[求助]：请教怎样在cad2000中实现多文档的自动转换？

wweien

请教一下各位大侠？怎样实现多文旦转换，就可以在编程时自动的转换，比如把一个程序中的两个图形保存为不同的文件名，并且，可以在cad2000内同时打开？请给我一个实例！不胜感谢！

XDSoft

最初由 wweien 发布
[B]请教一下各位大侠？怎样实现多文旦转换，就可以在编程时自动的转换，比如把一个程序中的两个图形保存为不同的文件名，并且，可以在cad2000内同时打开？请给我一个实例！不胜感谢！ [/B]

问题我想可以归结为一个，就是如何创建一个新文档，然后打开它。

给你贴篇资料：

Method #1
Register your command with ACRX_CMD_SESSION flag and use the
appContextNewDocument API to create the new document. The drawback of this
approach is that your command will be executed in the application context,
therefore, you will need to do explicit document locking if you want to interact
with any documents. Also, you cannot use acedCommand/acedCmd/acedInvoke APIs
from the application context.

Method #2
Register your command with ACRX_CMD_MODAL flag and use the
executeInApplicatonContext API within your command handler to switch the
application context. The drawback of this approach is that you will need to
create a hidden window that coordinates the activation of the newly created
document once the 'creator' command finishes.

上面两个方法的实例代码都在附件中，你下载看看。

wweien

我出赚点钱再来，哈哈

XDSoft

最初由 wweien 发布
[B]我出赚点钱再来，哈哈 [/B]

多参与ARX帖子的讨论吧，开发论坛不应该灌水，你说呢：）

wweien

多谢xdsoft，我下载了，thank you very much!!

wweien

看了你的例子，谢谢。
你的例子中创建新文档主要是：
AcApDocument* pDoc = acDocManager->curDocument();
        //create the new doc
    acDocManager->appContextNewDocument("acad.dwt");
        //get a pointer to it
        *((AcApDocument**)pData) = acDocManager->curDocument();
        //go back to the original doc to finish the command there
        acDocManager->activateDocument(pDoc);       
acDocManager->appContextNewDocument("acad.dwt");
但是我看一本书上的关于多文档的很多是数据库的东西。还重载了文档管理反应器类。AcDbDatabaseReactor。我只需要在程序中能够打开另一个文档而以需要重载吗?这一块我看不太明白，请指教！

XDSoft

最初由 wweien 发布
[B]看了你的例子，谢谢。
你的例子中创建新文档主要是：
AcApDocument* pDoc = acDocManager->curDocument();
        //create the new doc
    acDocManager->appContextNewDocument("acad.dwt");
        //get a pointer to ... [/B]

看看下面的资料，你就应该明白为什么要使用模板图（DWT）了，你可以把你的图形保存后，改扩展名为DWT，并且讲解了为什么要LOCK文档和如何使用定义命令标记，都是由原因的。

2. 
   
3. [FONT=courier new]
   
4. How to create a copy of the current document into a new document?  
   
5. ID    53139  
   
6. Applies to:    AutoCAD 2000
   
7. 
   
8. 
   
9. This document is part of    AcDbDatabase   ObjectARX   Opening Drawings   Wblock     
   
10. 
    
11. 
    
12. Question
    
13. How can I have an identical copy of the current document and create it as a new
    
14. document?
    
15. Answer
    
16. There are two solutions to this problem.
    
17. 
    
18. One solution is detaled in DevNote #50697.
    
19. 
    
20. Another solution is create a temporary drawing template file from the current
    
21. database first, then create a new drawing with the template. Then delete it if
    
22. necessary. Here is an outline of required steps followed by a code fragment.
    
23. 
    
24. 1.  Wblock the current open drawing.
    
25. 2.  Save the wblocked drawing as a template file (with a DWT extension) to a
    
26. temporary location on your hard drive.
    
27. 3. From the application context create a NEW document using the previously saved
    
28. template file.
    
29. 4. If necessary, 'remove' the temporary template file from your hard drive.
    
30. 
    
31. Code fragment:
    
32. void newDocHelper(void *pData);
    
33. 
    
34. // Please note, here we are using "C:/temp.dwt" as a location
    
35. // for our temporary template file. Please change this location
    
36. // to suit your requirements as appropriate.
    
37. void copydwg()
    
38. {
    
39.    // TODO: Implement the command
    
40.    AcDbDatabase *pDb = NULL;
    
41.    AcDbDatabase *pnewDb = NULL;
    
42. 
    
43.    pDb = acdbHostApplicationServices()->workingDatabase();
    
44.    assert( pDb != NULL );
    
45. 
    
46.    if( pDb->wblock(pnewDb) != Acad::eOk ) {
    
47.         acutPrintf("Couldn't wblock.\n");
    
48.         return;
    
49.    }
    
50.    
    
