[求助]：如何写程序读取CAD数据库中的属性值

lihb · 发表于 2006-1-17 16:31:48

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如下边的图,怎么样读取DM01,MD02a里面的数据属性值.里面保存的是图纸的作成年月日,名称,绘图单位等信息,分写在DM01a,DM02a,DM02b,DM02和DM02DEF01中.请问怎么把这么属性读出来.请大家帮忙想想.
下图是我从晓东CAD论坛上下载了"CAD数据库查看器"程序.

C:\Documents and Settings\lihongbo\My Documents\My Pictures\kkkk.jpg

附件: TEST.rar中有DWG文件和CAD数据查看器程序.

binbin · 发表于 2006-1-17 19:16:38

[FONT=courier new]
void
createXrecord()
{
AcDbDictionary *pNamedobj, *pDict;
acdbHostApplicationServices()->workingDatabase()
->getNamedObjectsDictionary(pNamedobj, AcDb::kForWrite);
// Check to see if the dictionary we want to create is
// already present. If not, then create it and add
// it to the named object dictionary.
//
if (pNamedobj->getAt("ASDK_DICT", (AcDbObject*&) pDict,
AcDb::kForWrite) == Acad::eKeyNotFound)
{
pDict = new AcDbDictionary;
AcDbObjectId DictId;
pNamedobj->setAt("ASDK_DICT", pDict, DictId);
}
pNamedobj->close();
// Add a new xrecord to the ASDK_DICT dictionary.
//
AcDbXrecord *pXrec = new AcDbXrecord;
AcDbObjectId xrecObjId;
pDict->setAt("XREC1", pXrec, xrecObjId);
pDict->close();
// Create a resbuf list to add to the xrecord.
//
struct resbuf *pHead;
ads_point testpt = {1.0, 2.0, 0.0};
pHead = acutBuildList(AcDb::kDxfText,
"This is a test Xrecord list",
AcDb::kDxfXCoord, testpt,
AcDb::kDxfReal, 3.14159,
AcDb::kDxfAngle, 3.14159,
AcDb::kDxfColor, 1,
AcDb::kDxfInt16, 180,
0);
// Add the data list to the xrecord. Notice that this
// member function takes a reference to resbuf, NOT a
// pointer to resbuf, so you must dereference the
// pointer before sending it.
//
pXrec->setFromRbChain(*pHead);
acutRelRb(pHead);
pXrec->close();
}
// Gets the xrecord associated with the key XREC1 and
// lists out its contents by passing the resbuf list to the
// function printList.
//
void
listXrecord()
{
AcDbDictionary *pNamedobj;
acdbHostApplicationServices()->workingDatabase()
->getNamedObjectsDictionary(pNamedobj, AcDb::kForRead);
// Get the dictionary object associated with the key ASDK_DICT.
//
AcDbDictionary *pDict;
pNamedobj->getAt("ASDK_DICT", (AcDbObject*&)pDict,
AcDb::kForRead);
pNamedobj->close();
// Get the xrecord associated with the key XREC1.
//
AcDbXrecord *pXrec;
pDict->getAt("XREC1", (AcDbObject*&) pXrec,
AcDb::kForRead);
pDict->close();
struct resbuf *pRbList;
pXrec->rbChain(&pRbList);
pXrec->close();
printList(pRbList);
acutRelRb(pRbList);
}
[/FONT]

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上面代码仅供参考 :(

JZ_LI · 发表于 2006-1-18 13:03:23

You are welcome for providing thus good source code,especially no meney

lihb · 发表于 2006-1-18 14:22:06

帮忙修改以下程序代码.

