[求助]求助一个关于扩展数据的问题

56854365 发表于 2006-5-5 20:38:00

怎么样把以前添加的AUTOCAD扩展数据更新成新的或删除
下面是网上找到的清除扩展数据的代码，我看不懂

void delXdata() {     ads_name eNam;          ads_point pt;          int ret = acedEntSel ("\nselect an object:", eNam, pt);            if ( ret!= RTNORM)         {          return;         }        AcDbObjectId ObjId;        acdbGetObjectId(ObjId, eNam);        AcDbEntity *pEnt;     acdbOpenAcDbEntity(pEnt, ObjId, AcDb::kForWrite);     resbuf *xdata = pEnt->xData(NULL);     if (xdata)     {          xdata->rbnext = NULL;             pEnt->setXData(xdata);             acutRelRb(xdata);     }          pEnt->close(); }

heluyuan 发表于 2006-5-16 19:10:00

public void delXdata()<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
         {<o:p></o:p>
              ads_name eNam;<o:p></o:p>
    <o:p></o:p>
              ads_point pt;<o:p></o:p>
    <o:p></o:p>
              int ret = acedEntSel ("\nselect an object:", eNam, pt);   //点选获得一个实体<o:p></o:p>
    <o:p></o:p>
              if ( ret!= RTNORM)    <o:p></o:p>
              { <o:p></o:p>
                   return;    <o:p></o:p>
              }<o:p></o:p>
  <o:p></o:p>
              AcDbObjectId ObjId;<o:p></o:p>
  <o:p></o:p>
              acdbGetObjectId(ObjId, eNam);    //获得实体的ID<o:p></o:p>
  <o:p></o:p>
              AcDbEntity *pEnt;<o:p></o:p>
<o:p> </o:p>
              acdbOpenAcDbEntity(pEnt, ObjId, AcDb::kForWrite);  //通过ObjectID打开实体来编辑<o:p></o:p>
<o:p> </o:p>
              resbuf *xdata = pEnt->xData(NULL);   //获取实体的扩展数据结果缓冲区链表<o:p></o:p>
<o:p> </o:p>
              if (xdata)    //如果该扩展数据结果缓冲区链表不为空<o:p></o:p>
              {<o:p></o:p>
                   xdata->rbnext = NULL;  //将该结果缓冲区链表的后续指针置为空<o:p></o:p>
  <o:p></o:p>
                   pEnt->setXData(xdata); //将该实体的扩展数据设为置为空了的结果缓冲区<o:p></o:p>
   <o:p></o:p>
                   acutRelRb(xdata);  //释放链表<o:p></o:p>
              }<o:p></o:p>
    <o:p></o:p>
              pEnt->close();<o:p></o:p>
         }

heluyuan 发表于 2006-5-17 10:13:00

本想发贴咨询一下在AutoCAD 2007.NET API中，用C＃中如何给实体设置XData扩展属性，现就此贴延续一下了，希望能把XData彻底弄清楚。<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
在VC60下的XData的添加方法，Autodesk公司的示例文档中有很好的代码：
void 
addXdata() 
{
    AcDbObject* pObj = selectObject(AcDb::kForRead);
    if (!pObj) {
        acutPrintf("Error selecting object\n");
        return;
    }
<o:p> </o:p>
    
    // Get the application name and string to be added to
    // xdata.
    //
    char appName, resString;
    appName = resString = '\0';
<o:p> </o:p>
    acedGetString(NULL, "Enter application name: ",
        appName);
    acedGetString(NULL, "Enter string to be added: ",
        resString);
<o:p> </o:p>
    
    struct  resbuf  *pRb, *pTemp;
    