51.    if( pnewDb->saveAs("C:/temp.dwt") != Acad::eOk) {
    
52.         acutPrintf("Couldn't saveAs C:/temp.dwt file.\n");
    
53.         delete pnewDb;
    
54.         return;
    
55.    }
    
56. 
    
57.    delete pnewDb;
    
58. 
    
59.    static char pData[] = "c:/temp.dwt";
    
60.    acDocManager->executeInApplicationContext(newDocHelper, (void *)pData);
    
61. 
    
62.    // 'remove' is a C function to delete a file and its syntax is int remove(
    
63. const char *path );
    
64.    remove("c:/temp.dwt");
    
65. }
    
66. 
    
67. void newDocHelper(void *pData)
    
68. {
    
69.    AcApDocument* pDoc = acDocManager->curDocument();
    
70.    if (acDocManager->isApplicationContext())
    
71.    {
    
72.         acDocManager->appContextNewDocument((const char *)pData);
    
73.    }
    
74.    else
    
75.    {
    
76.         acutPrintf("\nERROR: in Document context : %s\n",pDoc->fileName());
    
77.    }
    
78. }
    
79. NOTE: Do not register this command with flag 'ACRX_CMD_SESSION' because
    
80. AcDbDatabase::wblock() will fail in this context. As for how to execute a NEW or
    
81. OPEN functionality in an ARX command running either in application context or
    
82. document context, refer to DevNote #32094.
    
83. [/FONT]

<br /> [FONT=courier new]<br /> How to create a copy of the current document into a new document?  <br /> ID    53139  <br /> Applies to:    AutoCAD 2000<br /> <br /> <br /> This document is part of    AcDbDatabase   ObjectARX   Opening Drawings   Wblock     <br /> <br /> <br /> Question <br /> How can I have an identical copy of the current document and create it as a new<br /> document?<br /> Answer <br /> There are two solutions to this problem.<br /> <br /> One solution is detaled in DevNote #50697.<br /> <br /> Another solution is create a temporary drawing template file from the current<br /> database first, then create a new drawing with the template. Then delete it if<br /> necessary. Here is an outline of required steps followed by a code fragment.<br /> <br /> 1.  Wblock the current open drawing.<br /> 2.  Save the wblocked drawing as a template file (with a DWT extension) to a<br /> temporary location on your hard drive.<br /> 3. From the application context create a NEW document using the previously saved<br /> template file.<br /> 4. If necessary, 'remove' the temporary template file from your hard drive.<br /> <br /> Code fragment:<br /> void newDocHelper(void *pData);<br /> <br /> // Please note, here we are using "C:/temp.dwt" as a location <br /> // for our temporary template file. Please change this location <br /> // to suit your requirements as appropriate.<br /> void copydwg()<br /> {<br />    // TODO: Implement the command<br />    AcDbDatabase *pDb = NULL;<br />    AcDbDatabase *pnewDb = NULL;<br /> <br />    pDb = acdbHostApplicationServices()->workingDatabase();<br />    assert( pDb != NULL );<br /> <br />    if( pDb->wblock(pnewDb) != Acad::eOk ) {<br />         acutPrintf("Couldn't wblock.\n");<br />         return;<br />    } <br />    <br />    if( pnewDb->saveAs("C:/temp.dwt") != Acad::eOk) {<br />         acutPrintf("Couldn't saveAs C:/temp.dwt file.\n");<br />         delete pnewDb;<br />         return;<br />    }<br /> <br />    delete pnewDb;<br /> <br />    static char pData[] = "c:/temp.dwt";<br />    acDocManager->executeInApplicationContext(newDocHelper, (void *)pData);<br /> <br />    // 'remove' is a C function to delete a file and its syntax is int remove(<br /> const char *path );<br />    remove("c:/temp.dwt");<br /> }<br /> <br /> void newDocHelper(void *pData)<br /> {<br />    AcApDocument* pDoc = acDocManager->curDocument();<br />    if (acDocManager->isApplicationContext())<br />    {<br />         acDocManager->appContextNewDocument((const char *)pData);<br />    }<br />    else<br />    {<br />         acutPrintf("\nERROR: in Document context : %s\n",pDoc->fileName());<br />    }<br /> }<br /> NOTE: Do not register this command with flag 'ACRX_CMD_SESSION' because<br /> AcDbDatabase::wblock() will fail in this context. As for how to execute a NEW or<br /> OPEN functionality in an ARX command running either in application context or<br /> document context, refer to DevNote #32094.<br /> [/FONT]

wweien

i am a newer.can you tell me the means of DevNote#32094?and how can i find it?
thank you

XDSoft

最初由 wweien 发布
[B]i am a newer.can you tell me the means of DevNote#32094?and how can i find it?
thank you [/B]

那是ADN开发资料的一个文件，下面资料是在2000下定义一个等价于acedsyncfileopen 打开文件功能的命令。

1. 
   
2. [FONT=courier new]
   
3. What is the equivalent of acedsyncfileopen in AutoCAD 2000?  
   
4. ID    32094  
   
5. Applies to:    AutoCAD 2000
   
6. 
   