[FONT=courier new]
#include <stdlib.h>
#include <rxobject.h>
#include <rxregsvc.h>
#include <aced.h>
#include <dbsymtb.h>
#include <adslib.h>
#include <dbxrecrd.h>
#include <acestext.h>
void createXrecord ();
void listXrecord ();
AcDbObject* selectObject(AcDb::OpenMode);
void printList(struct resbuf* pBuf);
void initApp();
void unloadApp();
extern "C"
AcRx::AppRetCode acrxEntryPoint(AcRx::AppMsgCode, void*);
// The createXrecord() functions creates an xrecord object,
// adds data to it, and then adds the xrecord to the extension
// dictionary of a user selected object.
//
// THE FOLLOWING CODE APPEARS IN THE SDK DOCUMENT.
//
void
createXrecord()
{
AcDbXrecord *pXrec = new AcDbXrecord;
AcDbObject *pObj;
AcDbObjectId dictObjId, xrecObjId;
AcDbDictionary* pDict;
pObj = selectObject(AcDb::kForWrite);
if (pObj == NULL) {
return;
}
// Try to create an extension dictionary for this
// object. If the extension dictionary already exists,
// this will be a no-op.
//
pObj->createExtensionDictionary();
// Get the object ID of the extension dictionary for the
// selected object.
//
dictObjId = pObj->extensionDictionary();
pObj->close();
// Open the extension dictionary and add the new
// xrecord to it.
//
acdbOpenObject(pDict, dictObjId, AcDb::kForWrite);
pDict->setAt("ASDK_XREC1", pXrec, xrecObjId);
pDict->close();
// Create a resbuf list to add to the xrecord.
//
struct resbuf* head;
ads_point testpt = {1.0, 2.0, 0.0};
head = acutBuildList(AcDb::kDxfText,
"This is a test Xrecord list",
AcDb::kDxfXCoord, testpt,
AcDb::kDxfReal, 3.14159,
AcDb::kDxfAngle, 3.14159,
AcDb::kDxfColor, 1,
AcDb::kDxfInt16, 180,
0);
// Add the data list to the xrecord. Notice that this
// member function takes a reference to a resbuf NOT a
// pointer to a resbuf, so you must dereference the
// pointer before sending it.
//
pXrec->setFromRbChain(*head);
pXrec->close();
acutRelRb(head);
}
// The listxrecord() functions gets the xrecord associated with the
// key "ASDK_XREC1" and lists out its contents by passing the resbuf
// list to the function printList().
//
void
listXrecord()
{
AcDbObject *pObj;
AcDbXrecord *pXrec;
AcDbObjectId dictObjId;
AcDbDictionary *pDict;
pObj = selectObject(AcDb::kForRead);
if (pObj == NULL) {
return;
}
// Get the object ID of the object's extension dictionary.
//
dictObjId = pObj->extensionDictionary();
pObj->close();
// Open the extension dictionary and get the xrecord
// associated with the key ASDK_XREC1.
//
acdbOpenObject(pDict, dictObjId, AcDb::kForRead);
pDict->getAt("ASDK_XREC1", (AcDbObject*&)pXrec,
AcDb::kForRead);
pDict->close();
// Get the xrecord's data list and then close the xrecord.
//
struct resbuf *pRbList;
pXrec->rbChain(&pRbList);
pXrec->close();
printList(pRbList);
acutRelRb(pRbList);
}
// END CODE APPEARING IN SDK DOCUMENT.
// The selectObject() function prompts the user to select an
// entity or enter an object's handle. It then proceeds to
// open the object/entity and return a pointer to it.
//
AcDbObject*
selectObject(AcDb::OpenMode openMode)
{
ads_name en;
ads_point pt;
char handleStr[132];
AcDbObjectId eId;
Acad::ErrorStatus retStat;
int ss;
// Allow user to either pick an entity,
// or type in the object handle.
//
acedInitGet(RSG_OTHER, "_Handle Handle");
ss = acedEntSel("\nSelect an Entity or enter"
" 'H' to enter its handle: ", en, pt);
switch (ss) {
case RTNORM: // got it!
break;
case RTKWORD:
if ((acedGetString(Adesk::kFalse,
"Enter Valid Object Handle: ",
handleStr) == RTNORM)
&& (acdbHandEnt(handleStr, en) == RTNORM))
{
break;
}
// Fall-through intentional
//
default:
acutPrintf("Nothing Selected, Return Code==%d\n",
ss);
return NULL;
}
// Now, exchange the ads_name for the object Id...
//
retStat = acdbGetObjectId(eId, en);
if (retStat != Acad::eOk) {
acutPrintf("\nacdbGetObjectId failed");
acutPrintf("\nen==(%lx,%lx), retStat==%d\n",
en[0], en[1], eId);
return NULL;
}
AcDbObject* pObj;
if ((retStat = acdbOpenObject(pObj, eId, openMode))
!= Acad::eOk)
{
acutPrintf("acdbOpenEntity failed: ename:"
"(%lx,%lx), mode:%d retStat:%d", en[0],
en[1], openMode, retStat);
return NULL;
}
return pObj;
}
// The printList() function takes a linked list of resbufs
// as an argument. Walks the list printing out the restypes
// and resval values one set per line.
//
void
printList(struct resbuf* pBuf)
{
int rt, i;
char buf[133];
for (i = 0;pBuf != NULL;i++, pBuf = pBuf->rbnext) {
if (pBuf->restype < 0)
rt = pBuf->restype;
else if (pBuf->restype < 10)
rt = RTSTR;
else if (pBuf->restype < 38)
rt = RT3DPOINT;
else if (pBuf->restype < 60)
rt = RTREAL;
else if (pBuf->restype < 80)
rt = RTSHORT;
else if (pBuf->restype < 100)
rt = RTLONG;
else if (pBuf->restype < 106)
rt = RTSTR;
else if (pBuf->restype < 148)
rt = RTREAL;
else if (pBuf->restype < 290)
rt = RTSHORT;
else if (pBuf->restype < 320)
rt = RTSTR;
else if (pBuf->restype < 370)
rt = RTENAME;
else if (pBuf->restype < 999)
rt = RT3DPOINT;
else
rt = pBuf->restype;
switch (rt) {
case RTSHORT:
if (pBuf->restype == RTSHORT)
acutPrintf("RTSHORT : %d\n",
pBuf->resval.rint);
else
acutPrintf("(%d . %d)\n", pBuf->restype,
pBuf->resval.rint);
break;
case RTREAL:
if (pBuf->restype == RTREAL)
acutPrintf("RTREAL : %0.3f\n",
pBuf->resval.rreal);
else
acutPrintf("(%d . %0.3f)\n", pBuf->restype,
pBuf->resval.rreal);
break;
case RTSTR:
if (pBuf->restype == RTSTR)
acutPrintf("RTSTR : %s\n",
pBuf->resval.rstring);
else
acutPrintf("(%d . "%s")\n", pBuf->restype,
pBuf->resval.rstring);
break;
case RT3DPOINT:
if (pBuf->restype == RT3DPOINT)
acutPrintf(
"RT3DPOINT : %0.3f, %0.3f, %0.3f\n",
pBuf->resval.rpoint[X],
pBuf->resval.rpoint[Y],
pBuf->resval.rpoint[Z]);
else
acutPrintf(
"(%d %0.3f %0.3f %0.3f)\n",
pBuf->restype,
pBuf->resval.rpoint[X],
pBuf->resval.rpoint[Y],
pBuf->resval.rpoint[Z]);
break;
case RTLONG:
acutPrintf("RTLONG : %dl\n",
pBuf->resval.rlong);
break;
case -1:
case RTENAME:
acutPrintf("(%d . <Entity name: %8lx>)\n",
pBuf->restype, pBuf->resval.rlname[0]);
break;
case -3:
acutPrintf("(-3)\n");
}
if ((i == 23) && (pBuf->rbnext != NULL)) {
i = 0;
acedGetString(0,
"Press <ENTER> to continue...", buf);
}
}
return;
}
// Initialization function called in acrxEntryPoint
// during the kInitAppMsg case. This is where commands
// are added to the AcEd command stack.
//
void
initApp()
{
acedRegCmds->addCommand("ASDK_EXTDICT_COMMANDS",
"ASDK_CREATE", "CREATE", ACRX_CMD_MODAL,
createXrecord);
acedRegCmds->addCommand("ASDK_EXTDICT_COMMANDS",
"ASDK_LISTXREC", "LISTXREC", ACRX_CMD_MODAL,
listXrecord);
}
// Clean up function called in acrxEntryPoint during the
// kUnloadAppMsg case. This app's command group is
// removed from the AcEd command stack.
//
void
unloadApp()
{
acedRegCmds->removeGroup("ASDK_EXTDICT_COMMANDS");
}
// ARX entry point.
//
AcRx::AppRetCode
acrxEntryPoint(AcRx::AppMsgCode msg, void* appId)
{
switch (msg) {
case AcRx::kInitAppMsg:
acrxDynamicLinker->unlockApplication(appId);
acrxDynamicLinker->registerAppMDIAware(appId);
initApp();
break;
case AcRx::kUnloadAppMsg:
unloadApp();
}
return AcRx::kRetOK;
}
[/FONT]

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[求助]：如何写程序读取CAD数据库中的属性值

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