    pRb = pObj->xData(appName);
<o:p> </o:p>
    if (pRb != NULL) {
<o:p> </o:p>
        // If xdata is present, then walk to the
        // end of the list.
        //
        for (pTemp = pRb; pTemp->rbnext != NULL;
                pTemp = pTemp->rbnext)
                { ; }
    } else {
        // If xdata is not present, register the application
        // and add appName to the first resbuf in the list.
        // Notice that there is no -3 group as there is in
        // AutoLISP. This is ONLY the xdata so
        // the -3 xdata-start marker isn't needed.
        // 
        acdbRegApp(appName);
<o:p> </o:p>
        pRb = acutNewRb(AcDb::kDxfRegAppName);
        pTemp = pRb;
        pTemp->resval.rstring
            = (char*) malloc(strlen(appName) + 1);
        strcpy(pTemp->resval.rstring, appName);
    }
<o:p> </o:p>
    // Add user-specified string to the xdata.
    //
    pTemp->rbnext = acutNewRb(AcDb::kDxfXdAsciiString);
    pTemp = pTemp->rbnext;
    pTemp->resval.rstring
        = (char*) malloc(strlen(resString) + 1);
    strcpy(pTemp->resval.rstring, resString);
<o:p> </o:p>
    // The following code shows the use of upgradeOpen()
    // to change the entity from read to write.
    //
    pObj->upgradeOpen();
    pObj->setXData(pRb);
    
    pObj->close();
    acutRelRb(pRb);
}
问题是在AutoCAD 2007.NET API下：<o:p></o:p>
网上现有的只是关于Xrecord的示例代码，如下：<o:p></o:p>
public ObjectId createXrecord(string name,string salary,string division)<o:p></o:p>
{<o:p></o:p>
    Database db = HostApplicationServices.WorkingDatabase;<o:p></o:p>
    Transaction trans = db.TransactionManager.StartTransaction();<o:p></o:p>
    try<o:p></o:p>
    {<o:p></o:p>
        BlockTable bt = (BlockTable)MyT.GetObject(db.BlockTableId, OpenMode.ForWrite, false);<o:p></o:p>
        BlockTableRecord br = (BlockTableRecord)MyT.GetObject(bt, OpenMode.ForWrite, false); <o:p></o:p>
        <o:p></o:p>
        //Create the custom per-employee data<o:p></o:p>
        Xrecord xRec = new Xrecord();<o:p></o:p>
        //We want to add //Name//, //Salary// and //Division// information.  Here is how:<o:p></o:p>
        xRec.Data = new ResultBuffer( <o:p></o:p>
            new TypedValue((int)DxfCode.Text, name), <o:p></o:p>
            new TypedValue((int)DxfCode.Real, salary), <o:p></o:p>
            new TypedValue((int)DxfCode.Text, division));<o:p></o:p>
<o:p> </o:p>
        //Next, we need to add this data to the //Extension Dictionary// of the employee.<o:p></o:p>
        br.CreateExtensionDictionary();<o:p></o:p>
        DBDictionary brExtDict = (DBDictionary)trans.GetObject(br.ExtensionDictionary, OpenMode.ForWrite, false);<o:p></o:p>
        brExtDict.SetAt("EmployeeData", xRec); //Set our XRecord in the dictionary at //EmployeeData//.<o:p></o:p>
        trans.AddNewlyCreatedDBObject(xRec, true);<o:p></o:p>
        return xRec.ObjectId;<o:p></o:p>
    }<o:p></o:p>
    catch<o:p></o:p>
    {<o:p></o:p>
        return ObjectId.Null;<o:p></o:p>
    }    <o:p></o:p>
}<o:p></o:p>
<o:p> </o:p>
但为何添加XData扩展数据就会报错eBadDxfSequence呢？<o:p></o:p>
public void addXData(Entity ent,string name,string salary,string division)<o:p></o:p>
        {<o:p></o:p>
            Database db = HostApplicationServices.WorkingDatabase;<o:p></o:p>
            Transaction MyT = db.TransactionManager.StartTransaction();<o:p></o:p>
            try<o:p></o:p>
            {<o:p></o:p>
                BlockTable bt = (BlockTable)MyT.GetObject(db.BlockTableId, OpenMode.ForWrite, false);<o:p></o:p>
                BlockTableRecord btr = (BlockTableRecord)MyT.GetObject(bt, OpenMode.ForWrite, false); <o:p></o:p>
                ent.XData = new ResultBuffer();<o:p></o:p>
                ent.XData = new ResultBuffer(<o:p></o:p>
                new TypedValue((int)DxfCode.Text, name),<o:p></o:p>
                new TypedValue((int)DxfCode.Real, salary),<o:p></o:p>
                new TypedValue((int)DxfCode.Text, division));<o:p></o:p>
                btr.AppendEntity(ent);<o:p></o:p>
                MyT.AddNewlyCreatedDBObject(ent, true);<o:p></o:p>
            }<o:p></o:p>
            catch<o:p></o:p>
            {<o:p></o:p>
            }<o:p></o:p>
        }<o:p></o:p>
<o:p> </o:p>
后来又试过如下方法： <o:p></o:p>
                    Autodesk.AutoCAD.DatabaseServices.SymbolUtilityServices.IsRegAppAcadName("name");<o:p></o:p>
                    pEnt.XData = new ResultBuffer(new TypedValue((int)DxfCode.ExtendedDataRegAppName,"name"));<o:p></o:p>
                    pEnt.XData.Add(new TypedValue((int)DxfCode.ExtendedDataControlString, "this is a test!"));<o:p></o:p>
<o:p> </o:p>
也报错……为eRegappIdNotFound，应该是因为未注册应用程序名的原因，<o:p></o:p>
求教全局函数acdbRegApp(appName)在C＃中的对应方法！！<o:p></o:p>

