
{
    this._acadDocument.SaveAs(fullPath, null, null);
}

I'm implementing an application which uses COM in AutoCAD's ObjectARX interface to automate drawing actions, such as open and save as.
 
According to the documentation, I should be able to call AcadDocument.SaveAs() and pass in a filename, a "save as type" and a security parameter. The documentation explicitly statses that if security is NULL, no security related operation is attempted. It doesn't, however, give any indication of the correct object type to pass as the "save as type" parameter.
 
I've tried calling SaveAs with a filename and null for the remaining arguments, but my application hangs on that method call and AutoCAD appears to crash - you can still use the ribbon but can't do anything with the toolbar and can't close AutoCAD.
 
I've got a feeling that it's my NULL parameters causing grief here, but the documentation is severely lacking in the COM/VBA department. In fact it says the AcadDocument class doesn't even have a SaveAs method, which it clearly does.
 
Has anyone here implemented the same thing? Any guidance?
 
The alternative is I use the SendCommand() method to send a _SAVEAS command, but my application is managing a batch of drawing and needs to know a) if the save fails, and b) when the save completes (which I'm doing by listening to the EndSave event.)
 
EDIT
 
Here's the code as requested - all it's doing is launching AutoCAD (or connecting to the running instance if it's already running), opening an existing drawing, then saving the document to a new location (C:\Scratch\Document01B.dwg.)
 
using (AutoCad cad = AutoCad.Instance)
{
    // Launch AutoCAD
    cad.Launch();

    // Open drawing
    cad.OpenDrawing(@"C:\Scratch\Drawing01.dwg");

    // Save it
    cad.SaveAs(@"C:\Scratch\Drawing01B.dwg");
}
 
Then in my AutoCad class (this._acadDocument is an instance of the AcadDocument class.)
 
public void Launch()
{
    this._acadApplication = null;
    const string ProgramId = "AutoCAD.Application.18";

    try
    {
        // Connect to a running instance
        this._acadApplication = (AcadApplication)Marshal.GetActiveObject(ProgramId);
    }
    catch (COMException)
    {
        /* No instance running, launch one */

        try
        {
            this._acadApplication = (AcadApplication)Activator.CreateInstance(
                Type.GetTypeFromProgID(ProgramId), 
                true);
        }
        catch (COMException exception)
        {
            // Failed - is AutoCAD installed?
            throw new AutoCadNotFoundException(exception);
        }
    }

    /* Listen for the events we need and make the application visible */
    this._acadApplication.BeginOpen += this.OnAcadBeginOpen;
    this._acadApplication.BeginSave += this.OnAcadBeginSave;
    this._acadApplication.EndOpen += this.OnAcadEndOpen;
    this._acadApplication.EndSave += this.OnAcadEndSave;

#if DEBUG
    this._acadApplication.Visible = true;
#else
    this._acadApplication.Visible = false;
#endif

    // Get the active document
    this._acadDocument = this._acadApplication.ActiveDocument;
}

public void OpenDrawing(string path)
{
    // Request AutoCAD to open the document
    this._acadApplication.Documents.Open(path, false, null);

    // Update our reference to the new document
    this._acadDocument = this._acadApplication.ActiveDocument;
}

public void SaveAs(string fullPath)
{
    this._acadDocument.SaveAs(fullPath, null, null);
}

原文：https://stackoverflow.com/questions/2287864