7. This document is part of   ObjectARX   Opening Drawings   Saving Files   
   
8. 
   
9. 
   
10. Question
    
11. What is the equivalent function to acedSyncFileOpen in AutoCAD 2000?
    
12. Answer
    
13. The acedSyncFileOpen() function is more relevant to AutoCAD Releases 14 abd
    
14. 14.01than to AutoCAD 2000. ObjectARX in AutoCAD 14 can have only one database
    
15. open and be available to the AutoCAD editor.  
    
16. 
    
17. The situation is different in AutoCAD 2000 because the program is a Multiple
    
18. Document Environment. As a result, there are two ways you can open a drawing
    
19. file. These two ways are:
    
20. 
    
21. Method #1
    
22. Create a command to execute in the application context by registering the
    
23. command with ACRX_CMD_SESSION and calling 'appContextOpenDocument()' on the
    
24. particular drawing file you want to open.
    
25. 
    
26. Method #2
    
27. Explicitly make a function execute in the application context by making a call
    
28. to 'AcApDocManager::executeInApplicationContext()', then pass the address of a
    
29. function that you want to execute and any optional data that the invoked
    
30. function can use.
    
31. 
    
32. NOTE: If you are unfamiliar with the term "application context",  read Chapter
    
33. 16, "The Multiple Document Interface" in the ObjectARX Developers Guide for
    
34. AutoCAD 2000.
    
35. 
    
36. Consider the following:
    
37. acedRegCmds->addCommand("DCG_GROUP", "OP1", "OP1", ACRX_CMD_SESSION, op1);
    
38. acedRegCmds->addCommand("DCG_GROUP", "OP2", "OP2", ACRX_CMD_MODAL, op2);
    
39. For the first command 'OP1' the command flag is ACRX_CMD_SESSION, which means
    
40. that the command will be executed in the application context. The function that
    
41. is called as a result of entering 'OP1' at the command prompt is 'op1()'. For
    
42. the second command 'OP2', it is a modal command which calls the 'op2()'
    
43. function. Now let's look at these functions:
    
44. 
    
45. The following code omits error-checking and assumes the existence of these three
    
46. drawing files: test1.dwg, test2.dwg, and test3.dwg.
    
47. // This is command 'OP1'
    
48. void op1()
    
49. {
    
50.         // TODO: Implement the command
    
51.         Acad::ErrorStatus es;
    
52. 
    
53.         es = acDocManager->appContextOpenDocument("test1.dwg");
    
54.         es = acDocManager->appContextOpenDocument("test2.dwg");
    
55. }
    
56. In the preceding function 'op1()', we use 'acDocManager', which is a macro that
    
57. will give us a pointer to the AcApDocManager object. We then simply call
    
58. 'appContextOpenDocument()'. This works because the command that calls this
    
59. function is registered with the command flag, ACRX_CMD_SESSION.
    
60. 
    
61. In the following function, a call is made to 'executeInApplicationContext()', to
    
62. which a function pointer and a data string 'pData' is passed that names the
    
63. drawing to be opened.
    
64. 
    
65. The function 'openDocHelper()' is then responsible for invoking
    
66. 'appContextOpenDocument()'.
    
67. // This is command 'OP2'
    
68. void op2()
    
69. {
    
70.    // TODO: Implement the command
    
71.    static char pData[] = "test3.dwg";
    
72. 
    
73.    AcApDocument* pDoc = acDocManager->curDocument();
    
74.    if (pDoc)
    
75.    {
    
76.         acutPrintf("\nCurrently in Document context : %s, Switching to
    
77. App.\n",pDoc->fileName());
    
78.         acDocManager->executeInApplicationContext(openDocHelper, (void *)pData);
    
79.    }         
    
80. 
    
81. }
    
82. 
    
83. void openDocHelper(void *pData)
    
84. {
    
85.    AcApDocument* pDoc = acDocManager->curDocument();
    
86.    if (acDocManager->isApplicationContext())
    
87.    {
    
88.         acDocManager->appContextOpenDocument((const char *)pData);
    
89.    }
    
90.    else
    
91.    {
    
92.         acutPrintf("\nERROR: in Document context : %s\n",pDoc->fileName());
    
93.    }
    
94. }
    
95. [/FONT]

复制代码

下面附件是一个完整的工程，其中介绍了AcApDocManager 类如何使用。

wweien

今天把xdsoft的44759又调试运行了一遍，终于有点懂了。
谢谢晓东。
（不过我发现的理解能力好像是太菜了点，对自己的不满程度上升10个点）
above all ,thank you , xdsoft, i benefet much from it.

hhj9611

如果是创建系列文档呢???

daib

http://mingbai.xilubbs.com

tchg

好东西, 可以侃侃

missyou0515

这样的资料，也只在XD这里才能找到，谢了！

xsz1984

谢谢共享！！！