aqin 发表于 2007-7-22 01:43:00

<pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;"> public void AddXData()</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">        {</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            ed.WriteMessage("添加扩充数据XDATA\n");</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象\n");</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            PromptEntityResult entRes;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            entRes = ed.GetEntity(entOps);</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            if (entRes.Status != PromptStatus.OK)</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            {</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                ed.WriteMessage("选择对象失败，退出");</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                return;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            }</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            ObjectId objId = entRes.ObjectId;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            Database db = HostApplicationServices.WorkingDatabase;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            using (Transaction trans = db.TransactionManager.StartTransaction())</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            {</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                Entity ent = trans.GetObject(objId, OpenMode.ForWrite) as Entity ;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                ent.ColorIndex = 1;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;"> </pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                RegAppTable appTbl = trans.GetObject(db.RegAppTableId, OpenMode.ForWrite) as RegAppTable ;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                if (!appTbl.Has("MyAppName"))</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                {</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                    RegAppTableRecord appTblRcd = new RegAppTableRecord();</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                    appTblRcd.Name = "MyAppName";</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                    appTbl.Add(appTblRcd);</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                    trans.AddNewlyCreatedDBObject(appTblRcd, true);</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                }</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                ResultBuffer resBuf = new ResultBuffer();//new TypedValue(1001, "MyAppName"), new TypedValue(1000, "开发部门"));</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;"> </pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                resBuf.Add(new TypedValue(1001, "MyAppName"));//注册程序名称</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                resBuf.Add(new TypedValue(1000 , " Hongxian Qin"));//姓名</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                resBuf.Add(new TypedValue(1000 , " 工程部"));//部门</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                resBuf.Add(new TypedValue(1040, 2000.0));//薪水</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                ent.XData =  resBuf;</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">                trans.Commit();</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">            }</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">
</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;">        }</pre><pre style="BACKGROUND: #e6e6e6; tab-stops: 21.75pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;"> </pre>

aqin 发表于 2007-7-22 01:44:00

public void GETXDATA()         {             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;             ed.WriteMessage("获取扩充数据XDATA\n");            PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象");             PromptEntityResult entRes = ed.GetEntity(pr);             if (entRes.Status != PromptStatus.OK)             {                 ed.WriteMessage("选择对象失败，退出");                 return;             }             Database db = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database;             using (Transaction tr = db.TransactionManager.StartTransaction())             {                Entity ent = (Entity)tr.GetObject(res.ObjectId, OpenMode.ForRead);                 ResultBuffer resBuf = ent.XData;                 if (rb != null)                 {                     //                     IEnumerator iter = resBuf.GetEnumerator();                     while (iter.MoveNext())                     {                         TypedValue tmpVal = (TypedValue)iter.Current;                         ed.WriteMessage(tmpVal.TypeCode.ToString() + ":");                         ed.WriteMessage(tmpVal.Value.ToString() + "\n");                     }                 }             }         }

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[求助]求助一个关于扩展数据的问题