向数据库读写用户自定义的全局数据，通过扩展记录实体

• 回答：

          void wirteVer(String sName, String sVal)
          {
  
              MxDrawDatabase database = (MxDrawDatabase)axMxDrawX1.GetDatabase();
              MxDrawDictionary dict = database.GetNamedObjectsDictionary();
  
              MxDrawDictionary myDict = (MxDrawDictionary)dict.GetAt("MyExDataDictName");            if (myDict == null)
              {
                  myDict = (MxDrawDictionary)dict.AddObject("MyExDataDictName", "McDbDictionary");
  
              }
  
              MxDrawXRecord rec = (MxDrawXRecord)myDict.GetAt(sName);            if (rec == null)
              {
  
                  rec = myDict.AddXRecord(sName);
              }
  
              MxDrawResbuf res = new MxDrawResbuf();
              res.AddString(sVal);
  
              rec.SetXRecordData(res);
  
          }
  
  
          String readVar(String sName)
          {
  
              MxDrawDatabase database = (MxDrawDatabase)axMxDrawX1.GetDatabase();
              MxDrawDictionary dict = database.GetNamedObjectsDictionary();
  
              MxDrawDictionary myDict = (MxDrawDictionary)dict.GetAt("MyExDataDictName");            if (myDict == null)
              {                return "";
  
              }
  
              MxDrawXRecord rec = (MxDrawXRecord)myDict.GetAt(sName);            if (rec == null)
              {                return "";
              }
  
              MxDrawResbuf  ret =  rec.GetXRecordData();            if (ret == null)                return "";            return ret.AtString(0);
  
          }        private void buttondict_Click(object sender, EventArgs e)
          {
       
  
              wirteVer("MyName", "666666");
          }        private void buttonreaddict_Click(object sender, EventArgs e)
          {
              String sRet = readVar("MyName");            if (sRet == "")
              {
                  MessageBox.Show("没有数据");
              }            else
              {
  
                  MessageBox.Show(sRet);
              }
          }